## T_GEOMETRY/CONSTRUCTORS [ Modules ]

NAME

A collection of T_GEOMETRY Constructors.

SOURCE

Constructor Function T_GEOMETRY (p_geom in mdsys.sdo_geometry) Return Self As Result, Constructor Function T_GEOMETRY (p_geom in mdsys.sdo_geometry, p_tolerance in number) Return Self As Result, Constructor Function T_GEOMETRY (p_geom in mdsys.sdo_geometry, p_tolerance in number, p_precision in integer) Return Self As Result, Constructor Function T_GEOMETRY (p_geom in mdsys.sdo_geometry, p_tolerance in number, p_precision in integer, p_projected in varchar2) Return Self As Result, Constructor Function T_GEOMETRY (p_vertex in mdsys.vertex_type, p_srid in integer, p_tolerance in number default 0.05) Return Self As Result, Constructor Function T_GEOMETRY (p_vector in &&INSTALL_SCHEMA..T_Vector, p_srid in integer, p_tolerance in number default 0.05, p_precision in integer default 2, p_projected in varchar2 default 'PLANAR') Return Self As Result,

## T_GEOMETRY/orderBy [ Methods ]

NAME

orderBy-- Implements ordering function that can be used to sort a collection of T_GEOMETRY objects.

SYNOPSIS

Order Member FunctionorderBy(p_compare_geom in &&INSTALL_SCHEMA..T_GEOMETRY) Return Number deterministic

INPUTS

p_compare_geom (T_GEOMETRY) - Order pair

DESCRIPTION

This order by function allows a collection of T_GEOMETRY objects to be sorted. For example in the ORDER BY clause of a SELECT statement. Comparison uses all ordinates: X, Y, Z and W.

EXAMPLE

With geometries as ( select t_geometry(sdo_geometry(2001,null, sdo_point_type(dbms_random.value(0,level), dbms_random.value(0,level), null), null,null), 0.05, 3, 1) as tgeom from dual connect by level < 10 ) select a.tgeom.st_astext(2) as sGeom from geometries a order by a.tgeom; SGEOM ------------------------------------------------------------------------------------------ T_GEOMETRY(SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(0.39,0.87,NULL),NULL,NULL);TOLERANCE(.05) T_GEOMETRY(SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(0.71,0.04,NULL),NULL,NULL);TOLERANCE(.05) T_GEOMETRY(SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(1.68,1.03,NULL),NULL,NULL);TOLERANCE(.05) T_GEOMETRY(SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(1.72,1.45,NULL),NULL,NULL);TOLERANCE(.05) T_GEOMETRY(SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(2.68,1.99,NULL),NULL,NULL);TOLERANCE(.05) T_GEOMETRY(SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(3.12,1.14,NULL),NULL,NULL);TOLERANCE(.05) T_GEOMETRY(SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(3.38,0.71,NULL),NULL,NULL);TOLERANCE(.05) T_GEOMETRY(SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(4.75,4.46,NULL),NULL,NULL);TOLERANCE(.05) T_GEOMETRY(SDO_GEOMETRY(2001,NULL,SDO_POINT_TYPE(5.49,6.87,NULL),NULL,NULL);TOLERANCE(.05) 9 rows selected

RESULT

order value (NUMBER) - -1 less than; 0 equal; 1 greater than

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

(c) 2012-2017 by TheSpatialDBAdvisor/Simon Greener LICENSE Creative Commons Attribution-Share Alike 2.5 Australia License. http://creativecommons.org/licenses/by-sa/2.5/au/

## T_GEOMETRY/PI [ Functions ]

NAME

PI-- Returns constantPIvalue.

SYNOPSIS

Static FunctionPIReturn Number

DESCRIPTION

This function exposes static constantPI.

EXAMPLE

SELECT T_GEOMETRY.PI() FROM DUAL; T_GEOMETRY.PI() --------------------------------------- 3.1415926535897932384626433832795028842

RESULT

PI(NUMBER) - eg 3.14....

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

(c) 2012-2017 by TheSpatialDBAdvisor/Simon Greener LICENSE Creative Commons Attribution-Share Alike 2.5 Australia License. http://creativecommons.org/licenses/by-sa/2.5/au/

## T_GEOMETRY/ST_Add_Vector [ Methods ]

NAME

ST_Add_Vector-- Adds a vector to an existing geometry.

SYNOPSIS

Member FunctionST_Add_Vector(p_vector in &&INSTALL_SCHEMA..T_Vector) Return &&INSTALL_SCHEMA..T_Geometry deterministic,

DESCRIPTION

Adds a vector to an existing geometry. If last vertex of existing geometry equals first vertex of vector the point is not repeated. Supports vectors that define a circular arc.

INPUTS

p_vector (T_VECTOR) - Valid vector. Supports 2 vertex or 3 vertex circular arc vectors.

RESULT

geometry (T_GEOMETRY) - Modified geometry

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

(c) 2012-2017 by TheSpatialDBAdvisor/Simon Greener LICENSE Creative Commons Attribution-Share Alike 2.5 Australia License. http://creativecommons.org/licenses/by-sa/2.5/au/

## T_GEOMETRY/ST_AsText [ Methods ]

NAME

ST_AsText-- Returns text Description of T_GEOMETRY

SYNOPSIS

Member FunctionST_AsText(p_linefeed in integer default 1) Return CLOB Deterministic,

DESCRIPTION

Returns textual description of T_GEOMETRY. Rounds ordinates via object precision variable.

INPUTS

p_linefeed (integer) - 1 if apply linefeed to coordinates

RESULT

textual description (string)

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_Buffer [ Methods ]

NAME

ST_Buffer-- Creates a buffer around input geometry.

SYNOPSIS

Member FunctionST_Buffer(p_distance in number, p_unit in varchar2 default null) Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic

DESCRIPTION

This function creates a square buffer around all linestrings in an object. A negative buffer is not possible.

INPUTS

p_distance (NUMBER) - Value > 0.0 p_unit (VARCHAR2) - Unit of measure for distance calculations.

RESULT

polygon (T_GEOMETRY) - Result of buffering input geometry.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_Centroid [ Methods ]

NAME

ST_Centroid-- Creates a centroid for any mdsys.sdo_geometry object.

SYNOPSIS

Member FunctionST_Centroid(p_option in varchar2 := 'LARGEST', p_unit in varchar2 default null) Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic

DESCRIPTION

This function creates a single centroid if the line-string being operated on has a single part. The position of the centroid is either the mid-length point if the line is not measured, or the mid-measure position if measured. For a single line-string any supplied p_option value is ignored. If the geometry is a multi-linestring a number of options are available. - LARGEST -- Returns centroid of largest (measure/length) line-string in multi-linestring (DEFAULT) - SMALLEST -- Returns centroid of smallest (measure/length) line-string in multi-linestring - MULTI -- Returns all centroid for all parts of multi-linestring as a single multi-point (x005 gtype) geometry. The centroid of each part is constructed using the same rules as for a single line-string.

INPUTS

p_option (VARCHAR2) - LARGEST, SMALLEST, or MULTI. Ignored if single linestring. p_unit (VARCHAR2) - Unit of measure for distance calculations.

RESULT

point (T_GEOMETRY) - Centroid of input object.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_Concat_Line (1.0) [ Methods ]

NAME

ST_Concat_Line -- Adds supplied linestring to start/end of underlying linestring depending on geometric relationship.

DESCRIPTION

Joins two linestrings together depending on start/end relationships of the supplied linestring and the underlying linestring. Does not support point or polygon geometries.

INPUTS

p_line (SDO_GEOMETRY) - Geometry to be added to underlying mdsys.sdo_geometry.

RESULT

linestring (T_GEOMETRY) - Line that is the result of concatenating the two linestrings.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original Coding. LICENSE Creative Commons Attribution-Share Alike 2.5 Australia License. http://creativecommons.org/licenses/by-sa/2.5/au/

## T_GEOMETRY/ST_CoordDim [ Methods ]

NAME

ST_CoordDim-- Executes, and returns, result of mdsys.sdo_geometry methodST_CoordDim().

SYNOPSIS

Member FunctionST_CoordDimReturn INTEGER Deterministic,

DESCRIPTION

Is a wrapper over the mdsys.sdo_geometry method SELF.GEOM.ST_CoordDim(). Returns Coordinate Dimension of mdsys.sdo_geometry object.

RESULT

Coordinate Dimension (SMALLINT) -- 2 if 2001; 3 is 3001 etc.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_DB_Version [ Functions ]

NAME

ST_DB_Version-- Returns Database Version and sub version.

SYNOPSIS

Static FunctionST_DB_VersionReturn Number

DESCRIPTION

This function return database version which is useful when handling Oracle functions that only appear in certain versions

EXAMPLE

SELECT T_GEOMETRY.ST_DB_Version() FROM DUAL; T_GEOMETRY.ST_DB_Version() -------------------------- 11.2

RESULT

Database Version (NUMBER) - eg 11.2 Database(12.1)

AUTHOR

Simon Greener

HISTORY

Simon Greener - May 2016 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_Dims [ Methods ]

NAME

ST_Dims-- Returns number of ordinate dimensions

SYNOPSIS

Member FunctionST_DimsReturn INTEGER Deterministic,

DESCRIPTION

Is a wrapper over the mdsys.sdo_geometry get_dims() method ie SELF.GEOM.Get_Dims()

RESULT

dimension (INTEGER) -- 2 if data 2D; 3 if 3D; 4 if 4D

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_Distance [ Methods ]

NAME

ST_Distance-- Returns distance from current T_geometry (SELF) to supplied T_GEOMETRY.

SYNOPSIS

Member FunctionST_Distance(p_geom in &&INSTALL_SCHEMA..T_GEOMETRY, p_unit in varchar2 default NULL) Return Number Deterministic

INPUTS

p_geom (T_GEOMETRY) - A T_GEOMETRY to which a distance is calculated. p_unit (VARCHAR2) - Oracle Unit of Measure eg unit=M.

DESCRIPTION

This function computes a distance from the current object (SELF) to the supplied T_Geometry. Result is in the distance units of the SDO_SRID, or in p_units where supplied.

RESULT

distance (Number) -- Distance in SRID unit of measure or in supplied units (p_unit)

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_Dump [ Methods ]

NAME

ST_Dump-- Extracts all parts of a multipart linestring, polygon, or collection geometry.

SYNOPSIS

Member FunctionST_Dump(p_subElements IN integer Default 0) Return &&INSTALL_SCHEMA..T_Geometries Pipelined

DESCRIPTION

Extracts all parts of an underlying geometry object. If p_subElemets is set to TRUE (1), all subElements of a complex element (eg compound outer ring of polygon) are extracted and returned as mdsys.sdo_geometry objects. Individual sdo_gemetry objects are returned in a T_GEOMROW structure that has three fields: GID, GEOMETRY and TOLERANCE. GID values are generated in the order the elements appears in the sdo_elem_info structure.

EXAMPLE

with GEOMETRIES as ( select t_geometry( mdsys.sdo_geometry(2007,null,null, sdo_elem_info_array( 1,1003,1,11,2003,1,21,2003,1, 31,1005,2,31,2,1,37,2,2,43,1003,3), sdo_ordinate_array(0,0, 20,0, 20,20, 0,20, 0,0, 10,10, 10,11, 11,11, 11,10, 10,10, 5,5, 5,7, 7,7, 7,5, 5,5, 110,128, 110,125, 120,125, 120,128, 115,130, 110,128,112,0, 113,10)) ,0.05,3,1) as tPolygon From dual ) GID GEOMETRY TOLERANCE --- -------------------------------------------------------------------------------------------------------- --------- 1 mdsys.sdo_geometry(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(0,0,20,0,20,20,0,20,0,0,10,10)) 0.05 2 mdsys.sdo_geometry(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(10,10,10,11,11,11,11,10,10,10,5,5)) 0.05 3 mdsys.sdo_geometry(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(5,5,5,7,7,7,7,5,5,5)) 0.05 1 mdsys.sdo_geometry(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,1),SDO_ORDINATE_ARRAY(110,128,110,125,120,125,120,128)) 0.05 2 mdsys.sdo_geometry(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,2),SDO_ORDINATE_ARRAY(120,128,115,130,110,128)) 0.05 1 mdsys.sdo_geometry(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,2,3),SDO_ORDINATE_ARRAY(112,0,113,10)) 0.05 6 rows selected

RESULT

Geometry (T_GEOMROW) -- Table (T_GEOMETRIES) of T_GEOMROW objects.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_ElemInfo [ Methods ]

NAME

ST_ElemInfo-- Returns underlying mdsys.sdo_geometry's SDO_ELEM_INFO array as a Set of T_ElemInfo objects.

SYNOPSIS

Member FunctionST_ElemInfoReturn &&INSTALL_SCHEMA..T_ElemInfoSet pipelined

DESCRIPTION

If a geometry is coded with an SDO_ELEM_INFO_ARRAY this function will extract the triplets that describe each element and returns them as a set of T_ELEM_INFO objects. The T_ElemInfo object is: CREATE TYPE &&INSTALL_SCHEMA..T_ElemInfo AS OBJECT ( offset NUMBER, etype NUMBER, interpretation NUMBER );

RESULT

Set of T_ElemInfo objects (INTEGER) NOTE Function is pipelined

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2006 - Original coding in GEOM package. Simon Greener - Jan 2013 - Port to T_GEOMETRY object.

COPYRIGHT

## T_GEOMETRY/ST_Equals [ Methods ]

NAME

ST_Equals-- Compares current object (SELF) with supplied T_GEOMETRY.

SYNOPSIS

Member FunctionST_Equals(p_tgeometry in &&INSTALL_SCHEMA..T_Geometry) Return Integer deterministic

INPUTS

p_tygeoemtry (T_GEOMETRY) - T_GEOEMTRY that is to be compared to current object (SELF).

DESCRIPTION

This function compares current t_geometry object (SELF) to supplied p_tgeometry object. Only compares SDO_GEOMETRY objects.

RESULT

BOOLEAN (INTEGER) - 1 is True (Equal); 0 is False.

AUTHOR

Simon Greener

HISTORY

Simon Greener - July 2017 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_ExtractRings [ Methods ]

NAME

ST_ExtractRings-- Extracts all rings of a polygon/multipolygon into a set of simple T_GEOMETRY polygon objects.

SYNOPSIS

Member FunctionST_ExtractRings() Return &&INSTALL_SCHEMA..T_GEOMETRIES Pipelined

DESCRIPTION

This function allows a user to extract all outer and inner rings from a polygon/multipolygon. The resultant set of individual inner or outer rings are accessible via the Oracle SQL TABLE function as in the example below.

EXAMPLE

With geometries As ( Select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5))',null), 0.05,3,1) as tPolygon From dual ) Select a.tPolygon.ST_ExtractRings(10).geom as fGeom From geometries a; FGEOM ------------------------------------------------------------------------------------------------------ mdsys.sdo_geometry(2003,null,null,sdo_elem_info_array(1,1003,1),sdo_ordinate_array(0,0,20,0,20,20,0,20,0,0))

RESULT

polygon (T_GEOMETRY) -- With rings whose area < p_are removed.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_FilterRings [ Methods ]

NAME

ST_FilterRings-- Removes rings from polygon/multipolygon below supplied area.

SYNOPSIS

Member FunctionST_FilterRings(p_area in number, p_unit in varchar2 default null) Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,

INPUTS

p_area (Number) - Area in square SRID units below which an inner ring is removed. p_unit (VARCHAR2) - Oracle Unit of Measure For SRID eg unit=M.

DESCRIPTION

This function allows a user to remove inner rings from a polygon/multipolygon based on an area value. Will remove both outer and inner rings.

EXAMPLE

With polygons As ( Select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5))',null),0.05,3,1) as TGeom From Dual Union All Select T_GEOMETRY(sdo_geometry(2007,NULL,NULL, sdo_elem_info_array(1,1005,2, 1,2,1, 7,2,2,13,1003,3), sdo_ordinate_array (10,128, 10,125, 20,125, 20,128, 15,130, 10,128, 0,0, 10,10)),0.05,3,1) as TGeom From Dual ) Select T.geometry From polygons a, Table(a.tGeom.ST_ExtractRings()) t; GEOMETRY ------------------------------------------------------------------------------------------------------------------------------------ mdsys.sdo_geometry(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1003,1),SDO_ORDINATE_ARRAY(0,0,20,0,20,20,0,20,0,0)) mdsys.sdo_geometry(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1003,1),SDO_ORDINATE_ARRAY(10,10,11,10,11,11,10,11,10,10)) mdsys.sdo_geometry(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1003,1),SDO_ORDINATE_ARRAY(5,5,7,5,7,7,5,7,5,5)) mdsys.sdo_geometry(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1005,2,1,2,1,7,2,2),SDO_ORDINATE_ARRAY(10,128,10,125,20,125,20,128,15,130,10,128)) mdsys.sdo_geometry(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1003,3),SDO_ORDINATE_ARRAY(0,0,10,10))

RESULT

polygon collection (T_GEOMETRIES) -- A set of one or more single rings derived from input polygon.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_GeometryType [ Methods ]

NAME

ST_GeometryType-- Returns underlying mdsys.sdo_geometry's SQLMM Geometry Type.

SYNOPSIS

Member FunctionST_GeometryTypeReturn VarChar2 Deterministic,

DESCRIPTION

Is a wrapper over the ST_GEOMETRYST_GeometryType() method. Returns textual description of the geometry type eg ST_Polygon for x003 mdsys.sdo_geometry object.

RESULT

geometry type (INTEGER) -- 1:Point; 2:Linestring; 3:Polygon; 4:Collection; 5:MultiPoint; 6:MultiLinestring; 7:MultiPolygon

EXAMPLE

With Geometries As ( select T_GEOMETRY(sdo_geometry(2001,NULL,sdo_point_type(10,11,null),null,null),0.05,2,1) as TGEOM From Dual Union All Select T_GEOMETRY(sdo_geometry(2002,NULL,NULL,sdo_elem_info_array(1,2,1),sdo_ordinate_array(10,45, 20,45, 23,48, 20,51, 10,51)),0.05,1,1) as TGEOM From Dual Union All Select T_GEOMETRY(sdo_geometry(2003,NULL,NULL,sdo_elem_info_array(1,1003,3),sdo_ordinate_array(0,0, 10,10)),0.05,1,1) as TGEOM From Dual Union All select t_geometry(sdo_geometry(2003,null,null,sdo_elem_info_array(1,1005,2, 1,2,1, 7,2,2), SDO_ORDINATE_ARRAY (10,128, 10,125, 20,125, 20,128, 15,130, 10,128)),0.05,2,1) as TGEOM From Dual Union All Select T_GEOMETRY(sdo_geometry(2002,null,null,sdo_elem_info_array(1,4,3, 1,2,1, 3,2,2, 7,2,1), sdo_ordinate_array(10,45, 20,45, 23,48, 20,51, 10,51)),0.05,2,1) as TGEOM From Dual ) select a.TGeom.ST_GTYPE() as gtype, a.TGeom.ST_GeometryType() as Geometrytype From Geometries a; GTYPE GEOMETRYTYPE ----- ---------------- 1 ST_POINT 2 ST_LINESTRING 3 ST_POLYGON 3 ST_CURVEPOLYGON 2 ST_COMPOUNDCURVE

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_GType [ Methods ]

NAME

ST_GType-- Returns underlying mdsys.sdo_geometry's geometry type by executing mdsys.sdo_geometry method get_gtype().

SYNOPSIS

Member FunctionST_GTypeReturn INTEGER Deterministic,

DESCRIPTION

Is a wrapper over the mdsys.sdo_geometry get_gtype() method ie SELF.GEOM.Get_Gtype()

RESULT

geometry type (INTEGER) -- 1:Point; 2:Linestring; 3:Polygon; 4:Collection; 5:MultiPoint; 6:MultiLinestring; 7:MultiPolygon

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_hasCircularArcs [ Methods ]

NAME

ST_hasCircularArcs-- A function that tests whether underlying mdsys.sdo_geometry contains circular arcs.

SYNOPSIS

Member FunctionST_hasCircularArcsReturn integer Deterministic,

DESCRIPTION

Examines sdo_elem_info to see if contains ETYPE/Interpretation that describes a circular arc, or even a full circle.

RESULT

BOOLEAN (INTEGER) -- 1 if has circular arcs.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Dec 2008 - Original coding within GEOM package. Simon Greener - Jan 2013 - Recoded for T_GEOMETRY.

COPYRIGHT

## T_GEOMETRY/ST_hasOptimizedRectangles [ Methods ]

NAME

ST_hasOptimizedRectangles-- A function that tests whether underlying mdsys.sdo_geometry contains optimized rectangles.

SYNOPSIS

Member Function ST_hasCircularArcs Return integer Deterministic,

DESCRIPTION

Examines sdo_elem_info to see if contains ETYPE/Interpretation that describes an optimized rectangle. eg SDO_ELEM_INFO_ARRAY(1,1003,3) ie the interpretation value of 3 means optimized rectangle.

RESULT

BOOLEAN (INTEGER) -- 1 if has optimized rectangles.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jun 2011 - Original coding for GEOM package. Simon Greener - Jan 2013 - Recoded for T_GEOMETRY.

COPYRIGHT

## T_GEOMETRY/ST_isMeasured [ Methods ]

NAME

ST_isMeasured-- Tests mdsys.sdo_geometry to see if coordinates include a measure.

SYNOPSIS

Member Function ST_LRS_isMeasured Return INTEGER Deterministic,

DESCRIPTION

Examines SDO_GTYPE (DLNN etc) to see if sdo_gtype has measure ordinate eg 3302 not 3002.

RESULT

BOOLEAN (INTEGER) -- 1 is measure ordinate exists, 0 otherwise.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_IsValid [ Methods ]

NAME

ST_IsValid-- Executes, and returns, result of mdsys.sdo_geometry methodST_IsValid().

SYNOPSIS

Member FunctionST_IsValidReturn INTEGER Deterministic,

DESCRIPTION

Is a wrapper over the mdsys.sdo_geometry method SELF.GEOM.ST_IsValid(). See also SDO_GEOM.VALIDATE_GEOMETRY etc.

RESULT

BOOLEAN (INTEGER) -- If mdsys.sdo_geometry is valid (see SDO_GEOM.VALIDATE_GEOMETRY) returns 1 else 0.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_LineShift (1.0) [ Methods ]

NAME

ST_LineShift -- Moves linestring parallel to imaginary line drawnn from first to last vertex.

SYNOPSIS

Member Function ST_LineShift(p_distance in number) Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic

DESCRIPTION

Function that extracts the first and last vertex of a linestring, compute a snigle fofset at right angles to an imaginary line from first to last vertex, then apply offset to all vertices in the linestring. Is a "simple" versio of the more complex ST_Parallel.

INPUTS

p_distance (NUMBER) - Value +/- integer value.

NOTES

Only supports linestrings.

TODO

Add support for SRID units of measure (ie parameter p_unit).

RESULT

geometry (T_GEOMETRY) -- Input linestring moved parallel by p_distance units

AUTHOR

Simon Greener

HISTORY

Simon Greener - December 2008 - Original coding in GEOM package. Simon Greener - January 2013 - Port/Rewrite to T_GEOMETRY object function member.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Add_Measure [ Methods ]

NAME

ST_LRS_Add_Measure-- Adds measures to 2D (multi)linestring.

SYNOPSIS

Member FunctionST_LRS_Add_Measure(p_start_measure IN NUMBER Default NULL, p_end_measure IN NUMBER Default NULL, p_unit IN VARCHAR2 Default NULL) Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,

DESCRIPTION

Takes a 2D geometry and assigns supplied measures to the start/end vertices and adds proportioned measure values to all vertices in between.

INPUTS

p_start_measure (NUMBER) - Measure defining start point for geometry. p_end_measure (NUMBER) - Measure defining end point for geometry. p_unit (VARCHAR2) - Unit of measure for distance calculations.

RESULT

geometry (T_GEOMETRY) -- Measured geometry

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original Coding.

COPYRIGHT

## T_GEOMETRY/ST_Lrs_Dim [ Methods ]

NAME

ST_Lrs_Dim-- Tests underlying mdsys.sdo_geometry to see if coordinates include a measure ordinate and returns measure ordinate's position.

SYNOPSIS

Member FunctionST_Lrs_DimReturn INTEGER Deterministic,

DESCRIPTION

Examines SDO_GTYPE (DLNN etc) measure ordinate position (L) and returns it.

RESULT

BOOLEAN (INTEGER) -- L from DLNN.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_End_Measure [ Methods ]

NAME

ST_LRS_End_Measure-- Returns M value of last vertex in measured geometry.

SYNOPSIS

Member FunctionST_LRS_End_MeasureReturn &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,

DESCRIPTION

Returns end measure associated with last vertex in a measured line-string. If the line-string is not measured it returns the length of the linestring.

INPUTS

p_unit (VARCHAR2) - Unit of measure for distance calculations.

RESULT

measure (NUMBER) - Measure value of first vertex in a measured line-string: 0 if not measured.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original Coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Find_Measure [ Methods ]

NAME

ST_LRS_Find_Measure-- Snaps input point to measured linestring returning measure value(s)

SYNOPSIS

Member FunctionST_LRS_Find_Measure(p_geom in mdsys.sdo_geometry, p_measureN in integer default 1, p_unit in varchar2 default null) Return mdsys.sdo_ordinate_array Deterministic,

DESCRIPTION

Given a point near a measured linestring, this function returns the measures of all lines that have same distance to the linestring.

INPUTS

p_geom (MDSYS.SDO_GEOMETRY) - Geometry for which a measure is needed. p_measureN (INTEGER) - Particular measure to be returned. 0 = all possible measures, 1 is the first etc. p_unit (VARCHAR2) - Unit of measure for distance calculations.

RESULT

measure (MDSYS.SDO_ORDINATE_ARRAY) -- All measures where more than one is closest to line.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Find_MeasureN [ Methods ]

NAME

ST_LRS_Find_MeasureN-- Returns nominated measure nearest to supplied point if it exists.

SYNOPSIS

Member FunctionST_LRS_Find_MeasureN(p_geom in mdsys.sdo_geometry, p_measureN in integer default 1, p_unit in varchar2 default null) Return mdsys.sdo_ordinate_array Deterministic,

DESCRIPTION

Given a point near a measured linestring, this function returns the nominated measure nearest to that point if it exists. For example, requesting p_measureN=2 may return NULL if only one measure exists that is closest to the linestring at some point.

INPUTS

p_geom (MDSYS.SDO_GEOMETRY) - Geometry for which a measure is needed. p_measureN (INTEGER) - Particular measure to be returned. 1..AllPossibleMeasures p_unit (VARCHAR2) - Unit of measure for distance calculations.

RESULT

measure (NUMBER) - First measure on line closest to point.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Find_Offset [ Methods ]

NAME

ST_LRS_Find_Offset-- Returns smallest (perpendicular) offset from supplied point to the linestring.

SYNOPSIS

Member FunctionST_LRS_Find_Offset(p_geom in mdsys.sdo_geometry, p_unit in varchar2 default null) Return Number Deterministic,

DESCRIPTION

Given a point this function returns the smallest (perpendicular) offset from the point to the line-string.

INPUTS

p_point (MDSYS.SDO_GEOMETRY) - Point geometry for which a measure is needed. p_unit (VARCHAR2) - Unit of measure for distance calculations.

RESULT

offset (NUMBER) - Perpendicular offset distance from point to nearest point on line. Value is negative if on left of line; positive if on right.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Get_Measure [ Methods ]

NAME

ST_LRS_Get_Measure-- The function returns the measure of the T_GEOMETRY point object.

SYNOPSIS

Member FunctionST_LRS_Get_MeasureReturn number deterministic,

DESCRIPTION

Returns the measure value of a measured point. If point 3301, the value of the Z attribute is returned etc.

RESULT

Measure Value (NUMBER) - Measure value of point (ie 3301, 4301, 4401). If n001 returns NULL.

AUTHOR

Simon Greener

HISTORY

Simon Greener - June 2017 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Intersection [ Methods ]

NAME

ST_LRS_Intersection-- Intersects input geometry against measured linestring.

SYNOPSIS

Member FunctionST_LRS_Intersection(P_GEOM In Mdsys.Sdo_Geometry, P_unit in varchar2 default null) Return t_geometry Deterministic,

DESCRIPTION

Takes as input a linestring, multi-linestring, polygon, MultiPolygon or point. SELF must be a measured linestring.

INPUTS

p_geom (MDSYS.SDO_GEOMETRY) - Geometry for which a intersection calculation is needed. p_unit (VARCHAR2) - Oracle Unit of Measure eg unit=M.

RESULT

Geometry (T_GEOMETRY) - Measured Linestring or point

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jul 2017 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Is_Measure_Decreasing [ Methods ]

NAME

ST_LRS_Is_Measure_Decreasing-- Checks if M values decrease in value over all of the linestring.

SYNOPSIS

Member FunctionST_LRS_Is_Measure_DecreasingReturn varchar2 deterministic,

DESCRIPTION

Checks all measures of all vertices in a linestring from start to end. Computes difference between each pair of measures. If all measure differences decrease then TRUE is returned, otherwise FALSE. For non-measured line-strings the value is always FALSE.

RESULT

boolean (VARCHAR2) - TRUE if measures are decreasing, FALSE otherwise.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original Coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Is_Measure_Increasing [ Methods ]

NAME

ST_LRS_Is_Measure_Increasing-- Checks if M values increase in value over all of the linestring.

SYNOPSIS

Member FunctionST_LRS_Is_Measure_IncreasingReturn varchar2 deterministic,

DESCRIPTION

Checks all measures of all vertices in a linestring from start to end. Computes difference between each pair of measures. If all measure differences increase then TRUE is returned, otherwise FALSE. For non-measured line-strings the value is always TRUE.

RESULT

boolean (VARCHAR2) -- TRUE if measures are increasing, FALSE otherwise.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original Coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Is_Shape_Pt_Measure [ Methods ]

NAME

ST_LRS_Is_Shape_Pt_Measure-- Checks if M values increase in value over all of the linestring.

SYNOPSIS

Member FunctionST_LRS_Is_Shape_Pt_Measure(p_measure in number) Return varchar2 deterministic,

DESCRIPTION

Checks all measures of all vertices in a linestring from start to end to see if a measure on a shape vertex has the same measure value as p_measure. Uses measure increasing/decreasing to avoid having to test all vertices in linestring.

RESULT

boolean (VARCHAR2) -- TRUE if measure exists at a shape vertex.

AUTHOR

Simon Greener

HISTORY

Simon Greener - JanJuly7 - Original Coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Locate_Along [ Methods ]

NAME

ST_LRS_Locate_Along-- Wrapper over ST_LRS_Locate_Measure

SYNOPSIS

Member FunctionST_LRS_Locate_Along(p_measure in number, p_offset in number default 0, p_unit in varchar2 default null) Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic

INPUTS

p_measure (NUMBER) - Measure defining point to be located. p_offset (NUMBER) - Offset value left (negative) or right (positive) in p_units. p_unit (VARCHAR2) - Unit of measure for distance calculations when defining snap point

RESULT

point (T_GEOMETRY) - Point at measure/offset.

SEE ALSO

ST_Locate_Measure(p_measure in number, ...) LICENSE Creative Commons Attribution-Share Alike 2.5 Australia License. http://creativecommons.org/licenses/by-sa/2.5/au/

## T_GEOMETRY/ST_LRS_Locate_Between [ Methods ]

NAME

ST_LRS_Locate_Between-- Converts supplied measures into single point or linestring.

DESCRIPTION

Wrapper overST_LRS_Locate_Between

INPUTS

p_start_measure (NUMBER) - Measure defining start point of located geometry. p_end_measure (NUMBER) - Measure defining end point of located geometry. p_offset (NUMBER) - Offset value left (negative) or right (positive) in p_units. p_unit (VARCHAR2) - Unit of measure for distance calculations when defining snap point

RESULT

point (T_GEOMETRY) - Point or Line between start/end measure with offset.

SEE ALSO

ST_Locate_Measures(p_start_measure in number, ...)

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original Coding. LICENSE Creative Commons Attribution-Share Alike 2.5 Australia License. http://creativecommons.org/licenses/by-sa/2.5/au/

## T_GEOMETRY/ST_LRS_Locate_Measure [ Methods ]

NAME

ST_LRS_Locate_Measure-- Returns point geometry at supplied measure along linestring.

SYNOPSIS

Member FunctionST_LRS_Locate_Measure(p_measure in number, p_offset in number default 0, p_unit in varchar2 default null) Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,

DESCRIPTION

Given a measure or length, this function returns a mdsys.sdo_geometry point at that measure or offset the supplied amount.

NOTES

Handles line-strings with reversed measures.

INPUTS

p_measure (NUMBER) - Measure defining point to be located. p_offset (NUMBER) - Offset value left (negative) or right (positive) in p_units. p_unit (VARCHAR2) - Unit of measure for distance calculations when defining snap point

RESULT

point (T_GEOMETRY) - Point at measure/offset.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original Coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Locate_Measures [ Methods ]

NAME

ST_LRS_Locate_Measures-- Converts supplied measures into single point or linestring.

SYNOPSIS

Member FunctionST_LRS_Locate_Measures(p_start_measure in number, p_end_measure in number, p_offset in number default 0, p_unit varchar2 default null) Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,

DESCRIPTION

Given two measures or lengths, this function returns the point defined by those measure (if equal) or a line-string if not. The geometry may be offset the supplied amount.

NOTES

Currently does not handle line-strings with reversed measures.

INPUTS

p_start_measure (NUMBER) - Measure defining start point of located geometry. p_end_measure (NUMBER) - Measure defining end point of located geometry. p_offset (NUMBER) - Offset value left (negative) or right (positive) in p_units. p_unit (VARCHAR2) - Unit of measure for distance calculations when defining snap point

RESULT

point (T_GEOMETRY) - Point at measure/offset.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original Coding. LICENSE Creative Commons Attribution-Share Alike 2.5 Australia License. http://creativecommons.org/licenses/by-sa/2.5/au/

## T_GEOMETRY/ST_LRS_Locate_Point [ Methods ]

NAME

ST_LRS_Locate_Point-- Wrapper over ST_LRS_Locate_Measure

SYNOPSIS

Member FunctionST_LRS_Locate_Point(p_measure in number, p_offset in number default 0) Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,

DESCRIPTION

Given a measure or length, this function returns a mdsys.sdo_geometry point at that measure or offset the supplied amount.

NOTES

Handles line-strings with reversed measures.

INPUTS

p_measure (NUMBER) - Measure defining point to be located. p_offset (NUMBER) - Offset value left (negative) or right (positive) in p_units.

RESULT

point (T_GEOMETRY) - Point at measure/offset.

AUTHOR

Simon Greener

HISTORY

Simon Greener - July 2017 - Original Coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Measure_Range [ Methods ]

NAME

ST_LRS_Measure_Range-- Returns Last Vertex M Value - First Vertex M Value.

SYNOPSIS

Member FunctionST_LRS_Measure_Range(p_unit in varchar2 default null) Return Number deterministic,

DESCRIPTION

Returns end vertex measure value - start vertex measure value. If line-string not measured, returns length of line.

INPUTS

p_unit (VARCHAR2) - Unit of measure for distance calculations.

RESULT

measure (NUMBER) -- Measure range for measured line-string: length if not measured.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original Coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Measure_To_Percentage [ Methods ]

NAME

ST_LRS_Measure_To_Percentage-- Converts supplied M value to percentage of M range.

SYNOPSIS

Member FunctionST_LRS_Measure_To_Percentage(p_measure IN NUMBER DEFAULT 0, p_unit in varchar2 default null) Return Number deterministic,

DESCRIPTION

The end measure minus the start measure of a measured line-string defines the range of the measures (see ST_Measure_Range). The supplied measure is divided by this range and multiplied by 100 to return the measure as a percentage. For non measured line-strings all values are computed using lengths.

INPUTS

p_percentage (NUMBER) - Value between 0 and 100 p_unit (VARCHAR2) - Unit of measure for distance calculations.

RESULT

Percentage (NUMBER) - Value between 0 and 100.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original Coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Percentage_To_Measure [ Methods ]

NAME

ST_LRS_Percentage_To_Measure-- Converts supplied Percentage value to Measure.

SYNOPSIS

Member FunctionST_LRS_Percentage_To_Measure(p_percentage IN NUMBER DEFAULT 0, p_unit in varchar2 default null) Return Number deterministic,

DESCRIPTION

The supplied percentage value (between 0 and 100) is multipled by the measure range (see ST_Measure_Range) to return a measure value between the start and end measures. For non measured line-strings all values are computed using lengths.

INPUTS

p_percentage (NUMBER) - Value between 0 and 100 p_unit (VARCHAR2) - Unit of measure for distance calculations.

RESULT

Measure (NUMBER) - Value between Start Measure and End Measure.

AUTHOR

Simon Greener

HISTORY

## T_GEOMETRY/ST_LRS_Project_Point [ Methods ]

NAME

ST_LRS_Project_Point-- The function uses ST_Snap to snap a point to a linestring(2002) or multi-linestring (2006).

SYNOPSIS

Member FunctionST_LRS_Project_Point(P_Point In Mdsys.Sdo_Geometry, p_unit In varchar2 Default null) Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,

DESCRIPTION

This is a wrapper function for ST_Snap. The function uses ST_Snap to snap a point to a linestring(2002) or multi-linestring (2006). However, where ST_Snap may return more than one result point if p_point was equidistant from two separate vectors/segments of the line-string, ST_Project_Point returns the first.

INPUTS

p_point (MDSYS.SDO_GEOMETRY) - A point(2001) mdsys.sdo_geometry object describing the point for splitting the linestring. p_unit (VARCHAR2) - Unit of measure for distance calculations.

RESULT

snapped_points (T_GEOMETRIES) -- One or more points where supplied point has snapped to the linestring.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Reset_Measure [ Methods ]

NAME

ST_LRS_Reset_Measure-- Wipes all existing assigned measures.

SYNOPSIS

Member FunctionST_LRS_Reset_MeasureReturn &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,

DESCRIPTION

Sets all measures of a measured linesting to null values leaving sdo_gtype alone. So, 3302 remains 3302, but all measures are set to NULL eg Coord 2 of 10.23,5.75,2.65 => 10.23,5.75,NULL

NOTES

This is not the same as ST_To2D which removes measures etc and returns a pure 2D (200x object).

RESULT

linestring (T_GEOMETRY) -- All measures reset

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original Coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Reverse_Measure [ Methods ]

NAME

ST_LRS_Reverse_Measure-- Reverses vertices measures: first becomes last, second becomes second last etc.

SYNOPSIS

Member FunctionST_LRS_Reverse_MeasureReturn &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,

DESCRIPTION

Reverses vertices measures: first becomes last, second becomes second last etc. This is not the same as ST_Reverse_Linestring which reverses xy direction of whole linestring.

RESULT

linestring (T_GEOMETRY) - All measures reversed

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original Coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Scale_Measures [ Methods ]

NAME

ST_LRS_Scale_Measures-- Rescales geometry measures and optionally offsets them, stretching the geometry.

SYNOPSIS

Member FunctionST_LRS_Scale_MeasuresReturn &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,

DESCRIPTION

This function can redistribute measure values between the supplied p_start_measure (start vertex) and p_end_measure (end vertex) by adjusting/scaling the measure values of all in between coordinates. In addition, if p_shift_measure is not 0 (zero), the supplied value is added to each modified measure value performing a translation/shift of those values.

INPUTS

p_start_measure (NUMBER) - Measure defining start point for geometry. p_end_measure (NUMBER) - Measure defining end point for geometry. p_shift_measure (NUMBER) - Unit of measure for distance calculations. RETURN linestring (T_GEOMETRY) - All measures scales.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original Coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Start_Measure [ Methods ]

NAME

ST_LRS_Start_Measure-- Returns M value of first vertex in measured geometry.

SYNOPSIS

Member FunctionST_LRS_Start_MeasureReturn &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,

DESCRIPTION

Returns start measure associated with first vertex in a measured line-string. If the line-string is not measured it returns 0.

RESULT

measure (NUMBER) -- Measure value of first vertex in a measured line-string: 0 if 2D.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original Coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Valid_Geometry [ Methods ]

NAME

ST_LRS_Valid_Geometry-- Checks if underlying LRS linestring is valid.

SYNOPSIS

Member FunctionST_LRS_Valid_Geometry(p_diminfo in mdsys.sdo_dim_array) Return varchar2 Deterministic,

DESCRIPTION

Function returns TRUE string if underlying linestring is a valid LRS linestring and FALSE otherwise. The supplied SDO_DIM_ARRAY must have measure information with a SDO_DIMNAME of M (uppercase) This function checks that the geometry type is measured eg 3302 and has the right number of dimensions (dL0N) The function also checks that sdo_ordinate array has measure values within the range of the supplied diminfo structure.

INPUTS

p_diminfo (mdsys.sdo_dim_array) - DIMINFO structure with a measure sdo_dim_element TOBEDONE Current implementation does NOT examine the supplied diminfo array.

RESULT

TRUE/FASE (string) - TRUE if LRS linestring is Valid, FALSE otherwise.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2017 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Valid_Measure [ Methods ]

NAME

ST_LRS_Valid_Measure-- Checks if supplied measure falls within the linestring's measure range.

SYNOPSIS

Member FunctionST_LRS_Valid_Measure(p_measure in number) Return varchar2 Deterministic,

DESCRIPTION

Function returns TRUE string if measure falls within the underlying linestring's measure range or the FALSE string if the supplied measure does not fall within the measure range.

INPUTS

p_measure (number) - Measure value.

RESULT

TRUE/FASE (string) - TRUE if measure within range, FALSE otherwise.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2017 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Valid_Point [ Methods ]

NAME

ST_LRS_Valid_Point-- Checks if underlying LRS point is valid.

SYNOPSIS

Member FunctionST_LRS_Valid_Point(p_diminfo in mdsys.sdo_dim_array) Return varchar2 Deterministic,

DESCRIPTION

Function returns TRUE string if point is valid and FALSE if point is not valid. A valid LRS point has measure information. It is checkeds for the geometry type (point) and the number of dimensions. The Oracle equivalent for this function requires that "All LRS point data must be stored in the SDO_ELEM_INFO_ARRAY and SDO_ORDINATE_ARRAY, and cannot be stored in the SDO_POINT field in the SDO_GEOMETRY definition of the point", however, this implementation allows for the storage of 3301 Points within the SDO_POINT_TYPE structure.

INPUTS

p_diminfo (mdsys.sdo_dim_array) - DIMINFO structure with a measure sdo_dim_element TOBEDONE Current implementation does NOT examine the supplied diminfo array.

RESULT

TRUE/FASE (string) - TRUE if LRS POint is Valid, FALSE otherwise.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2017 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_LRS_Valid_Segment [ Methods ]

NAME

ST_LRS_Valid_Segment-- Checks if underlying LRS linestring is valid.

SYNOPSIS

Member FunctionST_LRS_Valid_Segment(p_diminfo in mdsys.sdo_dim_array) Return varchar2 Deterministic,

DESCRIPTION

Function returns TRUE string if underlying linestring is a valid LRS linestring and FALSE otherwise. The supplied SDO_DIM_ARRAY must have measure information with a SDO_DIMNAME of M (uppercase) This function only checks that the geometry type is measured eg 3302 and the linestring dims (dL0N)

INPUTS

p_diminfo (mdsys.sdo_dim_array) - DIMINFO structure with a measure sdo_dim_element TOBEDONE Current implementation does NOT examine the supplied diminfo array.

RESULT

TRUE/FASE (string) - TRUE if LRS linestring is Valid, FALSE otherwise.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2017 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_NumElem [ Methods ]

NAME

ST_NumELems -- Returns number of top level elements of the underlying mdsys.sdo_geometry.

SYNOPSIS

Member FunctionST_NumElem() Return Number Deterministic

DESCRIPTION

Wrapper over SDO_UTIL.GETNUMELEM().

EXAMPLE

With GEOMETRIES As ( Select T_GEOMETRY(sdo_geometry(2007,NULL,NULL,sdo_elem_info_array (1,1005,2, 1,2,1, 7,2,2,13,1003,3), sdo_ordinate_array (10,128, 10,125, 20,125, 20,128, 15,130, 10,128, 0,0, 10,10)),0.05,3,1) as TGEOM From Dual Union All Select T_GEOMETRY(sdo_geometry(2002,NULL,NULL,sdo_elem_info_array (1,4,3, 1,2,1, 3,2,2, 7,2,1), sdo_ordinate_array (10,45, 20,45, 23,48, 20,51, 10,51)),0.05,3,1) as TGEOM From Dual ) Select a.TGEOM.ST_NUMELEM() as NumElem From GEOMETRIES a; NUMELEM ------- 2 1

RESULT

Required Element Count (INTEGER)

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2006 - Original coding in GEOM package. Simon Greener - Jan 2013 - Port to T_GEOMETRY object.

COPYRIGHT

## T_GEOMETRY/ST_NumRings [ Methods ]

NAME

ST_NumRings-- Returns Number of Rings of specified type in a polygon/mutlipolygon.

SYNOPSIS

Member FunctionST_NumRingsReturn integer Deterministic,

DESCRIPTION

A polygon can have a single outer ring with no inner rings (holes) or it can have holes. A multipolygon can have multiple outer rings each with/without inner rings. This method counts the number of rings of the desired type as defined by the input parameter.

INPUTS

p_ring_type : integer : 0 - Count all (inner and outer) rings; 1 Count only outer rings; 2 - Count only inner rings.

RESULT

Number Of Rings (INTEGER)

AUTHOR

Simon Greener

HISTORY

Simon Greener - Dec 2008 - Original coding for GEOM package. Simon Greener - Jan 2013 - Port to T_GEOMETRY object.

COPYRIGHT

## T_GEOMETRY/ST_NumSubELems [ Methods ]

NAME

ST_NumSubELems-- Interprets underlying mdsys.sdo_geometry's SDO_ELEM_INFO array returning either total count of elements or just underlying sub-elements.

SYNOPSIS

Member Function ST_NumSubElems(p_subArcs in integer default 0) Return Number Deterministic

DESCRIPTION

If a geometry is coded with an SDO_ELEM_INFO_ARRAY this function will examine the triplets that describe each element and returns one of counts depending on the input parameter. If the input parameter is 0 all elements are counted: For example is a single polygon has a single outer ring (1), but that ring is coded with vertex-connected and circular-arc segments (2), then 1 + 2 =3 is returned. If 1 is the supplied input only the number of sub-elements that describe the outer ring are counted and returned.

EXAMPLE

With geometries as ( select t_geometry(sdo_geometry(2003,null,null, sdo_elem_info_array (1,1005,2, 1,2,1, 7,2,2), sdo_ordinate_array (10,128, 10,125, 20,125, 20,128, 15,130, 10,128)), 0.05,3,1) as tgeom from dual union all select t_geometry(sdo_geometry(2002,null,null, sdo_elem_info_array (1,4,3, 1,2,1, 3,2,2, 7,2,1), sdo_ordinate_array (10,45, 20,45, 23,48, 20,51, 10,51)), 0.05,3,1) as tgeom from dual ) select a.tgeom.ST_GType() as gType, a.tgeom.ST_NumSubElems(0) as allElems, a.tgeom.ST_NumSubElems(1) as lowElems, a.tgeom.ST_NumSubElems(0) - a.tgeom.ST_NumSubElems(1) as TopElems from geometries a; GTYPE ALLELEMS LOWELEMS TOPELEMS ---------- ---------- ---------- ---------- 3 3 2 1 2 4 3 1

RESULT

Required Element Count (INTEGER)

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2006 - Original coding in GEOM package. Simon Greener - Jan 2013 - Port to T_GEOMETRY object.

COPYRIGHT

## T_GEOMETRY/ST_NumVertices [ Methods ]

NAME

ST_NumVertices-- Returns number of vertices (coordinates) in underlying mdsys.sdo_geometry.

SYNOPSIS

Member FunctionST_NumVertices() Return Integer Deterministic,

DESCRIPTION

This function is a wrapper over MdSys.SDO_Util.GetNumVertices(). Returns number of vertices (coordinates) that describe the underlying mdsys.sdo_geometry.

EXAMPLE

With Geometries As ( Select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5))',null),0.05,3,1) as TPolygon From Dual ) select a.TPolygon.ST_NumVertices() as numVertices from GEOMETRIES a; NUMVERTICES ----------- 15

RESULT

number of vertices (Integer) -- For example, if Point(2001), returns 1.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_OneSidedBuffer [ Methods ]

NAME

ST_OneSidedBuffer-- Creates a square buffer to left or right of a linestring.

SYNOPSIS

Member FunctionST_OneSidedBuffer(p_distance in number, p_curved in number default 0, p_unit in varchar2 default null) Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic

DESCRIPTION

This function creates a square buffer to left or right of a linestring.

INPUTS

p_distance (NUMBER) - if < 0 then left side buffer; if > 0 then right sided buffer. p_curved (NUMBER) - 0 = no; 1 = yes for angles in linestring (See ST_Parallel) p_unit (VARCHAR2) - Unit of measure for distance calculations.

RESULT

polygon (T_GEOMETRY) - Result of one sided buffering of a linestring.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_Ord2SdoPoint [ Methods ]

NAME

ST_Ord2SdoPoint-- Changes point encoding from SDO_ELEM_INFO_ARRAY/SDO_ORDINATE_ARRAY to SDO_POINT_TYPE.

SYNOPSIS

FunctionST_Ord2SdoPointReturn &&INSTALL_SCHEMA..T_GEOMETRY Deterministic

DESCRIPTION

Converts underlying point encoded in SDO_ELEM_INFO_ARRAY/SDO_ORDINATE_ARRAY elements to one encoded in SDO_POINT_TYPE element. Gives precidence to measure where exists and point is 4D.

RESULT

SELF (TO_GEOMETRY) -- Oridinal Point with structure changed.

AUTHOR

Simon Greener

HISTORY

Simon Greener, Jul 2017 - New Method.

COPYRIGHT

## T_GEOMETRY/ST_Parallel (1.0) [ Methods ]

NAME

ST_Parallel -- Moves linestring parts of underlying Geometry left (-ve) or right (+ve) depending of distance value.

SYNOPSIS

Member Function ST_Parallel(p_distance in number, p_unit in varchar2 default null) Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic

DESCRIPTION

Function that moves the linestring components of the underlying mdsys.sdo_geometry left/right by a fixed amount. Bends in the linestring, when moved, can remain vertex-connected or be converted to curves. Does not handle situations where supplied distance results in a segment disappearing.

INPUTS

p_distance (NUMBER) - Value +/- integer value. p_curved (INTEGER) - Boolean flag (1/0) indicating whether to stroke bends in line (1=stroke;0=leave alone) when moving segments in direction of obtuse angle. p_unit (VARCHAR2) - Unit of measure for distance calculations.

RESULT

geometry (T_GEOMETRY) -- Input geometry moved parallel by p_distance units

AUTHOR

Simon Greener

HISTORY

Simon Greener - December 2008 - Original coding in GEOM package. Simon Greener - January 2013 - Port/Rewrite to T_GEOMETRY object function member.

COPYRIGHT

## T_GEOMETRY/ST_ParallelSimple (1.0) [ Methods ]

NAME

ST_ParallelSimple

DESCRIPTION

Function under development to replace ST_Parallel do not use.

## T_GEOMETRY/ST_ParallelSimpleZ (1.0) [ Methods ]

NAME

ST_ParallelSimpleZ

DESCRIPTION

Function under development to replace ST_Parallel do not use.

## T_GEOMETRY/ST_Rectangle (1.0) [ Methods ]

NAME

ST_Rectangle -- Creates a rectangle polygon around all point objects within the underlying mdsys.sdo_geometry.

SYNOPSIS

Member Function ST_Rectangle(p_length in number, p_width in number) Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic,

DESCRIPTION

Function that creates a rectangle/polygon geometry around each point in the underlying point/multipoint mdsys.sdo_geometry. As there is no angle parameter, the rectangles are oriented to the XY axes. If the rectangles need to be rotated, consider using ST_Rotate until such time that this function is modified to support angles.

INPUTS

p_length (NUMBER) - +ve value that describes the longest side of the retangle. p_width (NUMBER) - +ve value that describes the shortest side of the retangle.

NOTES

Only supports point or multipoint geometries. If geometry is measured, measure will be lost.

TODO

Add support for rotating the rectangles by adding a p_angle and a p_unit parameter.

RESULT

geometry (T_GEOMETRY) -- (Multi)Polygon geometry where all input vertices are converted to rectangles.

AUTHOR

Simon Greener

HISTORY

Simon Greener - January 2013 - Original Coding.

COPYRIGHT

## T_GEOMETRY/ST_Release [ Functions ]

NAME

ST_Release-- Returns Version Number for the code in the type.

SYNOPSIS

Static FunctionST_ReleaseReturn VarChar2

DESCRIPTION

This function returns a version or release number for the code when distributed. Also includes versions of the databases the code was developed against .

EXAMPLE

SELECT T_GEOMETRY.ST_Release() FROM DUAL; T_GEOMETRY.ST_Release() ----------------------- 2.1.1 Databases(11.2, 12.1)

RESULT

Code Release Number (VARCHAR2) - eg 2.2.1 Databases(11.2, 12.1)

AUTHOR

Simon Greener

HISTORY

Simon Greener - June 2017 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_Reverse_Linestring [ Methods ]

NAME

ST_Reverse_Linestring-- Reverses linestring including multi-linestring.

SYNOPSIS

Member FunctionST_Reverse_LinestringReturn T_GEOMETRY Deterministic,

DESCRIPTION

Reverses linestring including multi-linestring. Honours circular arcs and measures.

RESULT

linestring (T_GEOMETRY) -- Reverse of input Linestring.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_RoundOrdinates [ Methods ]

NAME

ST_RoundOrdinates-- Rounds X,Y,Z and w ordinates to passed in precision.

SYNOPSIS

Member FunctionST_RoundOrdinates(p_dec_places_x in integer default null, p_dec_places_y in integer default null, p_dec_places_z in integer default null, p_dec_places_w in integer default null) Return &&INSTALL_SCHEMA..T_Vertex Deterministic,

DESCRIPTION

Applies relevant decimal digits of precision value to ordinates of mdsys.sdo_geometry. For example: SELF.x := ROUND(SELF.x,p_dec_places_x);

INPUTS

p_dec_places_x (integer) - value applied to x Ordinate. p_dec_places_y (integer) - value applied to y Ordinate. p_dec_places_z (integer) - value applied to z Ordinate. p_dec_places_w (integer) - value applied to w Ordinate.

RESULT

geometry (T_GEOMETRY)

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_SDO_GType [ Methods ]

NAME

ST_SDO_GType-- Returns underlying mdsys.sdo_geometry's SDO_GTYPE attribute.

SYNOPSIS

Member FunctionST_SDO_GTypeReturn INTEGER Deterministic,

DESCRIPTION

Is a wrapper over the mdsys.sdo_geometry SELF.GEOM.SDO_GTYPE attribute.

RESULT

geometry type (INTEGER) -- eg 2001 for 2D single point etc.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_SdoPoint2Ord [ Methods ]

NAME

ST_SdoPoint2Ord-- Changes point encoding from SDO_POINT_TYPE to SDO_ELEM_INFO_ARRAY/SDO_ORDINATE_ARRAY.

SYNOPSIS

FunctionST_SdoPoint2OrdReturn &&INSTALL_SCHEMA..T_GEOMETRY Deterministic

DESCRIPTION

Converts underlying Point encoded in SDO_POINT_TYPE structure to one encoded in sdo_elem_info_array/sdo_ordinate_array elements. Honours any measure

RESULT

SELF (TO_GEOMETRY) -- Oridinal Point with structure changed.

AUTHOR

Simon Greener

HISTORY

Simon Greener, Jan 2013 - Port to Object method.

COPYRIGHT

## T_GEOMETRY/ST_SetPrecision [ Functions ]

NAME

ST_SetPrecision-- Sets precision property value of object after construction.

SYNOPSIS

Member ProcedureST_SetPrecision(p_precision in integer default 3),

DESCRIPTION

The precision object property is normally set when the object is constructed. This member function allows the user to change the value dynamically.

INPUTS

p_precision : integer : Any valid integer value for the Oracle ROUND function.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jun 2017 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_SetProjection [ Functions ]

NAME

ST_SetProjection-- Sets projected property of object after query of MDSYS CS metadata.

SYNOPSIS

Member ProcedureST_SetProjection(SELF in out &&INSTALL_SCHEMA..T_GEOMETRY),

DESCRIPTION

The projected object property is used by the methods of the T_GEOMETRY object when executing SDO functions that require knowledge of whether the mdsys.sdo_geometry is coordinate system is projected or geodetic. If the property is not set by a constructor, on instantiation, this function can be used to set that property at any time.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_SetSdoGtype [ Functions ]

NAME

ST_SetSdoGtype-- Sets SDO_GTYPE for underlying geometry object.

SYNOPSIS

Member FunctionST_SetSdoGtype(p_sdo_gtype in integer),

DESCRIPTION

If the SDO_GTYPE property is not set by a constructor on instantiation, this Function can be used to set that property at any time.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jul 2017 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_SetSRID [ Functions ]

NAME

ST_SetSRID-- Sets SDO_SRID for underlying geometry object.

SYNOPSIS

Member FunctionST_SetSRID(SELF in out &&INSTALL_SCHEMA..T_GEOMETRY),

DESCRIPTION

If the SDO_SRID property is not set by a constructor on instantiation, this Function can be used to set that property at any time.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jul 2017 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_SetTolerance [ Functions ]

NAME

ST_SetTolerance-- Sets tolerance value of object after construction.

SYNOPSIS

Member ProcedureST_SetTolerance(p_tolerance in integer default 0.05),

DESCRIPTION

The tolerance object property is normally set when the object is constructed. This member function allows the user to change the value dynamically.

INPUTS

p_tolerance : number : Any valid Oracle Spatial tolerance. Default is 5cm as per geodetic value.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jun 2017 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_SmoothTile (1.0) [ Methods ]

NAME

ST_SmoothTile -- Smoothly polygon created from raster to vector conversion

SYNOPSIS

Member Function ST_SmoothTile Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic

DESCRIPTION

A polygon created from raster to vector conversion, will have many vertices falling along the same straight line. And whose sides will be "stepped". This function removes coincident points on a side so that a side will be defined by only a start and end vertex. The stepped sies will be replaced with vertices in the midpoint of each step so that any consistent stepped side will be replaced by a single line.

NOTES

Only supports polygons and multipolygons.

RESULT

geometry (T_GEOMETRY) -- Grid shaped polygon replaced by polygons with straight sides.

AUTHOR

Simon Greener

HISTORY

Simon Greener - January 2013 - Original Coding

COPYRIGHT

## T_GEOMETRY/ST_Snap [ Methods ]

NAME

ST_Snap-- The function snaps a point to a linestring(2002) or multi-linestring (2006).

SYNOPSIS

Member FunctionST_Snap(p_point in mdsys.sdo_geometry, p_unit in varchar2 default null) Return &&INSTALL_SCHEMA..T_GEOMETRIES Deterministic,

DESCRIPTION

The function snaps a point to a linestring(2002) or multi-linestring (2006). More than one result point may be returned if p_point was equidistant from two separate vectors/segments of the line-string.

INPUTS

p_point (MDSYS.SDO_GEOMETRY) - A point(2001) mdsys.sdo_geometry object describing the point for splitting the linestring. p_unit (VARCHAR2) - Unit of measure for distance calculations.

RESULT

snapped_points (T_GEOMETRIES) -- One or more points where supplied point has snapped to the linestring.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_Split [ Methods ]

NAME

ST_Split-- Splits linestring or multi-linestring object at closest point on linestring to supplied T_Vertex.

SYNOPSIS

Member FunctionST_Split(p_vertex in &&INSTALL_SCHEMA..T_Vertex, p_unit in varchar2 default null) Return &&INSTALL_SCHEMA..T_GEOMETRIES Deterministic,

DESCRIPTION

Using supplied point, this function splits a linestring or multi-linestring object at its closest point on linestring. Since the closest point may occur more than once, multiple linestrings may be returned. Normally the point should lie on the linestring at a vertex or between two vertices but the algorithm used will split a line even if the point does not lie on the line. Where the point does not lie on the linestring the algorithm approximates the nearest point on the linestring to the supplied point and splits it there: the algorithm is ratio based and will not necessarily be accurate for geodetic data. The function supports linestrings with circular arcs.

INPUTS

p_point (MDSYS.SDO_GEOMETRY) - A point(2001) mdsys.sdo_geometry object describing the point for splitting the linestring. p_unit (VARCHAR2) - Unit of measure for distance calculations.

RESULT

geometry (T_GEOMETRIES) - One or more geometry objects.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_Split (Measure Overload) [ Methods ]

NAME

ST_Split -- Splits linestring or multi-linestring object at measure point.

SYNOPSIS

Member Function ST_Split (p_measure in number, p_unit in varchar2 DEFAULT null) Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,

DESCRIPTION

Wrapper member function allowing split point to be determined by a measure

SEE ALSO

ST_Split(p_vetex in T_VERTEX...);

INPUTS

p_measure (NUMBER) - Measure defining split point. p_unit (VARCHAR2) - Unit of measure for distance calculations.

RESULT

geometry (T_GEOMETRIES) - One or more geometry objects.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Apr 2014 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_Split (SDO_GEOMETRY Overload) [ Methods ]

NAME

ST_Split -- Splits linestring or multi-linestring object at closest point on linestring to supplied point mdsys.sdo_geometry.

SYNOPSIS

Member Function ST_Split (p_point in mdsys.sdo_geometry, p_unit in varchar2 DEFAULT null) Return &&INSTALL_SCHEMA..T_GEOMETRIES Deterministic,

DESCRIPTION

Wrapper member function allowing mdsys.sdo_geometry 2001 point rather than T_Vertex.

SEE ALSO

ST_Split(p_vertex in T_VERTEX...);

INPUTS

p_point (MDSYS.SDO_GEOMETRY) - A point used to split the linestring. p_unit (VARCHAR2) - Unit of measure for distance calculations.

RESULT

geometry (T_GEOMETRIES) - One or more geometry objects.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2014 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_Split_Vectors [ Methods ]

NAME

ST_Split_Vectors-- Splits geometry at nearest point on the geometry to supplied vertex.

SYNOPSIS

Member FunctionST_Split_Vectors(p_vertex in &&INSTALL_SCHEMA..T_Vertex, p_unit in varchar2 DEFAULT null, p_pairs in integer DEFAULT 0) Return &&INSTALL_SCHEMA..T_Vectors Deterministic,

DESCRIPTION

Using supplied vertex, the geometry is split at the nearest point on the geometry. Normally the vertex should lie on the linestring at a specific vertex or between two vertices but the algorithm used will split a line even if the supplied vertex does not lie on the line. Where the point does not lie on the linestring the algorithm approximates the nearest point on the linestring to the supplied point and splits it there. Where a linestring splits an existing vector between two vertices, two halfs of the vector are returned. If the split point is at an exact vertex the vector before and after are returned. If the linestring is split at the start, the previous vector returned is null, and for the end point the second vector returns is null. Two vectors are always returned. Since the closest point may occur more than once because the supplied vertex is perfectly between two line-string vectors all possible results are returned. The first pair occurs earlier in the linestring than the later ones. If p_pairs is set to 0, only the first split vectors are returned. The algorithm is ratio based and will not necessarily be accurate for geodetic data. The function supports linestrings with circular arcs.

INPUTS

p_vertex (T_VERTEX) - A vertex point used to split the linestring. p_unit (VARCHAR2) - Unit of measure for distance calculations. p_pairs (INTEGER) - 0 : Return first split point's vectors if more than one exists; 1 : Return all split point vectors.

RESULT

vectors (T_VECTORS) - One or more vector objects.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding. DEPRECATED April 30th. Use ...

## T_GEOMETRY/ST_Split_Vectors (SDO_GEOMETRY Overload) [ Methods ]

NAME

ST_Split_Vectors -- Splits geometry at nearest point to supplied mdsys.sdo_geometry 2001 point.

SYNOPSIS

Member Function ST_Split_Vectors (p_point in mdsys.sdo_geometry, p_unit in varchar2 DEFAULT null, p_pairs in integer DEFAULT 0) Return &&INSTALL_SCHEMA..T_Vectors Deterministic,

DESCRIPTION

Wrapper member function allowing mdsys.sdo_geometry 2001 point rather than T_Vertex.

SEE ALSO

ST_Split_Vectors(p_vertex t_vertex...);

INPUTS

p_point (MDSYS.SDO_GEOMETRY) - A point used to split the linestring. p_unit (VARCHAR2) - Unit of measure for distance calculations. p_pairs (INTEGER) - 0 : Return first split point's vectors if more than one exists; 1 : Return all split point vectors.

RESULT

vectors (T_VECTORS) - One or more vector objects.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

(c) 2012-2017 by TheSpatialDBAdvisor/Simon Greener DEPRECATED April 30th. Use .... LICENSE Creative Commons Attribution-Share Alike 2.5 Australia License. http://creativecommons.org/licenses/by-sa/2.5/au/

## T_GEOMETRY/ST_SquareBuffer [ Methods ]

NAME

ST_SquareBuffer-- Creates a square buffer around (multi)linestrings.

SYNOPSIS

Member FunctionST_SquareBuffer(p_distance in number, p_curved in number default 0, p_unit in varchar2 default null) Return &&INSTALL_SCHEMA..T_GEOMETRY deterministic

DESCRIPTION

This function creates a square buffer around all linestrings in an object. A negative buffer is not possible.

INPUTS

p_distance (NUMBER) - value > 0.0 p_curved (NUMBER) - 0 = no; 1 = yes for angles in linestring (See ST_Parallel) p_unit (VARCHAR2) - Unit of measure for distance calculations.

RESULT

polygon (T_GEOMETRY) - Result of square buffering linestrings

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_SRID [ Methods ]

NAME

ST_SRID-- Returns underlying mdsys.sdo_geometry's SDO_SRID attribute.

SYNOPSIS

Member FunctionST_SRIDReturn INTEGER Deterministic,

DESCRIPTION

Is a wrapper over the mdsys.sdo_geometry SELF.GEOM.SDO_SRID attribute.

RESULT

spatial reference id (INTEGER) -- eg 8311 etc.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_To2D [ Methods ]

NAME

ST_To2D-- Converts underlying 3D or 4D mdsys.sdo_geometry to 2D (xy).

SYNOPSIS

Member FunctionST_To2DReturn &&INSTALL_SCHEMA..T_GEOMETRY Deterministic

DESCRIPTION

This Function checks if underlying mdsys.sdo_geometry is 2D and returns unchanged. If mdsys.sdo_geometry has more than xy ordinates (ie xyz or xym or xyzm) the geometry is stripped of its non-xy ordinates, returning a 2D mdsys.sdo_geometry with only XY ordinates.

RESULT

SELF (TO_GEOMETRY) -- With 2D Underlying mdsys.sdo_geometry.

AUTHOR

Simon Greener

HISTORY

Albert Godfrind, July 2006, Original Coding Bryan Hall, July 2006, Modified to handle points Simon Greener, July 2006, Integrated into geom with GF. Simon Greener, Aug 2009, Removed GF; Modified Byan Hall's version to handle compound elements. Simon Greener, Jan 2013 - Port to Object method.

COPYRIGHT

## T_GEOMETRY/ST_To3D [ Methods ]

NAME

ST_To3D-- Converts underlying 2D or 4D geometry to a 3D geometry.

SYNOPSIS

Member FunctionST_To3D(p_start_z IN NUMBER, p_end_z IN NUMBER, p_unit IN varchar2 default null) Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic

DESCRIPTION

If underlying mdsys.sdo_geometry object is a 2D line, it converts it to 3D with suypplied start and end measures. If mdsys.sdo_geometry is 4D it is reduced to 3D with measures reset to supplied start and end values ie result is XYW.

RESULT

SELF (TO_GEOMETRY) -- 3D mdsys.sdo_geometry line encoded with start and end measures.

AUTHOR

Simon Greener

HISTORY

Simon Greener, May 2007 Original coding in GEOM package. Simon Greener, Aug 2009 Added support for interpolating Z values Simon Greener, Jan 2013 - Port to Object method.

COPYRIGHT

## T_GEOMETRY/ST_To3D [ Methods ]

NAME

ST_To3D-- Converts underlying 2D or 4D geometry to a 3D geometry.

SYNOPSIS

Member FunctionST_To3D(p_zordtokeep IN INTEGER) Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic

DESCRIPTION

This Function checks if underlying mdsys.sdo_geometry is 2D, converts it to 3D with NULL Z ordinates. If mdsys.sdo_geometry is 4D it is reduced to 3D with p_zordtokeep indicating which non-2D ordinate to keep eg if 4 then result is XYW; if 3 then XYZ.

RESULT

SELF (TO_GEOMETRY) -- 3D Underlying mdsys.sdo_geometry.

AUTHOR

Simon Greener

HISTORY

Simon Greener, May 2007 Original coding in GEOM package. Simon Greener, Aug 2009 Added support for interpolating Z values Simon Greener, Jan 2013 - Port to Object method.

COPYRIGHT

## T_GEOMETRY/ST_To3D [ Methods ]

NAME

ST_FixZ -- Replaces and measure/elevation NULL values with supplied value eg -9999

SYNOPSIS

Member Function ST_FixZ(p_default_z IN NUMBER := -9999 ) Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic

DESCRIPTION

It is not uncommon to see linear geometries having a Z or W/M value encoded as NULL while others have numeric values. This function allows for the replacement of the NULL values with a provided value.

RESULT

SELF (TO_GEOMETRY) -- Corrected mdsys.sdo_geometry object.

AUTHOR

Simon Greener

HISTORY

Simon Greener, May 2007 Original coding in GEOM package. Simon Greener, Aug 2009 Added support for interpolating Z values Simon Greener, Jan 2013 - Port to Object method.

COPYRIGHT

## T_GEOMETRY/ST_Vectorize [ Methods ]

NAME

ST_Vectorize-- Extracts all vectors from the underlying linear or polygon geometry.

SYNOPSIS

Member FunctionST_Vectorize() Return &&INSTALL_SCHEMA..T_Vectors Pipelined

DESCRIPTION

Extracts all vectors from the underlying linear or polygon geometry, and outputs them as a pipelined set of T_Vector objects. This function honours the underlying structure of the geometry and handles circular curve elements.

EXAMPLE

With geometries As ( Select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5))',null), 0.05,3,1) as tPolygon From dual ) Select t.ST_AsText(2) from GEOMETRIES a, Table(a.tPolygon.ST_Vectorize()) t; T.ST_ASTEXT(2) ------------------------------------- T_Vertex(0,0,NULL,NULL,1,2001,NULL) T_Vertex(20,0,NULL,NULL,2,2001,NULL) T_Vertex(20,20,NULL,NULL,3,2001,NULL) T_Vertex(0,20,NULL,NULL,4,2001,NULL) T_Vertex(0,0,NULL,NULL,5,2001,NULL) T_Vertex(10,10,NULL,NULL,6,2001,NULL) T_Vertex(10,11,NULL,NULL,7,2001,NULL) T_Vertex(11,11,NULL,NULL,8,2001,NULL) T_Vertex(11,10,NULL,NULL,9,2001,NULL) T_Vertex(10,10,NULL,NULL,10,2001,NULL) T_Vertex(5,5,NULL,NULL,11,2001,NULL) T_Vertex(5,7,NULL,NULL,12,2001,NULL) T_Vertex(7,7,NULL,NULL,13,2001,NULL) T_Vertex(7,5,NULL,NULL,14,2001,NULL) T_Vertex(5,5,NULL,NULL,15,2001,NULL) 15 rows selected

RESULT

Vectors (T_VECTOR) -- Table (T_VECTORS) of T_VECTOR objects.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_Vertices [ Methods ]

NAME

ST_Vertices-- Extracts all vertices of the underlying geometry, and outputs them as a pipelined set of T_Vertex objects.

SYNOPSIS

Member FunctionST_Vertices() Return &&INSTALL_SCHEMA..T_VERTICES Pipelined

DESCRIPTION

This function allows a user to extract all the vertices of the underlying geometry as a set of T_VERTEX objects.

EXAMPLE

With geometries As ( Select T_GEOMETRY(sdo_geometry('POLYGON((0 0,20 0,20 20,0 20,0 0),(10 10,10 11,11 11,11 10,10 10),(5 5,5 7,7 7,7 5,5 5))',null), 0.05,3,1) as tPolygon From dual ) Select t.ST_AsText(2) from GEOMETRIES a, Table(a.tPolygon.ST_Vertices()) t; T.ST_ASTEXT(2) ------------------------------------- T_Vertex(0,0,NULL,NULL,1,2001,NULL) T_Vertex(20,0,NULL,NULL,2,2001,NULL) T_Vertex(20,20,NULL,NULL,3,2001,NULL) T_Vertex(0,20,NULL,NULL,4,2001,NULL) T_Vertex(0,0,NULL,NULL,5,2001,NULL) T_Vertex(10,10,NULL,NULL,6,2001,NULL) T_Vertex(10,11,NULL,NULL,7,2001,NULL) T_Vertex(11,11,NULL,NULL,8,2001,NULL) T_Vertex(11,10,NULL,NULL,9,2001,NULL) T_Vertex(10,10,NULL,NULL,10,2001,NULL) T_Vertex(5,5,NULL,NULL,11,2001,NULL) T_Vertex(5,7,NULL,NULL,12,2001,NULL) T_Vertex(7,7,NULL,NULL,13,2001,NULL) T_Vertex(7,5,NULL,NULL,14,2001,NULL) T_Vertex(5,5,NULL,NULL,15,2001,NULL) 15 rows selected

RESULT

vertices (T_VERTICES) -- Table of T_Vertex objects.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_Which_Side [ Methods ]

NAME

ST_Which_Side-- Returns the side the supplied point lies on.

SYNOPSIS

Member FunctionST_Which_Side(p_point in mdsys.sdo_geometry, p_unit in varchar2 default null) Return &&INSTALL_SCHEMA..T_GEOMETRY Deterministic,

DESCRIPTION

Given a point this function returns the side the point lies on. Wrapper over ST_Find_Offset

SEE ALSO

ST_Find_Offset(p_point in mdsys.sdo_geometry...);

INPUTS

p_point (MDSYS.SDO_GEOMETRY) - Point geometry for which a measure is needed. p_unit (VARCHAR2) - Unit of measure for distance calculations.

RESULT

side (VARCHAR2) - L if negative offset; R is positive offset; O if on line.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_WKB [ Methods ]

NAME

ST_WKB-- Exports mdsys.sdo_geometry object to its Well Known Binary (WKB) representation by executing, and returning, result of mdsys.sdo_geometry method get_wkb().

SYNOPSIS

Member FunctionST_WKBReturn INTEGER Deterministic,

DESCRIPTION

Is a wrapper over the mdsys.sdo_geometry method SELF.GEOM.GET_WKB(). Returns Well Known Binary representation of underlying mdsys.sdo_geometry.

RESULT

WKB (BLOB) -- eg Well Known Binary encoding of mdsys.sdo_geometry object.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/ST_WKT [ Methods ]

NAME

ST_WKT-- Exports mdsys.sdo_geometry object to its Well Known Text (WKT) representation by executing, and returning, result of mdsys.sdo_geometry method get_wkt().

SYNOPSIS

Member FunctionST_WKTReturn INTEGER Deterministic,

DESCRIPTION

Is a wrapper over the mdsys.sdo_geometry method SELF.GEOM.GET_WKT(). Returns Well Known Text representation of underlying mdsys.sdo_geometry.

RESULT

WKT (CLOB) -- eg Well Known Text encoding of mdsys.sdo_geometry object.

AUTHOR

Simon Greener

HISTORY

Simon Greener - Jan 2013 - Original coding.

COPYRIGHT

## T_GEOMETRY/TYPE VARIABLES [ Variables ]

WARNINGS

This type should only be used for programming and should not be stored in the database.

DESCRIPTION

geom -- mdsys.sdo_geometry Object tolerance -- Standard SDO_TOLERANCE value. Since we need the geometry's tolerance for some operations eg sdo_area etc let's add it to the type rather than have to supply it all the time to member functions precision -- Number of Significant Decimal Digits of precision. Some operations require the comparison of two ordinates. For geodetic data this is not the same as an Oracle tolerance. We allow a user to supply this value for all data but if set to null it will assume a value based on the tolerance. projected -- Whether mdsys.sdo_geometry ordinates are Geodetic (0), Projected (1), or NULL (not defined). When creating and using bearing and distances one needs to know if the geometry is projected or not. While one could do this by dynamic query to the database each time it is needed, an additional property helps us to record this once.

SOURCE

geom mdsys.sdo_geometry, tolerance number, precision number, projected integer,