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    Implementation Of Travelling Salesman Problem
    Create Polygon From Bearings And Distances
    Function That Returns a Compass Point From a Whole Circle Bearing
    Playing around with Centroids by using different seed values
    GeoRaptor 4.x Update 2
    Simple Oracle C Sprintf or Java String.format
    Some Oriented Point Functions
    Extracting Inner Rings Changed Ordinate Ordering: A Trap For Players Who Don't Read Documentation!
    PLS-00306: wrong number or types of arguments in call to 'SDO_GEOMETRY'
    Converting Google Earth Formatted Longitude/Latitude points to decimal degrees
    Oracle Business Intelligence Warehousing and Analytics - Spatial Summit
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    Analyzing Spatial Query Performance Improvements in Oracle Spatial and Graph 12c Through Cross-Vendor Comparison
    ST_VertexN / ST_PointN - Extracting a specific point from any geometry
    Convert Single Point stored in SDO_ORDINATES to SDO_POINT_TYPE
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    Circular Arcs in Geodetic Polygons
    Some SDO_GEOMETRY/DIMINFO handling functions
    Applying And Extending Oracle Spatial - Book Released
    Changing all DIMINFO sdo_tolerance values for all metadata records in one go.
    Building Polygons from Incomplete Linestrings using ST_PolygonBuilder
    Computing Cardinal Directions to nearby geometries
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    Spatial and Oracle 12c
    Update Triggers and SDO_GEOMETRY Equality
    Duplicate Geometry data and Data Models
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    Creating linestrings from points
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    Effects of Sdo_Geometry Ordinate Precision on Performance
    Effects of Sdo_Geometry Ordinate Precision on Storage
    The Spatial filtering of geometries: The effect of tolerances on relationships
    Application of Delaunay Triangulation and Inverse Distance Weighting (IDW) in Oracle for Soils Interpolation
    Selecting all SDO_GTYPE values for all tables/sdo_geometry columns in a schema
    CENTROID package - Tips for Use
    Announcing the Spatial Companion For Oracle (SC4O)
    Filtering Rings (Oracle Spatial)
    Splitting a polygon using one or more linestrings
    isValid, isSimple, Dimension and CoordDim methods for SDO_Geometry
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    3D/4D and SRID aware Conversion functions for SDO_Geometry: WKT and EWKT
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    Filtering very short linestrings via bitmap function index
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    Gridding a sdo_geometry line/polygon object (Oracle)
    Finding centre and radius of a circular geometry
    Constraining geometry type for sdo_geometry column in a table.
    CASE Statements and SDO_GEOMETRY
    The Power of Constraints and Indexes for Spatial Constraints: stopping duplicate points
    Replacement for SDO_GEOM.RELATE - ST_Relate based on JTS
    Changing Oracle Spatial Index Parameters on existing index
    Writing Excel Spreadsheets files from within the Oracle database using Java and PL/SQL
    Writing xSV (eg csv) files from within the Oracle database using Java and PL/SQL
    A simple spike finder for Spatial/Locator
    JTS Java class compilation for 11g and above
    Random Spatial Search Procedure
    Geometry Snapping using JTS in Oracle
    Exposing JTS's MinimumBoundingCircle functionality
    Exposing JTS's Densifier functionality
    Using JTS's Comparison Functions - HausdorffSimilarityMeasure & AreaSimilarityMeasure with SDO_GEOMETRY
    Free JTS-based Area/Length Functions
    Handy way of systematically fixing polygon geometries with 13349 and other errors
    Standalone CENTROID package now available for download
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    Configurable Buffer: JTS and Oracle
    Free Union, Intersection, Xor and Difference Functions for Oracle Locator - Part 3
    Free Union, Intersection, Xor and Difference Functions for Oracle Locator - Part 2
    Free Union, Intersection, Xor and Difference Functions for Oracle Locator - Part 1
    Building Lines into Polygons in Oracle Locator / Spatial
    Finding Intersection Points between Line and Polygon
    SDO2GeoJSON
    Free version of sdo_length
    Alternative to my SQL based GetNumRings function
    External Tables and SDO_Geometry data.
    layer_gtype keyword issue when indexing linear data on 11g
    String Tokenizer for Oracle
    Free Aggregate Method for Concatenating 2D Lines in Oracle Locator 10g
    Reducing 5 Vertex Polygon to Optimized Rectangle
    Square Buffer
    Converting decimal seconds to string
    SDO_GEOM.VALIDATE_GEOMETRY_WITH_CONTEXT - 13356 Issues
    Valid conversion unit values for Oracle sdo_geom.sdo_length()
    Removing Steps in Gridded Vector Data - SmoothGrid for Oracle
    Oracle Spatial DISJOINT search/filtering
    Creating SDO_Geometry from geometric data recorded in the columns of a table
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    Projecting SDO_GEOM_METADATA DIMINFO XY ordinates
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    GeoRaptor Development Team
    Fast Refreshing Materialized View Containing SDO_GEOMETRY and SDO_GEOM.SDO_AREA function
    Performance of PL/SQL Functions using SQL vs Pure Code
    Implementing the BEST VicGrid Projection in Oracle 10gR2
    Making Sdo Geometry Metadata Update Generic Code
    ORA-13011 errors when using SDO_GEOM.VALIDATE_LAYER_WITH_CONTEXT()
    Extract Polygons from Compound Polygon
    Detecting sdo_geometries with compound (3-point Arcs) segments
    GEOMETRY_COLUMNS for Oracle Spatial
    Convert GML to SDO_Geometry in Oracle 10gR2
    Spatial Sorting of Data via Morton Key
    Swapping Ordinates in an SDO_GEOMETRY object
    New To_3D Function
    Extend (Reduce/Contract/Skrink) Function for Oracle
    Loading and Processing GPX 1.1 files using Oracle XMLDB
    Loading Spatial Data from an external CSV file in Oracle
    Calling the Oracle Spatial shapefile loader from within the Oracle database itself
    Implementing SDO_VertexUpdate/ST_VertexUpdate for Oracle
    Implementing SDO_RemovePoint/ST_RemovePoint for Oracle
    Implementing SDO_AddPoint/ST_AddPoint for Oracle
    ESRI ArcSDE Exverted and Inverted Polygons and Oracle Spatial
    Funky Fix Ordinates By Formula
    Implementing a SetPoint/ST_SetPoint function in Oracle
    Implementing an ST_SnapToGrid (PostGIS) function for Oracle Spatial
    Generating random point data
    Implementing an Affine/ST_Affine function for Oracle Spatial
    Implementing a Scale/ST_Scale function for Oracle Spatial
    Implementing a Parallel/ST_Parallel function for linestring data for Oracle Spatial
    Implementing a Rotate/ST_Rotate function for Oracle Spatial
    Limiting table list returned when connecting to Oracle Database using ODBC
    ST_Azimuth for Oracle: AKA Cogo.Bearing
    Implementing a Translate/ST_Translate/Move function for Oracle Spatial
    Elem_Info_Array Processing: An alternative to SDO_UTIL.GetNumRings and querying SDO_ELEM_INFO itself
    Minumum Bounding Rectangle (MBR) Object Type for Oracle
    How to extract elements from the result of an sdo_intersection of two polygons.
    How to restart a database after failed parameter change
    Fixing failed spatial indexes after import using data pump
    generate_series: an Oracle implementation in light of SQL Design Patterns
    Multi-Centroid Shootout
    Oracle Spatial Centroid Shootout
    On the use of ROLLUP in Oracle SELECT statements
    Surrounding Parcels
    Spatial Pipelining
    Using Oracle's SDO_NN Operator - Some examples
    Converting distances and units of measure in Oracle Locator
    Split Sdo_Geometry Linestring at a known point
    Forcing an Sdo_Geometry object to contain only points, lines or areas
    Unpacking USER_SDO_GEOM_METADATA's DIMINFO structure using SQL
    Generating multi-points from single point records in Oracle Spatial
    Object Tables of Sdo_Geometry
    Oracle Locator vs Oracle Spatial: A Reflection on Oracle Licensing of the SDO_GEOM Package
    FAST REFRESHing of Oracle Materialized Views containing Sdo_Geometry columns
    Australian MGA/AMG Zone Calculation from geographic (longitude/latitude) data
    Loading Shapefiles (SHP) into Oracle Spatial
    Oracle Spatial Mapping and Map Rendering Performance Tips
    The significance of sdo_lb/sdo_ub in USER_SDO_GEOM_METDATA: Do I need it?
    Oracle Spatial Forum - Melbourne April 2007
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All Blog Articles, Data Models and Free Source Code by Simon Greener, The SpatialDB Advisor is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.

Function That Returns a Compass Point From a Whole Circle Bearing

Thursday March 03 2016 at 16:35

Keywordscompass point whole circle bearing function oracle
Summary

Thsi article shows how to create a compass point from a whole circle bearing.

I needed to create a function that returns a compass point from a whole circle bearing.

Here is that function for Oracle users.

  1.   /**Compass point  Ordinal direction abbreviations Clock face direction
  2.     * North N
  3.     * North-NorthEast NNE
  4.     * NorthEast NE
  5.     * East-NorthEast  ENE
  6.     * East  E
  7.     * East-SouthEast  ESE
  8.     * SouthEast SE
  9.     * South-SouthEast SSE
  10.     * South S
  11.     * South-SouthWest SSW
  12.     * SouthWest SW
  13.     * West-SouthWest  WSW
  14.     * West  W
  15.     * West-NorthWest  WNW
  16.     * NorthWest NW
  17.     * North-NorthWest NNW
  18.     *
  19.   **/
  20.   FUNCTION CompassPoint(p_bearing      IN NUMBER,
  21.                         p_abbreviation IN INTEGER DEFAULT 1)
  22.     RETURN varchar2
  23.   AS
  24.     v_bearing NUMBER;
  25.   BEGIN
  26.     IF ( p_bearing IS NULL ) THEN
  27.       RETURN NULL;
  28.     END IF;
  29.     v_bearing := round(abs(p_bearing),2);
  30.     RETURN CASE WHEN NVL(p_abbreviation,1) <> 0
  31.                 THEN CASE WHEN v_bearing BETWEEN   0.00 AND  11.25 THEN 'North'
  32.                           WHEN v_bearing BETWEEN  11.25 AND  33.75 THEN 'North-NorthEast'
  33.                           WHEN v_bearing BETWEEN  33.75 AND  56.25 THEN 'NorthEast'
  34.                           WHEN v_bearing BETWEEN  56.25 AND  78.75 THEN 'East-NorthEast'
  35.                           WHEN v_bearing BETWEEN  78.75 AND 101.25 THEN 'East'
  36.                           WHEN v_bearing BETWEEN 101.25 AND 123.75 THEN 'East-SouthEast'
  37.                           WHEN v_bearing BETWEEN 123.75 AND 146.25 THEN 'SouthEast'
  38.                           WHEN v_bearing BETWEEN 146.25 AND 168.75 THEN 'South-SouthEast'
  39.                           WHEN v_bearing BETWEEN 168.75 AND 191.25 THEN 'South'
  40.                           WHEN v_bearing BETWEEN 191.25 AND 213.75 THEN 'South-SouthWest'
  41.                           WHEN v_bearing BETWEEN 213.75 AND 236.25 THEN 'SouthWest'
  42.                           WHEN v_bearing BETWEEN 236.25 AND 258.75 THEN 'West-SouthWest'
  43.                           WHEN v_bearing BETWEEN 258.75 AND 281.25 THEN 'West'
  44.                           WHEN v_bearing BETWEEN 281.25 AND 303.75 THEN 'West-NorthWest'
  45.                           WHEN v_bearing BETWEEN 303.75 AND 326.25 THEN 'NorthWest'
  46.                           WHEN v_bearing BETWEEN 326.25 AND 348.75 THEN 'North-NorthWest'
  47.                           WHEN v_bearing BETWEEN 348.75 AND 360.00 THEN 'North'
  48.                           ELSE NULL
  49.                       END
  50.                 ELSE CASE WHEN v_bearing BETWEEN   0.00 AND  11.25 THEN 'N'
  51.                           WHEN v_bearing BETWEEN  11.25 AND  33.75 THEN 'NNE'
  52.                           WHEN v_bearing BETWEEN  33.75 AND  56.25 THEN 'NE'
  53.                           WHEN v_bearing BETWEEN  56.25 AND  78.75 THEN 'ENE'
  54.                           WHEN v_bearing BETWEEN  78.75 AND 101.25 THEN 'E'
  55.                           WHEN v_bearing BETWEEN 101.25 AND 123.75 THEN 'ESE'
  56.                           WHEN v_bearing BETWEEN 123.75 AND 146.25 THEN 'SE'
  57.                           WHEN v_bearing BETWEEN 146.25 AND 168.75 THEN 'SSE'
  58.                           WHEN v_bearing BETWEEN 168.75 AND 191.25 THEN 'S'
  59.                           WHEN v_bearing BETWEEN 191.25 AND 213.75 THEN 'SSW'
  60.                           WHEN v_bearing BETWEEN 213.75 AND 236.25 THEN 'SW'
  61.                           WHEN v_bearing BETWEEN 236.25 AND 258.75 THEN 'WSW'
  62.                           WHEN v_bearing BETWEEN 258.75 AND 281.25 THEN 'W'
  63.                           WHEN v_bearing BETWEEN 281.25 AND 303.75 THEN 'WNW'
  64.                           WHEN v_bearing BETWEEN 303.75 AND 326.25 THEN 'NW'
  65.                           WHEN v_bearing BETWEEN 326.25 AND 348.75 THEN 'NNW'
  66.                           WHEN v_bearing BETWEEN 348.75 AND 360.00 THEN 'N'
  67.                           ELSE NULL
  68.                       END
  69.            END;
  70.   END CompassPoint;

Testing

  1. SET linesize 500 pagesize 5000
  2. SELECT 2*level AS bearing,
  3.        CAST(elms_ws.Frontage.CompassPoint(2*level,0) AS varchar2( 4)) AS compassPoint,
  4.        CAST(elms_ws.Frontage.CompassPoint(2*level,1) AS varchar2(20)) AS compassPointFull
  5.   FROM dual
  6. CONNECT BY level < 181;
  7.    BEARING COMP COMPASSPOINTFULL
  8. ---------- ---- --------------------
  9.          2 N    North
  10.          4 N    North
  11.          6 N    North
  12.          8 N    North
  13.         10 N    North
  14.         12 NNE  North-NorthEast
  15.         14 NNE  North-NorthEast
  16.         16 NNE  North-NorthEast
  17.         18 NNE  North-NorthEast
  18.         20 NNE  North-NorthEast
  19.         22 NNE  North-NorthEast
  20.         24 NNE  North-NorthEast
  21.         26 NNE  North-NorthEast
  22.         28 NNE  North-NorthEast
  23.         30 NNE  North-NorthEast
  24.         32 NNE  North-NorthEast
  25.         34 NE   NorthEast
  26.         36 NE   NorthEast
  27.         38 NE   NorthEast
  28.         40 NE   NorthEast
  29.         42 NE   NorthEast
  30.         44 NE   NorthEast
  31.         46 NE   NorthEast
  32.         48 NE   NorthEast
  33.         50 NE   NorthEast
  34.         52 NE   NorthEast
  35.         54 NE   NorthEast
  36.         56 NE   NorthEast
  37.         58 ENE  East-NorthEast
  38.         60 ENE  East-NorthEast
  39.         62 ENE  East-NorthEast
  40.         64 ENE  East-NorthEast
  41.         66 ENE  East-NorthEast
  42.         68 ENE  East-NorthEast
  43.         70 ENE  East-NorthEast
  44.         72 ENE  East-NorthEast
  45.         74 ENE  East-NorthEast
  46.         76 ENE  East-NorthEast
  47.         78 ENE  East-NorthEast
  48.         80 E    East
  49.         82 E    East
  50.         84 E    East
  51.         86 E    East
  52.         88 E    East
  53.         90 E    East
  54.         92 E    East
  55.         94 E    East
  56.         96 E    East
  57.         98 E    East
  58.        100 E    East
  59.        102 ESE  East-SouthEast
  60.        104 ESE  East-SouthEast
  61.        106 ESE  East-SouthEast
  62.        108 ESE  East-SouthEast
  63.        110 ESE  East-SouthEast
  64.        112 ESE  East-SouthEast
  65.        114 ESE  East-SouthEast
  66.        116 ESE  East-SouthEast
  67.        118 ESE  East-SouthEast
  68.        120 ESE  East-SouthEast
  69.        122 ESE  East-SouthEast
  70.        124 SE   SouthEast
  71.        126 SE   SouthEast
  72.        128 SE   SouthEast
  73.        130 SE   SouthEast
  74.        132 SE   SouthEast
  75.        134 SE   SouthEast
  76.        136 SE   SouthEast
  77.        138 SE   SouthEast
  78.        140 SE   SouthEast
  79.        142 SE   SouthEast
  80.        144 SE   SouthEast
  81.        146 SE   SouthEast
  82.        148 SSE  South-SouthEast
  83.        150 SSE  South-SouthEast
  84.        152 SSE  South-SouthEast
  85.        154 SSE  South-SouthEast
  86.        156 SSE  South-SouthEast
  87.        158 SSE  South-SouthEast
  88.        160 SSE  South-SouthEast
  89.        162 SSE  South-SouthEast
  90.        164 SSE  South-SouthEast
  91.        166 SSE  South-SouthEast
  92.        168 SSE  South-SouthEast
  93.        170 S    South
  94.        172 S    South
  95.        174 S    South
  96.        176 S    South
  97.        178 S    South
  98.        180 S    South
  99.        182 S    South
  100.        184 S    South
  101.        186 S    South
  102.        188 S    South
  103.        190 S    South
  104.        192 SSW  South-SouthWest
  105.        194 SSW  South-SouthWest
  106.        196 SSW  South-SouthWest
  107.        198 SSW  South-SouthWest
  108.        200 SSW  South-SouthWest
  109.        202 SSW  South-SouthWest
  110.        204 SSW  South-SouthWest
  111.        206 SSW  South-SouthWest
  112.        208 SSW  South-SouthWest
  113.        210 SSW  South-SouthWest
  114.        212 SSW  South-SouthWest
  115.        214 SW   SouthWest
  116.        216 SW   SouthWest
  117.        218 SW   SouthWest
  118.        220 SW   SouthWest
  119.        222 SW   SouthWest
  120.        224 SW   SouthWest
  121.        226 SW   SouthWest
  122.        228 SW   SouthWest
  123.        230 SW   SouthWest
  124.        232 SW   SouthWest
  125.        234 SW   SouthWest
  126.        236 SW   SouthWest
  127.        238 WSW  West-SouthWest
  128.        240 WSW  West-SouthWest
  129.        242 WSW  West-SouthWest
  130.        244 WSW  West-SouthWest
  131.        246 WSW  West-SouthWest
  132.        248 WSW  West-SouthWest
  133.        250 WSW  West-SouthWest
  134.        252 WSW  West-SouthWest
  135.        254 WSW  West-SouthWest
  136.        256 WSW  West-SouthWest
  137.        258 WSW  West-SouthWest
  138.        260 W    West
  139.        262 W    West
  140.        264 W    West
  141.        266 W    West
  142.        268 W    West
  143.        270 W    West
  144.        272 W    West
  145.        274 W    West
  146.        276 W    West
  147.        278 W    West
  148.        280 W    West
  149.        282 WNW  West-NorthWest
  150.        284 WNW  West-NorthWest
  151.        286 WNW  West-NorthWest
  152.        288 WNW  West-NorthWest
  153.        290 WNW  West-NorthWest
  154.        292 WNW  West-NorthWest
  155.        294 WNW  West-NorthWest
  156.        296 WNW  West-NorthWest
  157.        298 WNW  West-NorthWest
  158.        300 WNW  West-NorthWest
  159.        302 WNW  West-NorthWest
  160.        304 NW   NorthWest
  161.        306 NW   NorthWest
  162.        308 NW   NorthWest
  163.        310 NW   NorthWest
  164.        312 NW   NorthWest
  165.        314 NW   NorthWest
  166.        316 NW   NorthWest
  167.        318 NW   NorthWest
  168.        320 NW   NorthWest
  169.        322 NW   NorthWest
  170.        324 NW   NorthWest
  171.        326 NW   NorthWest
  172.        328 NNW  North-NorthWest
  173.        330 NNW  North-NorthWest
  174.        332 NNW  North-NorthWest
  175.        334 NNW  North-NorthWest
  176.        336 NNW  North-NorthWest
  177.        338 NNW  North-NorthWest
  178.        340 NNW  North-NorthWest
  179.        342 NNW  North-NorthWest
  180.        344 NNW  North-NorthWest
  181.        346 NNW  North-NorthWest
  182.        348 NNW  North-NorthWest
  183.        350 N    North
  184.        352 N    North
  185.        354 N    North
  186.        356 N    North
  187.        358 N    North
  188.        360 N    North
  189.  180 ROWS selected

I hope this is useful to someone out there.

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