SDO_UTIL.TO_GEOJSON

Format

SDO_UTIL.TO_GEOJSON_JSON(
     geometry  IN SDO_GEOMETRY 
     ) RETURN JSON;

Description

Converts an SDO_GEOMETRY object to a geometry of type JSON in GeoJSON format.

Parameters

geometry: Geometry in SDO_GEOMETRY format to be converted to a JSON object in GeoJSON format.

Usage Notes

For information about using JSON data that is stored in Oracle Database, see Oracle Database JSON Developer's Guide.

To convert a geometry in GeoJSON format to an SDO_GEOMETRY object, use the SDO_UTIL.FROM_GEOJSON function.

Examples

The following example shows conversion to and from JSON format. (The example uses the definitions and data from Simple Example: Inserting_ Indexing_ and Querying Spatial Data, specifically the cola_b geometry from the COLA_MARKETS table.)

DECLARE
  cola_b_geom SDO_GEOMETRY;
  returned_geom SDO_GEOMETRY;
  returned_json JSON;

BEGIN

-- Populate geometry variable with cola market cola_b shape.
SELECT c.shape into cola_b_geom FROM cola_markets c
  WHERE c.name = 'cola_b';

-- From geometry to JSON
returned_json := SDO_UTIL.TO_GEOJSON_JSON(cola_b_geom);

-- From JSON to geometry
returned_geom := SDO_UTIL.FROM_GEOJSON_JSON(returned_json);

END;
/

The following example shows the GeoJSON object that represents a specified geometry. (In this case the geometry definition reflects the cola_b geometry from the COLA_MARKETS table, defined in Simple Example: Inserting_ Indexing_ and Querying Spatial Data.)

SELECT SDO_UTIL.TO_GEOJSON(SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 1003, 1), SDO_ORDINATE_ARRAY(5, 1, 8, 1, 8, 6, 5, 7, 5, 1))) from DUAL;

SDO_UTIL.TO_GEOJSON(SDO_GEOMETRY(2003,NULL,NULL,SDO_ELEM_INFO_ARRAY(1,1003,1),SD
--------------------------------------------------------------------------------
{ "type": "Polygon", "coordinates": [ [ [5, 1], [8, 1], [8, 6], [5, 7], [5, 1] ]