OPG_APIS.GET_GEOMETRY_FROM_V_T

Format

OPG_APIS.GET_GEOMETRY_FROM_V_T_COLS(
     v     IN NVARCHAR2,
     t     IN INTEGER,
     srid  IN NUMBER DEFAULT 8307
) RETURN SDO_GEOMETRY;

Description

Returns an SDO_GEOMETRY object constructed using spatial data, a type value, and optionally an SRID value.

Parameters

v: A String containing spatial data in serialized form,
t: Value indicating the type of value represented by the v parameter. Must be 20. (A null value or any other value besides 20 returns a null SDO_GEOMETRY object.)
srid: SRID (coordinate system identifier) to be used in the resulting SDO_GEOMETRY object. The default value is 8307, the Oracle Spatial SRID for the WGS 84 longitude/latitude coordinate system.

Usage Notes

If there is incorrect syntax or a parsing error, this function returns NULL instead of generating an exception.

Examples

The following examples show point, line, and polygon geometries.

SQL> select opg_apis.get_geometry_from_v_t_cols('10.0 5.0', 20, 8307) from dual;

OPG_APIS.GET_GEOMETRY_FROM_V_T_COLS('10.05.0',20,8307)(SDO_GTYPE, SDO_SRID, SDO_
--------------------------------------------------------------------------------
SDO_GEOMETRY(2001, 8307, SDO_POINT_TYPE(10, 5, NULL), NULL, NULL)


SQL> select opg_apis.get_geometry_from_v_t_cols('LINESTRING(30 10, 10 30, 40 40)', 20, 8307) from dual;

OPG_APIS.GET_GEOMETRY_FROM_V_T_COLS('LINESTRING(3010,1030,4040)',20,8307)(SDO_GT
--------------------------------------------------------------------------------
SDO_GEOMETRY(2002, 8307, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(
30, 10, 10, 30, 40, 40))


SQL>  select opg_apis.get_geometry_from_v_t_cols('POLYGON((-83.6  34.1, -83.6 34.3, -83.4 34.3, -83.4 34.1, -83.6 34.1))', 20, 8307) from dual;

OPG_APIS.GET_GEOMETRY_FROM_V_T_COLS('POLYGON((-83.634.1,-83.634.3,-83.434.3,-83.
--------------------------------------------------------------------------------
SDO_GEOMETRY(2003, 8307, NULL, SDO_ELEM_INFO_ARRAY(1, 1003, 1), SDO_ORDINATE_ARR
AY(-83.6, 34.1, -83.6, 34.3, -83.4, 34.3, -83.4, 34.1, -83.6, 34.1))