DatasetSpatialReference Class

The DatasetSpatialReference class represents an OpenGIS Spatial Reference System (SRS). The class uses GDAL API to retrieve data from strings in WKT (Well-known text) format.

DatasetSpatialReference Class

Members

---

DatasetSpatialReference(string wkt_string = 0)

Constructor. Takes a string argument which should be a WKT representation of an SRS.

Arguments

• string wkt_string - Well known text definition to which the object should be initialized.

int importFromWkt(string wkt_string)

Imports the SRS definition from WKT string, wipes the existing one and reassigns it based on the contents of the passed WKT string.

Arguments

• string wkt_string - WKT string.

Return value

0 if import succeeds; otherwise, 1.

int setWellKnownGeogCS(string str)

Sets a GeogCS based on well known name.

Arguments

• string str - Name of well known geographic coordinate system.

  The following well known text values are supported:

  • WGS84 - same as EPSG:4326 but has no dependence on EPSG data files.
  • WGS72 - same as EPSG:4322 but has no dependence on EPSG data files.
  • NAD27 - same as EPSG:4267 but has no dependence on EPSG data files.
  • NAD83 - same as EPSG:4269 but has no dependence on EPSG data files.
  • EPSG:n - n is a GCS or PCS code from the horizontal coordinate system table.

Return value

0 on success; otherwise, 1.

int isValid()

Returns a value indicating if the instance contains valid reference system.

Return value

1 if the instance contains valid SRS; otherwise, 0.