Deprecated. Returns the current datum setting.
Syntax
intlu GsGetDatum ( GsId gs );
Arguments
gs ID returned by GsInit_r for the current instance of GeoStan. Input.
Return Values
Current datum setting. Valid settings are DATUM_NAD27 and DATUM_NAD83 (default).
Prerequisites
GsSetDatum
Notes
This function returns the datum currently used by GeoStan in calculating address coordinates. This setting affects only the numeric coordinates returned by GsDataGet for the latitude and longitude of an address.
A datum is a mathematical model of the Earth used to calculate the coordinates on any map, chart, or survey system. The North American Datum (NAD) is the official reference ellipsoid used for the primary geodetic network in North America.
Although the return values are DATUM_NAD27 and DATUM_NAD83, note that TomTom uses WGS84 instead of NAD83. These two coordinate systems are compatible.