srs_is_geographic: Check if WKT definition is a geographic coordinate system
Description
srs_is_geographic() will attempt to import the given WKT string as a
spatial reference system, and returns TRUE if the root is a
GEOGCS node. This is a wrapper for OSRIsGeographic() in the GDAL Spatial
Reference System C API.
Usage
srs_is_geographic(srs)
Value
Logical. TRUE if srs is geographic, otherwise FALSE
Arguments
srs
Character OGC WKT string for a spatial reference system