@property
    def geographic(self):
        if gdal.HAS_GDAL:
            return self.srs.geographic
        else:
            return self.wkt.startswith('GEOGCS')
Is this Spatial Reference geographic?
dataset/ETHPy150Open django/django/django/contrib/gis/db/backends/base/models.py/SpatialRefSysMixin.geographic