geo_is_empty geo_typename geog_area geog_centroid geog_length geog_perimeter geom_azimuth geom_length geom_perimeter line_numpoints line_point_n

geog_centroid() GSERIALIZED * geog_centroid ( const GSERIALIZED *  g, bool  use_spheroid  ) Return the centroid of a geometry. Note PostGIS function: geography_centroid(PG_FUNCTION_ARGS).