lwgeom_area()

double lwgeom_area ( const LWGEOM *  geom )

extern

Definition at line 1863 of file lwgeom.c.

{
        int type = geom->type;
 
        if ( type == POLYGONTYPE )
                return lwpoly_area((LWPOLY*)geom);
        else if ( type == CURVEPOLYTYPE )
                return lwcurvepoly_area((LWCURVEPOLY*)geom);
        else if (type ==  TRIANGLETYPE )
                return lwtriangle_area((LWTRIANGLE*)geom);
        else if ( lwgeom_is_collection(geom) )
        {
                double area = 0.0;
                uint32_t i;
                LWCOLLECTION *col = (LWCOLLECTION*)geom;
                for ( i = 0; i < col->ngeoms; i++ )
                        area += lwgeom_area(col->geoms[i]);
                return area;
        }
        else
                return 0.0;
}

References CURVEPOLYTYPE, LWCOLLECTION::geoms, lwcurvepoly_area(), lwgeom_area(), lwgeom_is_collection(), lwpoly_area(), lwtriangle_area(), LWCOLLECTION::ngeoms, POLYGONTYPE, TRIANGLETYPE, and LWGEOM::type.

Referenced by lwgeom_area(), lwmpoly_to_points(), ST_Area(), test_gdal_polygonize(), test_lwpoly_construct_circle(), test_misc_area(), and test_raster_surface().

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