#include <ogr_geometry.h>
Inheritance diagram for OGRSurface:
Public Member Functions | |
virtual double | get_Area () const=0 |
virtual OGRErr | Centroid (OGRPoint *poPoint) const=0 |
virtual OGRErr | PointOnSurface (OGRPoint *poPoint) const=0 |
double OGRSurface::get_Area | ( | ) | const [pure virtual] |
Get the area of the surface object.
For polygons the area is computed as the area of the outer ring less the area of all internal rings.
This method relates to the SFCOM ISurface::get_Area() method.
Implemented in OGRPolygon.
OGRErr OGRSurface::Centroid | ( | OGRPoint * | poPoint | ) | const [pure virtual] |
Compute and return centroid of surface. The centroid is not necessarily within the geometry.
This method relates to the SFCOM ISurface::get_Centroid() method.
NOTE: Only implemented when GEOS included in build.
poPoint | point to be set with the centroid location. |
Implemented in OGRPolygon.
OGRErr OGRSurface::PointOnSurface | ( | OGRPoint * | poPoint | ) | const [pure virtual] |
This method relates to the SFCOM ISurface::get_PointOnSurface() method.
NOTE: Only implemented when GEOS included in build.
poPoint | point to be set with an internal point. |
Implemented in OGRPolygon.