OGRPoint point(10, 20); OGRwkbGeometryType type = point.getGeometryType();
OGRLineString line; line.addPoint(10, 20); line.addPoint(30, 40); OGRwkbGeometryType type = line.getGeometryType();
OGRPolygon polygon; OGRLinearRing ring; ring.addPoint(10, 10); ring.addPoint(20, 10); ring.addPoint(20, 20); ring.addPoint(10, 20); polygon.addRing(&ring); OGRwkbGeometryType type = polygon.getGeometryType();The `OGRPolygon` class represents a polygon geometry object with a single ring. The ring consists of four points forming a square with vertices at (10, 10), (20, 10), (20, 20), and (10, 20). The `getGeometryType()` function retrieves the geometry type of the object, which in this case is `wkbPolygon`. In all three examples, we use the `getGeometryType()` function of the OGRGeometry class to retrieve the geometry type of the object. We then store the type in an `OGRwkbGeometryType` variable. The `OGRwkbGeometryType` is an enumeration that represents the different geometry types supported by GDAL. The package library for OGRGeometry and related classes is GDAL/OGR (Geospatial Data Abstraction Library and Vector Formats).