/**
* A Point guaranteed to be on this MultiSurface.
*
* @return point on surface
*/
public JTSPointExpression<Point> pointOnSurface() {
if (pointOnSurface == null) {
pointOnSurface = JTSGeometryExpressions.pointOperation(SpatialOps.POINT_ON_SURFACE, mixin);
}
return pointOnSurface;
}
/**
* The mathematical centroid for this MultiSurface. The result is not guaranteed to be on this
* MultiSurface.
*
* @return centroid
*/
public JTSPointExpression<Point> centroid() {
if (centroid == null) {
centroid = JTSGeometryExpressions.pointOperation(SpatialOps.CENTROID, mixin);
}
return centroid;
}