Package org.locationtech.jts.algorithm.locate

Class SimplePointInAreaLocator

  • All Implemented Interfaces:
    PointOnGeometryLocator
    public class SimplePointInAreaLocator
extends java.lang.Object
implements PointOnGeometryLocator
    Computes the location of points relative to a Polygonal Geometry, using a simple O(n) algorithm. This algorithm is suitable for use in cases where only one or a few points will be tested against a given area.

    The algorithm used is only guaranteed to return correct results for points which are not on the boundary of the Geometry.

    Version:
    1.7

    • Constructor Detail

      • SimplePointInAreaLocator

        public SimplePointInAreaLocator​(Geometry geom)

    • Method Detail

      • locate

        public static int locate​(Coordinate p,
                         Geometry geom)
        Determines the Location of a point in an areal Geometry. Computes Location.BOUNDARY if the point lies exactly on a geometry line segment.
        Parameters:
        p - the point to test
        geom - the areal geometry to test
        Returns:
        the Location of the point in the geometry

      • locatePointInPolygon

        public static int locatePointInPolygon​(Coordinate p,
                                       Polygon poly)
        Determines the Location of a point in a Polygon. Computes Location.BOUNDARY if the point lies exactly on the polygon boundary.
        Parameters:
        p - the point to test
        poly - the geometry to test
        Returns:
        the Location of the point in the polygon

      • containsPointInPolygon

        public static boolean containsPointInPolygon​(Coordinate p,
                                             Polygon poly)
        Determines whether a point lies in a Polygon. If the point lies on the polygon boundary it is considered to be inside.
        Parameters:
        p - the point to test
        poly - the geometry to test
        Returns:
        true if the point lies in or on the polygon