Package org.meteoinfo.jts.precision

Class GeometryPrecisionReducer


  • public class GeometryPrecisionReducer
extends java.lang.Object
    Reduces the precision of a Geometry according to the supplied PrecisionModel, ensuring that the result is topologically valid.

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      Geometry reduce​(Geometry geom)  
      static Geometry reduce​(Geometry g, PrecisionModel precModel)
      Convenience method for doing precision reduction on a single geometry, with collapses removed and keeping the geometry precision model the same, and preserving polygonal topology.
      static Geometry reducePointwise​(Geometry g, PrecisionModel precModel)
      Convenience method for doing pointwise precision reduction on a single geometry, with collapses removed and keeping the geometry precision model the same, but NOT preserving valid polygonal topology.
      void setChangePrecisionModel​(boolean changePrecisionModel)
      Sets whether the PrecisionModel of the new reduced Geometry will be changed to be the PrecisionModel supplied to specify the precision reduction.
      void setPointwise​(boolean isPointwise)
      Sets whether the precision reduction will be done in pointwise fashion only.
      void setRemoveCollapsedComponents​(boolean removeCollapsed)
      Sets whether the reduction will result in collapsed components being removed completely, or simply being collapsed to an (invalid) Geometry of the same type.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • GeometryPrecisionReducer

        public GeometryPrecisionReducer​(PrecisionModel pm)

    • Method Detail

      • reduce

        public static Geometry reduce​(Geometry g,
                              PrecisionModel precModel)
        Convenience method for doing precision reduction on a single geometry, with collapses removed and keeping the geometry precision model the same, and preserving polygonal topology.
        Parameters:
        g - the geometry to reduce
        precModel - the precision model to use
        Returns:
        the reduced geometry

      • reducePointwise

        public static Geometry reducePointwise​(Geometry g,
                                       PrecisionModel precModel)
        Convenience method for doing pointwise precision reduction on a single geometry, with collapses removed and keeping the geometry precision model the same, but NOT preserving valid polygonal topology.
        Parameters:
        g - the geometry to reduce
        precModel - the precision model to use
        Returns:
        the reduced geometry

      • setRemoveCollapsedComponents

        public void setRemoveCollapsedComponents​(boolean removeCollapsed)
        Sets whether the reduction will result in collapsed components being removed completely, or simply being collapsed to an (invalid) Geometry of the same type. The default is to remove collapsed components.
        Parameters:
        removeCollapsed - if true collapsed components will be removed

      • setChangePrecisionModel

        public void setChangePrecisionModel​(boolean changePrecisionModel)
        Sets whether the PrecisionModel of the new reduced Geometry will be changed to be the PrecisionModel supplied to specify the precision reduction.

        The default is to not change the precision model

        Parameters:
        changePrecisionModel - if true the precision model of the created Geometry will be the the precisionModel supplied in the constructor.

      • setPointwise

        public void setPointwise​(boolean isPointwise)
        Sets whether the precision reduction will be done in pointwise fashion only. Pointwise precision reduction reduces the precision of the individual coordinates only, but does not attempt to recreate valid topology. This is only relevant for geometries containing polygonal components.
        Parameters:
        isPointwise - if reduction should be done pointwise only