Package org.locationtech.jts.densify
Class Densifier.DensifyTransformer
- java.lang.Object
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- org.locationtech.jts.geom.util.GeometryTransformer
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- org.locationtech.jts.densify.Densifier.DensifyTransformer
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- Enclosing class:
- Densifier
static class Densifier.DensifyTransformer extends GeometryTransformer
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Field Summary
Fields Modifier and Type Field Description (package private) double
distanceTolerance
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Fields inherited from class org.locationtech.jts.geom.util.GeometryTransformer
factory
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Constructor Summary
Constructors Constructor Description DensifyTransformer(double distanceTolerance)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description private Geometry
createValidArea(Geometry roughAreaGeom)
Creates a valid area geometry from one that possibly has bad topology (i.e.protected CoordinateSequence
transformCoordinates(CoordinateSequence coords, Geometry parent)
Transforms aCoordinateSequence
.protected Geometry
transformMultiPolygon(MultiPolygon geom, Geometry parent)
protected Geometry
transformPolygon(Polygon geom, Geometry parent)
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Methods inherited from class org.locationtech.jts.geom.util.GeometryTransformer
copy, createCoordinateSequence, getInputGeometry, transform, transformGeometryCollection, transformLinearRing, transformLineString, transformMultiLineString, transformMultiPoint, transformPoint
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Method Detail
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transformCoordinates
protected CoordinateSequence transformCoordinates(CoordinateSequence coords, Geometry parent)
Description copied from class:GeometryTransformer
Transforms aCoordinateSequence
. This method should always return a valid coordinate list for the desired result type. (E.g. a coordinate list for a LineString must have 0 or at least 2 points). If this is not possible, return an empty sequence - this will be pruned out.- Overrides:
transformCoordinates
in classGeometryTransformer
- Parameters:
coords
- the coordinates to transformparent
- the parent geometry- Returns:
- the transformed coordinates
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transformPolygon
protected Geometry transformPolygon(Polygon geom, Geometry parent)
- Overrides:
transformPolygon
in classGeometryTransformer
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transformMultiPolygon
protected Geometry transformMultiPolygon(MultiPolygon geom, Geometry parent)
- Overrides:
transformMultiPolygon
in classGeometryTransformer
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createValidArea
private Geometry createValidArea(Geometry roughAreaGeom)
Creates a valid area geometry from one that possibly has bad topology (i.e. self-intersections). Since buffer can handle invalid topology, but always returns valid geometry, constructing a 0-width buffer "corrects" the topology. Note this only works for area geometries, since buffer always returns areas. This also may return empty geometries, if the input has no actual area.- Parameters:
roughAreaGeom
- an area geometry possibly containing self-intersections- Returns:
- a valid area geometry
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