JTS Version 1.11 released!

JTS Version 1.11 is now available for download from SourceForge.


The version contains numerous enhancements, including

• Delaunay triangulation and Voronoi diagrams
• AWT Shape reading and writing
• Geometry similarity metrics
• support for Geometry densification
• Numerous improvements to the JTS TestBuilder

Full release notes:

Functionality Improvements

• Added CoordinateArrays.isRing
• Added CGAlgorithms.signedArea(CoordinateSequence)
• Added CoordinateArrays.copyDeep(...) method to copy sections of arrays
• Added CoordinateList.add(Coordinate[], boolean, int, int) method to add sections of arrays
• Added LineSegment.toGeometry(), LineSegment.lineIntersection()()
• Added LineSegment.hashCode()
• Added geometric similarity classes (HausdorffSimilarityMeasure, AreaSimilarityMeasure)
• Added MinimumDiameter.getMinimumRectangle()
• Added MinimumBoundingCircle class
• Added Densifier class
• Added triangulation API, including QuadEdgeSubdivision, IncrementalDelaunayTriangulator, ConformingDelaunayTriangulator and supporting classes
• Added VoronoiDiagramBuilder to perform Voronoi diagram generation
• Added scaleInstance(scaleX, scaleY, x, y) to AffineTransformation
• Added AffineTransformationFactory to allow generating transformations from various kinds of control inputs
• Added BinTree.remove() method
• Fixed BinTree.query() to allow null interval arguments
• Added ShapeReader API to convert Java2D Shapes into JTS Geometry
• Added ShapeWriter API to convert JTS geometry into Java2D Shapes
• Added FontGlyphReader API to render Java2D text font glyphs into geometry
• Added SdeReader to jtsio library
• Added Debug break methods
• Added Memory utility for reporting memory statistics
• Added ObjectCounter utility for counting objects
• Added createSquircle and createSuperCircle to GeometricShapeFactory

Performance Improvements

• Improved performance of Geometry.getArea() and Geometry.getLength() when used with custom CoordinateSequences

API Changes

• Deprecated WKBWriter.bytesToHex in favour of WKBWriter.toHexto regularize and simplify method name

Bug Fixes

• Fixed Point.isValid() to check for invalid coordinates (ie with Nan ordinates)
• Fixed Geometry.distance() and DistanceOp to return 0.0 for empty inputs
• Fixed Buffer to handle degenerate polygons with too few distinct points correctly
• Added illegal state check in LineSegment.pointAlongOffset()
• Fixed exception strategy in BufferSubgraph to handle certain robustness failures correctly
• Fixed robustness problem in OffsetCurveBuilder in computing mitred joins for nearly parallel segments
• Fixed minor bug in BufferInputLineSimplifier which prevented simplification of some situations
• Fixed bug in BufferInputLineSimplifier which caused over-simplification for large tolerances
• Fixed bug in Angle.normalizePositive to handle values > 2PI correctly
• Fixed WKTWriter to emit correct syntax for MULTIPOINTs
• Fixed WKTReader to accept correct syntax for MULTIPOINTs
• CGAlgorithms.isCCW now checks for too few points in the ring and throws an IllegalArgumentException
• Fixed bug in AffineTransformation#eqals (logic bug)
• Fixed bug in CoordinateList#closeRing (cloning closing Coordinate)

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JTS TestBuilder

Functionality Improvements

• WKT input is cleaned automatically when loaded (illegal chars are removed)
• Added WKT-Formatted option to Test Case View dialog
• Many new geometry functions added
• Geometry functions are displayed in tree
• Geometry functions can be implemented as Java static class methods.
• Geometry function classes can be loaded dynamically from command-line
• Improved handling of very large geometry inputs and results
• Threaded rendering allows display of very large geometries without limiting usability
• Added Draw Rectangle tool
• Added Drag-n-drop loading of .SHP files
• Added Info tool to provide persistent display of geometry point/segment information
• Added display of memory usage