JTS Topology Suite An API for modelling and manipulating 2-dimensional linear geometry
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JTS Topology Suite Description

An API for modelling and manipulating 2-dimensional linear geometry The JTS Topology Suite is an API for modelling and manipulating 2-dimensional linear geometry.JTS provides numerous geometric predicates and functions. JTS conforms to the Simple Features Specification for SQL published by the Open GIS Consortium. Requirements: · Java What's New in This Release: · Functionality Improvements · Added Geometry.reverse() method for all geometry types · Added setSrsName, setNamespace, setCustomRootElements methods to GMLWriter · Added Envelope.getArea method · Added copy, copyCoord methods to CoordinateSequences · Added area method to Envelope · Added extractPoint(pt, offset) methods to LengthIndexedLine and LocationIndexedLine · Added CoordinatePrecisionReducerFilter · Added UnaryUnionOp(Collection, GeometryFactory) constructor to handle empty inputs more automatically · Added DiscreteHausdorffDistance class · Made LineMerger able to be called incrementally · Added GeometricShapeFactory.createArcPolygon to create a polygonal arc · Enhanced Geometry.buffer() to preserve SRID · Performance Improvements · Improved performance for EdgeList (by using a more efficient technique for detecting duplicate edges) · Improved performance for ByteArrayInStream (by avoiding use of java.io.ByteArrayInputStream) · Unrolled intersection computation in HCoordinate to avoid object allocation · Improved performance for buffering via better offset curve generation and simplification. · Improved performance for IsValipOp by switching to use STRtree for nested hole checking · Bug Fixes · Fixed Geometry.getClassSortIndex() to lazily initialize the sorted class list. This fixes a threading bug. · Fixed RectangleContains to return correct result for points on the boundary of the rectangle · Fixed error in com.vividsolutions.jts.simplify.LineSegmentIndex which caused polygons simplified using TopologyPreservingSimplifier to be invalid in certain situations · Fixed error in DouglasPeuckerSimplifier which caused empty polygons to be returned when they contained a very small hole · Fixed PackedCoordinateSequence to return NaN for null ordinate values · Fixed Geometry.centroid() (CentroidArea) so that it handles degenerate (zero-area) polygons · Fixed Geometry.buffer() (OffsetCurveBuilder) so that it handles JOIN_MITRE cases with nearly collinear lines correctly · Fixed GeometryFactory.toGeometry(Envelope) to return a CW polygon · Fixed UnaryUnionOp to correctly handle heterogeneous inputs with P/L/A components · Fixed UnaryUnionOp to accept LINEARRINGs · Fixed CentroidArea to handle zero-area polygons correctly · Fixed WKBWriter to always output 3D when requested, and to handle 2D packedCoordinateSequences correctly in this case · Fixed NodedSegmentString to handle zero-length line segments correctly (via safeOctant) · Cleaned up code to remove unneeded CGAlgorithms objects · Fixed GeometricShapeFactory.createArc to ensure arc has requested number of vertices · API Changes · Moved GML I/O classes into core JTS codebase · Changed GMLWriter to not write the srsName attribute by default · In DistanceOp switched to using nearestPoints method names · Exposed STRtree.getRoot() method · JTS TestBuilder · UI Improvements · Added ability to read GML from input panel · Added GML output to View dialog · Added file drag'n'drop to Geometry Input text areas · Add display of computation time · Added Stats panel · Added Scalar functions panel, with extensible function list · Added Save as PNG · JTS TestRunner · Functionality Improvements · Added -testCaseIndex command-line option

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