JTS TOPOLOGY SUITE
Version History

This document lists the change history of release versions of the JTS Topology Suite.

Further information on JTS can be found at Tsusiat Software's JTS pages.

The current and archived JTS distributions can be obtained at the SourceForge JTS site.

Version 1.14

Release Date: September 23, 2015

Functionality Improvements

Added Envelope.compareTo method
Fixed SegmentSetMutualIntersector classes to be thread-safe
Fixed PreparedGeometry classes to be thread-safe
Added LineDissolver class
Added edgegraph package
Added CoordinateSequences.isEqual method
Extended CoordinateSequences.copy and CoordinateSequences.copy to handle inputs of different dimension
Added CoordinateArrays.envelope() function
Added CoordinateArrays.intersection() function
Added Polygonizer.setCheckValidRings() method for optimizing performance in some situations
Added KMLWriter to convert Geometry to KML representation
Added Coordinate equals3D, equals2D(Coordinate, tolerance), and equalInZ methods.
Added VWSimplifier to perform Visvalingam-Whyatt simplification
Enhanced WKBReader to handle Spatialite WKB format
Added DD.setValue() methods
Added getGeometry() methods to LinearComponentExtracter and LineStringExtracter
Added BufferParameters simplifyFactor setting
Added node counting and ability to not keep intersection points to InteriorIntersectionFinder
Added Polygonizer functionality to extract only polygons forming a valid polygonal geometry
Added KdTree.toCoordinates
Added MinimumBoundingCircle.getFarthestPoints method

Performance Improvements

Performance & memory improvement in PreparedPolygonIntersects by short-circuiting point input case
Allow for memory usage optimization in CascadedPolygonUnion, by avoiding retaining input collection
Fix Point.isEmpty() to avoid allocating a coordinate
Fix Geometry.equalsExact() to short-circuit when the inputs are identical objects
Add short-circuit to PointExtracter to improve performance for Points

Bug Fixes

Fixed RobustLineIntersector heuristic for handling invalid intersection points (computed as outside envelope of input segments due to numeric precision issues)
Fixed CGAlgorithmsDD.intersection to compute intersection correctly
Fixed Geometry.interiorPoint() to compute a true interior point in certain cases
Fixed Geometry.equals to handle null argument
Fixed DistanceToPoint to be thread-safe
Fixed Geometry.interiorPoint() and InteriorPointArea to handle zero-area geometries
Fixed STRtree classes to be thread-safe (by synchronizing the AbstractSTRtree.build() method)
Fixed STRtree.remove() method to avoid a NPE
Fixed DouglasPeuckerSimplifier and TopologyPreservingSimplifier to handle empty geometry components in the input
Fixed ConvexHull to handle input of array of identical coordinates
Fixed GeometryTransformer.transformLinearRing() to handle null inputs
Fixed the extractPoint(distance, offset) methods in LocationIndexedLine and LengthIndexedLine to handle offsets from endpoints correctly.
Fixed GeometryCollectionIterator to correctly handle atomic geometries
Fixed InteriorIntersectionFinder to not short-circuit when finding all nodes
Fixed SubgraphDepthLocator to work with Java 7+ by avoiding sorting with an inconsistent ordering
Fixed FontGlyphReader to use correct Java font value of "SansSerif", and added new constant to match.
Fixed KdTree to correctly implement distance tolerance-based coordinate matching
Fixed LineString.normalize() to correctly handle CoordinateSequences
Fixed CommonBitsRemover to correctly handle CoordinateSequences
Fixed bug in CoordinateArraySequence.clone()

API Changes

Changed interface of SegmentSetMutualIntersector to support thread-safety by removing state
Provided InteriorIntersectionFinderAdder to replace the poorly named IntersectionFinderAdder
Changed some classes in com.vividsolutions.jts.operation.buffer to be package-private

Testing Improvements

Added GeometryTestCase base class to simplify unit tests

JTS I/O

Functionality Improvements

Added GeoJsonReader and GeoJsonWriter classes

API Changes

In OraWriter the connection is now provided to the write() method, not the constructors

Bug Fixes

Fixed OraReader to handle reading GeometryCollection with Point as second element
Many improvements to Oracle API code and performance
Added OraWriter.setOptimizePoint and OraWriter.setOptimizeRectangle methods

JTS TestBuilder

Functionality Improvements

Added ability to read multiple WKBHex geometries from a text file
Added AutoZoom to input
Added Oracle text output
Added more function sets
Removed dependency on Acme GIF encoder library
Improved zooming logic
Added mouse wheel zooming
Improved UI for editing A/B geometries
Added Compute New button to Geometry Functions panel
Added SpatialIndex functions
Added User Data labelling

UI Changes

Moved Options menu items to View menu
Removed Tools menu items (they are available as functions)

Bug Fixes

Fixed to correctly handle changing Swing Look&Feel

Version 1.13

Release Date: December 13, 2012

Functionality Improvements

Changed GeometryFactory.createGeometry() to make a deep copy of the argument Geometry, using the CoordinateSequenceFactory of the factory
Added ability to specify a dimension in CoordinateArraySequence
Changed Geometry.getEnvelopeInternal() to return a copy of the cached envelope, to prevent modification
Added GeometryEditor.CoordinateSequenceOperation to allow easy editing of constituent CoordinateSequences
Added GeometryFactory.createPolygon convenience methods which do not require holes to be specified
Geometry overlay methods now return empty results as atomic types of appropriate dimension
Added RectangleLineIntersector to provide efficient rectangle-line intersection testing
Added getOrdinate and setOrdinate to Coordinate
Quadtree is Serializable
STRtree is Serializable
Added max, average and wrap functions to MathUtil
Improved WKTReader parse error reporting to report input line of error
Improved WKBReader to repair structurally-invalid input
Made TopologyPreservingSimplifier thread-safe
Added AbstractSTRtree.isEmpty() method
Added QuadTree.isEmpty() method
Added KdTree.isEmpty() method
Added decimation and duplicate point removal to ShapeWriter.
ScaledNoder now preserves Z values of input
Added instance methods for all Triangle static methods
Added CGAlgorithmsDD containing high-precision versions of some basic CG algorithms
Added IntersectionMatrix.isTrue() method for testing IM pattern matches
Added getRawCoordinates methods to PackedCoordinateSequence concrete classes
Modified Geometry.isSimple() to explicity check for simplicity for all types, and support GeometryCollections
Improved MCIndexSnapRounder to add nodes only where they are necessary
Added CoordinateArrays.removeNull() method
Enhanced GeometryEditor to handle null geometries returned from operation
Added WKBHExFileReader
Added Distance3D operation

Performance Improvements

Simplified & improved performance of RectangleIntersects by using new RectangleLineIntersector
In RandomPointsInGridBuilder eliminated redundant ArrayList usage
In PreparedPolygonIntersects and PreparedLineStringIntersects added check to avoid creating segment index if all test inputs are points
In AbstractSTRtree switched to using indexed list access for better performance than using iterators
In AbstractSTRtree freed inserted item array after index is built
Improved performance of Polygonizer for cases with many potential holes
Improved performance for some DD methods by making them final
Added fast filter for CGAlgorithmsDD.orientationIndex, and switched to self-operations for DD determinant
Changed STRtree.createNode() to use a static class for nodes
Changed QuadTree Node to use scalar x and y variables rather than a Coordinate to reduce memory allocation
Fixed PreparedGeometry concrete classes to be thread-safe.
Fixed SortedPackedIntervalRTree so that it is thread-safe.

Robustness Improvements

Switched to using DD extended-precision arithmetic to compute orientation predicate
CGAlgorithms.distanceLineLine() improved to be more robust and performant
Fixed robustness issue causing Empty Stack failure in ConvexHull for some nearly collinear inputs
CGAlgorithms.signedArea() uses a more accurate algorithm

Bug Fixes

Fixed Geometry.equalsExact() to avoid NPE when comparing empty and non-empty Points
Fixed CascadedPolygonUnion to discard non-polygonal components created during unioning, to avoid failures and provide more desirable behaviour
Fixed CentralEndpointIntersector to initialize result correctly
Fixed DelaunayTriangulationBuilder.extractUniqueCoordinates(Geometry) to avoid mutating the vertex order of the input Geometry
Fixed ConformingDelaunayTriangulationBuilder to allow non-disjoint site and constraint vertex sets
Fixed RandomPointsInGridBuilder point generation to use circle constraint correctly
Fixed Linear Referencing API to handle MultiLineStrings consistently, by always using the lowest possible index value, and by trimming zero-length components from results
Fixed bug in LocationIndexedLine and LengthIndexLine which was causing an assertion failure when the indexOfAfter() method was called with a constraint location which is at the end of the line
Fixed bug in STRtree.query(Envelope, ItemVisitor) causing an NPE when tree is empty
Fixed issue with creating zero-length edges during buffer topology building under fixed precision, by: adding filter to remove zero-length edges; using a better estimate of scale factor for reducing to fixed precision after initial failure.
Fixed TopologyPreservingSimplifier to return a valid result for closed LineStrings with large distance tolerances
Fixed TopologyPreservingSimplifier to return an empty result for an empty input
Fixed DouglasPeuckerSimplifier to return an empty result for an empty input
Fixed MinimumBoundingCircle to correctly compute circle for obtuse triangles.
Fixd GeometryPrecisionReducer to use input GeometryFactory when polygon topology is fixed
Fixed GeometryNoder bug that was failing to snap to end vertices of lines
Fixed Geometry.getCentroid() and Geometry.getInteriorPoint() to return POINT EMPTY for empty inputs
Fixed DelaunayTriangulationBuilder to correctly extract unique points
Fixed KdTree to correctly handle inserting duplicate points into an empty tree
Fixed LineSegment.projectionFactor() to handle zero-length lines (by returning Double.POSITIVE_INFINITY)
Fixed LocationIndexedLine to handle locations on zero-length lines
Fixed LengthIndexedLine and LocationIndexedLine to handle indexOfAfter() correctly
Fixed WKBReader to handle successive geometrys with different endianness
Fixed GeometricShapeFactory to correctly handle setting the centre point
Fixed GeometryFactory.createMultiPoint(CoordinateSequence) to handle sequences of dimension > 3

API Changes

Changed visibility of TaggedLineStringSimplifier back to public due to user demand

Testing

Added Performance Testing framework (PerformanceTestRunner and PerformanceTestCase)
Added named predicate tests to all Relate test cases

Contributors

Peter Hopfgartner - improved area computation
Michael Michaud - snap-rounding improvements

JTS TestBuilder

Functionality Improvements

Added segment index visualization styling
Improved Geometry Inspector
Added stream digitizing for Polygon and LineString tools
Added output of Test Case XML with WKB
Added Extract Component tool
Added Delete Vertices Or Components tool
Added Geometry Edit Panel pop-up menu, with operations
Added Halton sequence functions
Added sorting functions
Added function for selection of first N components
Added CGAlgorithms functions
Added ability to paste and load multiple WKBHex geometries

Performance Improvements

Using decimation substantially improves rendering time for large geometries.

Bug Fixes

Fixed bug in saving XML test files

Version 1.12

Release Date: June 30, 2011

Functionality Improvements

Added new names for methods for computing Geometry equality:
equals(Object) is a synonym for equalsExact(Geometry)
equalsNorm(Geometry) automatically normalizes the operands
equalsTopo(Geometry) computes topological equality, and is a synonym for the original equals(Geometry)

Added Geometry.norm() to provide non-mutating normalization

Added Geometry.hashCode() to fulfill Java conventions

Added LineIntersector.getEndpoint() method

Added methods to CoordinateSequences to test for and create valid rings

Added minExtent and maxExtent to Envelope

Added ability to compute Single-Sided Buffers (invoked via BufferOp and BufferParameters)

Added GeometryPrecisionReducer

Added ExtendedWKB SRID support to WKBWriter (thanks to Justin Deoliviera)

Improved PolygonShape to support floating-point coordinates

Added GeometryShapeFactory.setRotation(double radians) method

Added GeometricShapeBuilder API to support shape builder development

Added RandomPointsBuilder to allow generating various random point sets

Added RandomPointsInGridBuilder to allow generating various random point sets constrained to a grid

Added KochSnowflakeBuilder

Added SierpinskiCarpetBuilder

Added MathUtil containing mathematics and numerical utility functions

Added Vector2D class providing vector operations

Added DirectedEdgeStar.getNextCWEdge() method to planargraph API

AffineTransformation enhanced to avoid numeric precision issues in case of reflection in X=Y (coordinate flipping)

Added LineSequencer.sequence() static convenience method

Added error indicators to BufferDistanceValidator and BufferResultValidator

Added MinimumClearance class

Added nearestNeighbours methods to STRtree

Performance Improvements

Improved memory performance of ShapeWriter conversions (by tuning coordinate and polygon conversion)
Improved performance of RectangleIntersects by refining SegmentIntersectionTester

Robustness Improvements

Delaunay triangulation uses more robust formulation for the inCircle test
Voronoi computation now uses more robust formulation for the circumcentre computation
Force RectangleIntersects to always use segment-scanning to improve robustness

API Changes

Reduced visibility of internal classes in com.vividsolutions.jts.geom.prep
Reduced visibility of internal classes in com.vividsolutions.jts.simplify
Moved Matrix class into jts.math package
Refactored internal offset curve generation classes in com.vividsolutions.jts.operation.buffer package

Bug Fixes

Fixed CoordinateArraySequence and PackedCoordinateSequence to correctly handle Z ordinate in getCoordinate(int, Coordinate)
Fixed LinearRing to have isClosed() return true for empty rings
Fixed Geometry.union() to use more robust union algorithm. This provides behaviour consistent with union(Geometry).
Fixed Point.isValid() to validate POINT EMPTY correctly
Fixed SnapIfNeededOverlayOp to throw the originating exception,which contains meaningful coordinates
Fixed GeometrySnapper to allow final vertices of LineStrings to snap correctly
Fixed buffer (OffsetCurveSetBuilder) to handle "flat" rings correctly
Fixed IsValidOp to handle reporting "Not Closed" errors on empty rings correctly
Fixed NestedRingTester (used by IsValidOp) to correctly handle the case where a hole touches all the vertices of another hole (which is invalid)
Fixed ConvexHull to handle large geometries with fewer than 3 unique points
Fixed GeometryGraph to ignore empty hole rings when building graph
Fixed LineMerger to skip lines with only a single unique coordinate
Fixed ByteArrayInStream to pad byte buffers with zeroes
Corrected spelling of SquarePointShapeFactory
Fixed tolerance check in KdTree
Updated MasterTester to include more unit tests

JTS TestBuilder

Functionality Improvements

Added [Zoom To Result] button
Improved mark display, with floating point label
Added more random geometry creation functions
Added fractal geometry creation functions
Improved threaded rendering handling to ensure only one frame drawn
Added Magnify Topology capability
Added Geometry Inspector dialog
Better startup script, with auto-home directory detection and JTS_LIB_DIR environment variable (thanks to strk)
Added logging Info window behaviour
Improved saving PNG to allow specifying file name

Bug Fixes

Fixed Stats panel to update when current test changes
Fixed deleting single test case

Version 1.11

Release Date: March 1, 2010

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.toHex to 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)

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

Version 1.10

Release Date: December 31, 2008

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 IsValidOp 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...
Added stream digitizing to Polygon and Line Draw tools

JTS TestRunner

Functionality Improvements

Added -testCaseIndex command-line option

Version 1.9

Release Date: January 2, 2008

Functionality Improvements

Added Polygonal, Lineal, Puntal tag interfaces to better categorize geometry classes
Added Geometry.union() method, UnaryUnionOp class for efficient unioning of geometrys
Added Triangle.area3D method
Added LineSegment.pointAlongOffset method
Added LineSegment.orientationIndex(Coordinate) method
Added PreparedGeometry classes and methods to optimize some geometry functions in batch situations
Added Envelope.covers methods, for preciseness
Added OctagonalEnvelope class
Improved CGAlgorithms.isPointInRing method to handle case where point lies on the ring
Added CGAlgorithms.locatePointInRing method
Added PointInAreaLocator interface, enhanced SimplePointInAreaLocator to extend this
Added RayCrossingCounter, IndexedPointInAreaLocator classes for more efficient Point-In-Polygon testing
Added GeometryCombiner class
Enhanced BufferOp with join styles
Enhanced WKTReader to accept any case for NaN number symbols
Added WKTFileReader class
Improved performance of CoordinateList constructors
Added CascadedPolygonUnion class
Added LinearLocation.isOnSameSegment method
Added LinearLocation.getSegment method
Added LocationIndexedLine.indexOfAfter method
Added interpolation of Z value to linear referencing methods
Added methods to rotate around a given point to AffineTransformation
Allowed GeometricShapeFactory to be subclassed to add new shapes
Added SineStarFactory (primarily to support testing)
Added SortedPackedIntervalRTree class
Added SegmentSetMutualIntersector interface and implementations
Added Node.remove(DirectedEdge) method in planargraph package

Performance Improvements

Improved performance for SimplePointInAreaLocator (by checking ring envelopes as a filter)

Bug Fixes

Geometry.buffer operation fixed to always return polygonal geometries
Fixed bug in Geometry.buffer(distance, quadrantSegs) causing failure for some cases with quadrantSegs = 1
Fixed bug in GeometryFactory.toGeometry(Envelope) which was returning invalid Polygons for "linear" envelopes
Fixed bug in MonotoneChainBuilder which caused failures in situations with segments of zero length
Fixed PointLocator to handle locating in Point geometries
Fixed GeometricShapeFactory to always use provided PrecisionModel
Fixed LinearLocation.clone method
Fixed LinearLocation.isValid method
Fixed Polygonizer to accept single-point linestrings (which are ignored)

API Changes

Deprecated RobustCGAlgorithms
Deprecated BufferOp cap style constants (these are now provided in BufferParameters)
Removed SIRPointInRing

JTS TestRunner

New Features

Added ability to specify GeometryOperation in XML file
Added BufferValidatedGeometryOperation
Added ability to specify custom result matching via resultMatcher parameter in XML files
Added BufferResultMatcher

JTS TestBuilder

UI Improvements

Improved rendering of geometries
Improved symbology for orientation
Simplified Geometry creation
Improved vertex move/add
Added tooltip for coordinate location
Added more geometry functions
Added Copy Result to Test button

Code Improvements

Restructured code for more flexibility, better Swing functionality
Made it easier to add geometry functions

Version 1.8

Release Date: December 19, 2006

Functionality Improvements

Improved robustness for overlay operations, via using geometry snapping
Added Angle class
Added methods to Triangle class
Added LineSegment.midPoint method
Added ability to specify output of Z values to WKTWriter
Added setFormatted, setTab, setMaxCoordinatesPerLine methods to WKTWriter
Added BoundaryNodeRule classes, and ability to specify a Boundary Node Rule in RelateOp, IsSimpleOp, BoundaryOp
Added ability to get the failure location to IsSimpleOp
Added BoundaryOp with improved algorithm for lineal geometries. Changed lineal Geometry classes to use it.
Enhanced Geometry overlay methods to accept empty GeometryCollections.
Enhanced Error Handling for WKTReader
Added CoordinateSequenceFilter
Added AffineTransformation and AffineTransformationBuilder

API Changes

Changed API for IsSimpleOp (required to support returning failure location)

Bug Fixes

Fixed bug in GeometryFactory.buildGeometry causing failure if input contained all GeometryCollections of the same subclass
Changed AssertFailure to TopologyException in PolygonBuilder
Improved correctness of RobustLineIntersector in certain cases where segment endpoints intersect
Eliminated duplicate method execution in TestRunner

JTS TestBuilder

New Features

Zoom tool can now draw zoom box as well as click
Cut, Copy and Paste buttons for Input WKT
added ability to specify custom Geometry Operations

JTS TestRunner

New Features

added ability to specify custom Geometry Operations

Bug Fixes

Eliminated duplicate method execution

Version 1.7.2

Release Date: June 22, 2006

Functionality Improvements

Added support for EWKB (SRIDs only) to WKBReader

Bug Fixes

Fixed bug in CoordinateArrays.ptNotInList. Changed polygonize.EdgeRing to used corrected code.
Fixed bug causing duplicate points in ScaledNoder
Fixed bug causing Null Pointer for empty geometries in OraWriter
Changed AssertFailure to TopologyException in EdgeNode

Version 1.7.1

Release Date: March 20, 2006

Functionality Improvements

Added Hex string conversion to WKBReader and WKBWriter

Bug Fixes

Fixed null point cloning bug in TopologyValidationError (thanks to Markus Gebhard)
Fixed bug in PointLocator fix for LinearRings
Fixed bug in Geometry.isValid and IsValidOp causing some valid polygons to be reported as having a Disconnected Interior (specifically, polygons containing holes touching at a single point, where the point is the highest point in the hole rings, and where the holes have a specific orientation)
Fixed bug in Polygon.isRectangle, which reported some valid rectangles as false

Performance Improvements

Improved performance for Geometry#withinDistance (via short-circuiting)

Contributors

Dave Blasby
Koen van Dijken

Version 1.7

Release Date: December 7, 2005

Functionality Improvements

Added JTSVersion class to provide access to the API version information
Added covers and coveredBy predicates to Geometry
Added Geometry#buffer(distance, quadSegs, endCapStyle) method to expose buffer end cap styles
Added LineString#reverse and MultiLineString#reverse methods
Added centre, intersection, translate, expandBy(distance), expandBy(dx, dy) methods to Envelope
Added CollectionUtil class for performing operations over collections
Added CoordinateArrays comparators
Added CoordinateSequence#getDimension
Added convenience methods toPoint and toLineString to WKTWriter
Added WKB API (WKBReader and WKBWriter classes in com.vividsolutions.jts.io
WKTReader has better handling of numeric parsing, including support for scientific notation
Added IsValidOp#setSelfTouchingRingFormingHoleValid to allow validating SDE-style polygons
Added check for non-closed rings in IsValidOp
Added Linear Referencing API (com.vividsolutions.jts.linearref
Added LineSequencer class to com.vividsolutions.jts.operation.linemerge
Added Subgraph class to com.vividsolutions.jts.planargraph
Added isRemoved method to GraphComponent
Added ConnectedSubgraphFinder class to com.vividsolutions.jts.planargraph.algorithm
Added setVisited, getComponentWithVisitedState, setVisited, getComponentWithVisitedState methods to com.vividsolutions.jts.planargraph.GraphComponent
Added classes to perform Snap Rounding (in com.vividsolutions.jts.noding.snapround>
Improved buffering speed and robustness by using Snap Rounding
Added buffer optimization for results with large numbers of polygons and/or holes
Added STRtree#query(Envelope, ItemVisitor) method
Added Debug#toLine methods
Added ConvexHull(Coordinate[]) constructor

Bug Fixes

Fixed decimal formatting in WKTWriter to force a leading 0 in decimal numbers
Fixed bug in CoordinateArraySequence#setOrdinate
Fixed bug when checking validity of polygon with hole (IsValidOp#checkHolesInShell)
Improved correctness of computated intersections in RobustLineIntersector
Fixed bugs in CoordinateList.clone (thanks to Matthias Bobzien)
Fixed bug in Envelope.equals (thanks to John Cartwright)
Fixed PointLocator for LinearRings

Performance Improvements

Improved performance for overlay operations (point inclusion, identical edge detection)
Improved Convex Hull performance

API Changes

Added SpatiaIndex#query(Envelope, ItemVisitor) method signature
Added CoordinateSequence#getDimension() method signature
Marked GeometryEditor.CoordinateOperation#edit(Geometry, GeometryFactory) method as final, to prevent incorrect use

Semantics Changes

CoordinateArraySequence#setOrdinate now checks that the ordinate index is in range

Version 1.6

Release Date: February 3, 2005

API Changes

Changed to using CoordinateArraySequence instead of DefaultCoordinateSequence (to provide a more descriptive name).

Semantics Changes

PrecisionModel#makePrecise changed to use Symmetric Arithmetic Rounding rather than Banker's Rounding

Functionality Improvements

Added ability to enable Debug methods by setting a system property
Added getNumGeometries and getGeometryN methods to Geometry class, to make API more uniform
Improved API for CoordinateSequence allows more options for improving memory usage and handling custom coordinate storage methods
Added PackedCoordinateSequence to provide reduced memory footprint for geometry objects if desired
Added optimized spatial predicates for rectangles
Added Debug#isDebugging method

Bug Fixes

Fixed bug in Geometry#within() short circuiting
Fixed bug causing Geometry#isValid to throw IllegalArgumentException for certain kinds of holes with invalid rings
Fixed bug causing redundant linestrings to be returned in the result of overlaying polygons containing holes touching their shell.
Polygon#getBoundary now returns a LinearRing if the polygon does not have holes

Architecture Changes

Removed a proliferation of references to the default CoordinateSequenceFactory

Contributors

Andrea Aime

Version 1.5

Release Date: September 22, 2004

This version is upwards compatible with Version 1.4

API Changes

None

Semantics Changes

None

Functionality Improvements

CGAlgorithms#isCCW now handles coordinate lists with repeated points. Also throws an IllegalArgumentException if the input ring does not have 3 distinct points
isValid now checks for invalid coordinates (e.g. ones with Nan or infinite numbers)
added copyDeep() method to CoordinateArrays
added geometry simplification operations DouglasPeuckerSimplifier and TopologyPreservingSimplifier
added methods to Quadtree and STRtree to remove items and query using the Visitor pattern

Performance Improvements

Added short-circuit tests in geometry named predicates based on envelope tests

Bug Fixes

Fixed bugs in Geometry serialization
Fixed bug in ValidOp which reported some MultiPolygons with shells nested inside a hole as invalid
Fixed bug in buffer which caused buffers of some polygons with small & large holes to not contain any holes
Fixed bug in Polygonizer which caused exception if no lines were supplied

Architecture Changes

Basic CG algorithm methods made static in the CGAlgorithms class
Various utility methods made public in CoordinateArrays class

Documentation

More examples provided in com.vividsolutions.jtsexamples package

Version 1.4

Release Date: November 4, 2003

Semantics Changes

none

Functionality Improvements

Added "LINEARRING" tag to WKT syntax
Added GeometryEditor class to allow easy copy/modify of Geometrys
Added GeometricShapeFactory class to easily create standard geometric shapes
Geometries can now carry arbitrary user-defined data objects (via Geometry#get/setUserData(Object) method)
Added CoordinateSequence and CoordinateSequenceFactory interfaces, and default implementations (BasicCoordinateSequence, BasicCoordinateSequenceFactory)
Added Geometry#getFactory
Added new PrecisionModel type of FLOATING_SINGLE, for rounding to single precision floating point
Added DistanceOp#getClosestPoints method, which returns the closest points between two Geometries
Added com.vividsolutions.jts.noding package containing classes to perform fast indexed noding of linestrings
Added com.vividsolutions.jts.operation.polygonize package containing classes to perform polygonization
Added com.vividsolutions.jts.operation.linemerge package containing classes to perform line merging
Added SimpleGeometryPrecisionReducer to allow reducing precision of coordinates of a Geometry
Added LineSegment#closestPoints method to compute the closest points between two line segments
Added MinimumDiameter class to compute minimum diameters of Geometries
Added geom.Triangle class to contain algorithms for Triangles
BufferOp now allows end cap styles to be specified. Three types are supported: round, butt and square.

Performance Improvements

EdgeList now provides a findEqualEdge method which is substantially faster than findEdgeIndex, for large lists
Buffering is now faster and much more robust
Overlap operations are now more robust

Bug Fixes

Envelope#init(Envelope) now handles null Envelopes correctly
CoordinateList#add() now correctly ignores the z-value of Coordinates in determining equality
Geometry#isValid now correctly handles checking validity of LinearRings
Fixed infinite loop bug causing Out Of Memory errors during polygon intersection
Geometry#clone now correctly clones the Geometry's Envelope
LineIntersector#computeEdgeDistance now correctly computes a non-zero edge distance in certain situations when a fixed precision model was being used and the line segment was a single unit in length
Fixed incorrect calculation of depths in DirectedEdgeStar#computeDepths
Fixed BufferSubgraph#addReachable to use explicit stack to avoid stack overflow problems
Fixed various bugs causing some kinds of buffers to be computed incorrectly

API Changes

WKTReader/Writer: changed protected members to private
PrecisionModel type is now an object rather than an int
ConvexHull API changed to remove requirement to pass in CGAlgorithms object

Code Architecture Changes

geom.util package added for utility classes which parse and modify geometries

Documentation

More examples provided in com.vividsolutions.jtsexamples package
Added JTS Developers Guide

Version 1.3

Release Date: April 4, 2003

Semantics Changes

all Geometry methods are now reentrant (thread-safe)
Fixed-precision coordinates are now stored in a rounded but non-scaled form. This makes them compatible with non-precise (Floating) coordinates, and simplifies working with precise coordinates directly. Mixed precision models are now supported in Geometry methods; method results are in the more precise of the input precision models.
Offsets are no longer supported in the Fixed precision model. This is necessary to allow storing fixed precision coordinates in a non-scaled form. This does not reduce the total precision available, since coordinates are stored in a floating-point format.
SRID and Precision Model are no longer checked for equality during Geometry operations. This removes a limitation which provided little semantic benefit.

Functionality Improvements

added Geometry.isWithinDistance(Geometry g, double distance) method, to provide optimized proximity queries
added Geometry.buffer(double distance, int quadrantSegments) method, allowing control over accuracy of buffer approximation
added Geometry.getCentroid() method
added Geometry.getInteriorPoint() method, which uses heuristic methods to return a point in the interior of a Geometry
GeometryFactory.toGeometryArray now returns null if the argument is null

Performance Improvements

Removed unnecessary string construction in EdgeEndStar.propagateSideLabels()
Eliminated unnecessary computation of self-intersections in rings during relate and spatial functions. This provides a large increase in speed when working with large rings and polygons. (Note that IsValid still checks for these self-intersections, which are illegal in LinearRings)
Add short-circuit code to RobustLineIntersector to detect non-intersections more efficiently

Bug Fixes

Fixed ClassCastException occurring in GeometryCollection.getLength()
Fixed bug in Edge Intersection insertion (replaced Coordinate#equals with equals2D to ensure that intersection creation is not sensitive to Z-value).
Fixed handling LineStrings with too few points in GeometryGraph.addLineString
Fixed: was not checking that MultiPolygons don't contain components with too few points.
Fixed Envelope.distance() to return correct distance for all envelopes.
Fixed a few Geometry methods to make them re-entrant.
Fixed CoordinateList.closeRing() to ensure endpoints are not duplicated
Fixed CGAlgorithms.signedArea() to use a simpler algorithm which is more robust and faster.
Fixed bug preventing validating Rings containing an initial repeated point.

API Changes

Added default constructor to WKTReader. It uses the default GeometryFactory
Add two static intersects() methods to Envelope, to allow computing intersections with envelopes defined by points only.
Dropped BinaryPower; its functionality is provided by DoubleBits in a more robust fashion.
Removed a couple of redundant private static methods from Geometry; they have been replaced by methods in CoordinateArrays
The Geometry class is now marked as Serializable

Version 1.2

Release Date: 7 October 2002

Semantics Changes

JTS now allows Geometrys to have repeated points. All operations will continue to perform as before. This removes a significant incompatibility with the OGC spatial data model.
TopologyExceptions may now be thrown by spatial overlay methods. This helps to distinguish between code bugs and known robustness problems. It also provides a machine-readable coordinate for the error location.

Functionality Improvements

RobustLineIntersector now uses "normalized" coordinates to maximize the accuracy of intersection computation.
Upgraded Quadtree with more robust implementation
Replaced IntervalTree with a more robust implementation of BinTree
Added STRTree 2-D spatial index, which exhibits better performance than QuadTrees in many situations.
Added EnhancePrecisionOp, which uses precisioning enhancing techniques to reduce the number of failure cases due to robustness problems.

Bug Fixes

fixed ConvexHull to use TreeSet instead of HashSet for coordinates
Fixed isValid for GeometryCollections containing Polygons, which were sometimes erroneously returning a validity failure for correct Geometrys.
Fixed bug in LineSegment.distancePointLine() which would return the incorrect distance for a LineSegment with two identical points
Improved error handling in CGAlgorithms.isCCW()
IsValid now checks for too few points in a geometry component (e.g. due to repeated points in a ring)

API Changes

added Stopwatch class
added Geometry.getArea() and Geometry.getLength() methods
added CGAlgorithms.signedArea() method
added methods to LineSegment - closestPoint(), getLength()
added CoordinateArrrays and CoordinateLists utility classes
Added TopologyValidationError.getErrorType() method
Added Envelope#intersects; deprecated Envelope#overlaps.
Added Geometry#geometryChanged() method to allow signaling when Geometry coordinates have been mutated by a client class
Added STRTree class implementing a Sort-Tile-Recursive spatial index (a variant of a packed R-tree)
Deleted IntervalTree 1-D spatial index (replaced by BinTree)
Add BinTree 1-D spatial index

Version 1.1.1

Release Date: 9 April 2002

Bug Fixes

fixed decimal-point symbol localization bug in WKTWriter
fixed bug in Envelope.int(Envelope env)
fixed filename case of SFSMultiLineString.java and IntervalTree.java

API Changes

deleted TopologyException class
renamed CGAlgorithms.isPointInPolygon to isPointInRing (a more accurate description of what the method computes)

API Additions

added Geometry.getCoordinate() method
added Geometry.distance() method
added GeometryComponentFilter interface and Geometry.apply(GeometryComponentFilter) method

Version 1.1

Release Date: 28 March 2002

New Features

added Geometry.isSimple() and Geometry.isValid() methods
improved design of topological data structures
added Geometry.setSRID() method
improved functionality of the Envelope class
added ability to write to an arbitrary java.io.Writer object to WKTWriter
added Validate and Mark Location functionality to TestBuilder

Version 1.0

Release Date: 1 February 2002

Removed some non-compatibilities with Java 1.1
Fixed bug in constructing buffer outline around inside of angles
In TestBuilder vertices are now displayed with fixed size in view units
Improved code for WKTWriter.writeFormatted()
Fixed bug in constructor for LinearRing
Improved implementation of sweepline intersection algorithm to avoid use of dynamic set.
Fixed bug in ConvexHull.cleanRing()
Refactored RobustLineIntersector and NonRobustLineIntersector

Version 0.0

Release Date: 30 May 2001

Baseline version

JTS TOPOLOGY SUITE Version History

Version 1.14

Functionality Improvements

Performance Improvements

Bug Fixes

API Changes

Testing Improvements

JTS I/O

Functionality Improvements

API Changes

Bug Fixes

JTS TestBuilder

Functionality Improvements

UI Changes

Bug Fixes

Version 1.13

Functionality Improvements

Performance Improvements

Robustness Improvements

Bug Fixes

API Changes

Testing

Contributors

JTS TestBuilder

Functionality Improvements

Performance Improvements

Bug Fixes

Version 1.12

Functionality Improvements

Performance Improvements

Robustness Improvements

API Changes

Bug Fixes

JTS TestBuilder

Functionality Improvements

Bug Fixes

Version 1.11

Functionality Improvements

Performance Improvements

API Changes

Bug Fixes

JTS TestBuilder

Functionality Improvements

Version 1.10

Functionality Improvements

Performance Improvements

Bug Fixes

API Changes

JTS TestBuilder

UI Improvements

JTS TestRunner

Functionality Improvements

Version 1.9

Functionality Improvements

Performance Improvements

Bug Fixes

API Changes

JTS TestRunner

New Features

JTS TestBuilder

UI Improvements

Code Improvements

Version 1.8

Functionality Improvements

API Changes

Bug Fixes

JTS TestBuilder

New Features

JTS TestRunner

New Features

Bug Fixes

Version 1.7.2

Functionality Improvements

Bug Fixes

Version 1.7.1

Functionality Improvements

Bug Fixes

Performance Improvements

Contributors

Version 1.7

JTS TOPOLOGY SUITE
Version History