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Version 3.14.0

3 minutes to read

The 3.14 release of GEOS is now available to download.

The headline features of this release are:

  • Coverage cleaning for polygonal coverages.
    • Remove small gaps and overlaps.
    • Control the tolerance of gap removal.
    • Choose between different gap removal heuristics.
      • Longest-border, max area, min area
  • Clustering algorithms in the C API.
    • Exposing previously C++ only implementations into the C API for wider usage.
    • DBSCAN, Intersects, Envelope Intersects, and others
  • Grid cell overlay with polygon.
    • Beyond the flood-fill, get actual proportions of each cell covered.

This release includes the following new features in the C API (and of course underlying changes to the C++ code to support these features):

  • GEOSCoordSeq_hasZ(coordseq) returns boolean
  • GEOSCoordSeq_hasM(coordseq) returns boolean
  • GEOSCoordSeq_setM(coordseq, index, value) sets the M ordinate on a point in a sequence
  • GEOSCoordSeq_getM(coordseq, index) reads the M ordinate on a point in a sequence
  • GEOSCoverageClean() and GEOSCoverageCleanWithParams(), with GEOSCoverageCleanParams for control over polygonal coverage cleaning
  • GEOSGridIntersectionFractions() for grid cell overlay
  • GEOSisSimpleDetail() to show where a linestring is not simple (self crossing points usually)
  • GEOSClusterDBSCAN(), GEOSClusterGeometryDistance(), GEOSClusterGeometryIntersects(), GEOSClusterEnvelopeDistance(), GEOSClusterEnvelopeIntersects() as CAPI clustering functions
  • GEOSGeoJSONWriter_setOutputDimension() for greater control of JSON output of 3 and 4 dimensional geometry.

The full list of changes is as follows:

  • New things:

    • Add clustering functions to C API (GH-1154, Dan Baston)
    • Ported LineDissolver (Paul Ramsey)
    • Ported CoverageCleaner (Paul Ramsey)
    • Add GEOSGridIntersectionFractions to C API (GH-1295, Dan Baston)
    • Add functions to interrupt processing in a specific thread/context (GH-803, Dan Baston)
    • Add “geos-targets.cmake” to build tree to allow building other software against GEOS build without installing first (GH-1269, Dan Baston)
    • Add GEOSCoordSeq_hasZ, GEOSCoordSeq_hasM (GH-1256, Aurele Ferotin)
    • Add GEOSCoordSeq_createWithDimensions, GEOSCoordSeq_setM, GEOSCoordSeq_getM (GH-1246, Dan Baston)
    • Add GEOSGeoJSONWriter_setOutputDimension (GH-1260, Aurele Ferotin)
    • Add GEOSGeom_transformXYZ (GH-1157, Aurele Ferotin)
    • Add GEOSisSimpleDetail (GH-1296, Dan Baston)

  • Breaking Changes:

    • C++17 is now required (GH-1144)
    • Stricter WKT parsing (GH-1241, @freemine)
    • GEOSCoordSeq_setOrdinate returns an error if the sequence does not have the specified ordinate (GH-1245, Dan Baston)

  • Fixes/Improvements:

    • Fix ConcaveHullOfPolygons nested shell handling (GH-1169, Martin Davis)
    • Fix RelateNG for computing IM for empty-nonempty cases (Martin Davis)
    • Fix TopologyPreservingSimplifier/TaggedLineString to avoid jumping components (JTS-1096, Martin Davis)
    • Fix WKTWriter for small precisions and with trim enabled (GH-1199, Mike Taves)
    • Fix BufferOp to increase length of segments removed by heuristic (GH-1200, Martin Davis)
    • Improve RelateNG performance for A/L cases in prepared predicates (GH-1201, Martin Davis)
    • Improve OffsetCurve to handle mitre joins for polygons (Martin Davis)
    • Fix inscribed circle initialization (GH-1225, Benoit Maurin)
    • Fix overlay heuristic for GeometryCollections with empty elements (GH-1229, Martin Davis)
    • Add ring buffer hole removal heuristic (GH-1233, Martin Davis)
    • Fix buffer element erosion for negative distance and remove overlay deps (GH-1239, Martin Davis)
    • Fix OverlayNG coordinate dimension handling for EMPTY geometries (GH-1258, Martin Davis)
    • Fix DepthSegment comparison logic (really this time) (GH-1266, Martin Davis)
    • Change CoverageGapFinder to return polygons (Martin Davis)
    • Update DiscreteFrechetDistance to new algorithm (GH-1274, Paul Ramsey)