geos.osgeo.orgGEOS - Geometry Engine Open Source

Open Navigation Close Navigation Toggle Dark/Light/Auto mode Toggle Dark/Light/Auto mode Toggle Dark/Light/Auto mode Back to homepageBar Open Menu Bar Navigation Project Development Testing CI Status Code of Conduct Project Steering Committee Requests for Comment Usage Download and Build Install Packages API Docs C API Programming C++ API Programming Tools Bindings FAQ Geometry Formats GeoJSON Well-Known Binary (WKB) Well-Known Text (WKT) More News Releases View Source Edit page is a C/C++ library for computational geometry with a focus on algorithms used in geographic information systems (GIS) software. It implements the OGC Simple Features geometry model and provides all the spatial functions in that standard as well as many others. is a core dependency of PostGIS , QGIS , GDAL , Shapely and many others . Capabilities Spatial Model and Functions Geometry Model : Point, LineString, Polygon, MultiPoint, MultiLineString, MultiPolygon, GeometryCollection Predicates : Intersects, Touches, Disjoint, Crosses, Within, Contains, Overlaps, Equals, Covers Operations : Union, Distance, Intersection, Symmetric Difference, Convex Hull, Envelope, Buffer, Simplify, Polygon Assembly, Valid, Area, Length, Prepared geometry (using internal spatial indexes) Spatial Indexes : STR (Sort-Tile-Recursive) packed R-tree spatial index Input/Output : OGC Well Known Text (WKT) and Well Known Binary (WKB) readers and writers. API Features C API (provides long-term API and ABI stability) C++ API (will likely change across versions) Thread safety (using the reentrant C API ) License is open source software available under the terms of GNU Lesser General Public License (LGPL). Governance The project is run by a Project Steering Committee made up of developers and contributors to the project and is a project of OSGeo . We strive to keep our day-to-day interactions collegial and welcoming within a basic Code of Conduct . Relationship to JTS started as a direct port to C++ of the JTS Topology Suite (JTS), and remains tightly bound to that project. Most core algorithms have been developed in JTS and ported to when complete. The projects share testing data. This helps to ascertain when failures are caused by differences in implementation ( fails and JTS does not) and when they are caused by algorithm (both libraries fail). Citation To cite in publications use: contributors (2021). computational geometry library. Open Source Geospatial Foundation. URL https://libgeos.org/ . A BibTeX entry for LaTeX users is @Manual{, title = {{} coordinate transformation software library}, author = {{ contributors}}, organization = {Open Source Geospatial Foundation}, year = {2021}, url = {https://libgeos.org/}, } Built with Hugo...