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48 lines
2.5 KiB
48 lines
2.5 KiB
2 years ago
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JSTS Topology Suite
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===================
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The JSTS Topology Suite is a JavaScript library of spatial predicates and functions
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for processing geometry conforming to the Simple Features Specification for SQL published by
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the Open Geospatial Consortium. JSTS Topology Suite is also a JavaScript port of the well
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established Java library [JTS Topology Suite](http://tsusiatsoftware.net/jts/main.html) with
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a built in parser for OpenLayers geometries.
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[SWECO Position AB](http://www.swecogroup.com/en/Sweco-group/Services/Geographical-IT/) (my current employer) has gratiously provided sponsoring for this project.
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The primary goal of the project is to provide OpenLayers applications with a complete library for processing
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and analysing simple geometries, but as of version 0.11.0 hard dependencies to OpenLayers was removed
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which makes it possible to use JSTS Topology Suite as a free standing geometry library.
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A [Google group](http://groups.google.com/group/jsts-devs) is available for developer discussions.
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[Unit tests](http://bjornharrtell.github.com/jsts/test/SpecRunner.html) are made
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using the [Jasmine testing framework](https://github.com/pivotal/jasmine). A
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[port](http://bjornharrtell.github.com/jsts/validationsuite/index.html) of
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[JTS Validation Suite](http://www.vividsolutions.com/jts/tests/index.html) provides
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additional tests.
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A "recent" trunk snapshot of [API docs is available](http://bjornharrtell.github.com/jsts/doc/api/index.html). Also
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available are simple example use of [buffer](http://bjornharrtell.github.com/jsts/examples/buffer.html),
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[overlay](http://bjornharrtell.github.com/jsts/examples/overlay.html) and [triangulation](http://bjornharrtell.github.com/jsts/examples/triangulation.html)
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operations. The examples uses a build of [attache-array-js](http://github.com/olooney/attache-array-js) to meet JavaScript ES5 requirements in some browsers.
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There are also some [examples of using JSTS with Node.js](https://github.com/bjornharrtell/jsts/tree/master/examples/nodejs).
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Development environment
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-----------------------
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* Eclipse 4.3.1 (Kepler)
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* Assumes OpenLayers 2.13.1 distribution in project root from http://www.openlayers.org/
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* Assumes OS Ubuntu/Linux
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Design changes
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--------------
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These are effective/potential changes from the original JTS Topology Suite:
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* Skip abstracted CoordinateSequence interface/implementation
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JSTS in use
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-----------
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* [Viper](https://github.com/bjornharrtell/viper) - a game that uses quadtree index and the robust line intersection algorithm.
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