WasmTS Browser Demo

About

Browser-based demonstration of WasmTS, a WebAssembly port of JTS Topology Suite using GraalVM Native Image.

Key Features

• Geometry types: Point, LineString, Polygon, Multi*, GeometryCollection
• Operations: buffer, union, intersection, difference, convexHull, simplify
• Spatial predicates: contains, intersects, touches, crosses, within, overlaps, covers, equalsTopo
• Geometry transformations: copy, reverse, normalize, getBoundary, getCentroid
• Coordinate support: 2D, 3D (XYZ), and 4D (XYZM)
• STRtree spatial indexing for efficient queries
• PreparedGeometry for optimized repeated predicates
• Advanced operations: LineMerger, CascadedPolygonUnion, OffsetCurveBuilder
• WKT, WKB, and GeoJSON input/output

Implementation

• JTS Topology Suite 1.20.0 compiled to WebAssembly using GraalVM Native Image (26 EA) with web-image backend
• Direct Java-JavaScript bindings via GraalVM @JS annotations
• Automatic memory management via JavaScript GC
• Runs entirely client-side with no server communication

Links: GitHub | JTS Repository | GraalVM web-image