WasmTS Browser Demo

JTS Topology Suite 1.20.0 transpiled to WebAssembly using GraalVM Native Image (26 EA) with web-image backend. Direct Java-JavaScript bindings via @JS annotations. Runs entirely client-side.

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
• Coordinate support: 2D, 3D (XYZ), and 4D (XYZM)
• STRtree spatial indexing, PreparedGeometry
• LineMerger, CascadedPolygonUnion, OffsetCurveBuilder, Densifier, GeometryFixer
• WKT, WKB, and GeoJSON input/output

Visualization uses backproj + maplibre-proj to display geometry in any projected CRS via proj-wasm for in-browser coordinate transformation. Use the Projection picker above to change the CRS and origin point.