Part of SmartMet Server. See the SmartMet Server documentation for an overview of the ecosystem.
The gis library provides GIS (Geographic Information System) operations for SmartMet Server. It handles coordinate projections, geometry operations, and geographic data access needed by the server's spatial processing capabilities.
- Coordinate projections — coordinate system transformations using PROJ
- Geometry clipping — clipping geographic features to bounding boxes and arbitrary areas
- Geometry simplification — Douglas-Peucker and Visvalingam-Whyatt vertex reduction with topology preservation
- Polygon amalgamation — merging nearby polygons via constrained Delaunay triangulation
- Antimeridian handling — correct handling of geographic interrupts at the antimeridian
- Raster/DEM data — Digital Elevation Model (SRTM) and land cover raster access
- PostGIS integration — reading geographic data from PostGIS databases
Detailed documentation is available in the docs/ directory:
- Overview and quick start
- Coordinate projections
- Geometry clipping
- Geographic interrupts and antimeridian
- Raster and DEM data
- PostGIS integration
- Polygon amalgamation and simplification
Used by smartmet-engine-gis, smartmet-plugin-wms, and other components requiring geographic data processing.
MIT — see LICENSE
Bug reports and pull requests are welcome on GitHub.