AV-G23
Simplify Geometry
Reduce vertices in lines and polygons with Douglas–Peucker and compare on a map.
● Runs on your device; nothing is uploadedHow to use it
- Paste GeoJSON, WKT, KML or GPX, open a file, or click Example.
- Drag the Tolerance slider; the approximate ground size is shown.
- Tick High quality for a slower, more exact result.
- Compare the result (green) with the dashed original on the map.
- Check the vertex reduction, then click Download GeoJSON.
Limits
- File size
- 50 MB
- Features
- 200,000
- Tolerance
- Off to 0.1°, on a log scale
- Map preview
- First 5,000 features
Features
- Douglas–Peucker simplification via Turf
- Polygon rings never drop below four positions
- Vertex counts before and after, with percentage reduction
- Accepts GeoJSON, WKT, KML, GPX, CSV, TopoJSON and zipped Shapefiles
For AI agents: avtools_geometry_simplify
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