GIS & Spatial Utilities
Geometry Simplifier & Optimizer
Reduce vertex count and file size of heavy spatial datasets (GeoJSON, KML, KMZ, GPX) using Douglas-Peucker optimization with interactive Leaflet map preview and reduction metrics.
Geometry Simplifier & Optimizer
Reduce vertex count and file size of heavy spatial datasets (GeoJSON, KML, KMZ, GPX) using Douglas-Peucker optimization with interactive Leaflet map preview and reduction metrics.
Upload Heavy Spatial File
Click or drop GeoJSON / KML / KMZ / GPX
No file loaded
Tolerance Configuration
0.0010°Applies radial distance simplification before Douglas-Peucker for maximum point reduction while preserving shape.
About this calculator
This free geometry simplifier calculator runs entirely in your browser: what you enter is never uploaded. Use the calculation steps and the theory section to check the working, and print a calculation sheet with the inputs, results and formulae for your records.
Methods and references: Douglas-Peucker 1973, Turf.js, GeoJSON RFC 7946.
Topics: simplify, douglas-peucker, turf, leaflet, vertex reduction, geojson, kml, kmz, gpx, map optimizer.
Engineering notice: Results are for preliminary estimation, screening and education. All inputs and outputs must be independently verified by a qualified professional engineer before use in any design or construction decision. Read the full disclaimer
Disclaimer
This calculation sheet was generated with Geotechnical Toolbox for preliminary estimation, screening, educational and verification purposes only. Geotechnical engineering involves site-specific ground conditions and uncertainty. All inputs, methods, results and figures must be independently checked and approved by a qualified Professional Engineer (P.Eng. / PE) before being relied on for design, construction or any safety-critical decision. Results reflect the values entered at the time of printing. The author and site accept no liability for errors, omissions or damages arising from their use.
Open this calculator online: geotechnica.ca/tools/geometry-simplifier
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