GeoJSON Overlay
LocalOverlay two GeoJSON layers in the browser: intersect/clip, erase, union and spatial join — locally, nothing uploaded.
Layer A (subject)
Layer B (overlay/mask)
What is it? GeoJSON Overlay performs vector overlay between two GeoJSON polygon layers: intersect/clip, erase (A − B), union and spatial join.
TL;DR: Intersect, erase, union or spatial-join two GeoJSON layers.
How to use
- Load layer A and layer B.
- Choose the operation.
- Download the overlay result.
FAQ
Which operation do I need?
Use intersect/clip to keep only overlapping areas, erase to remove B from A, union to combine both.
Is it local?
Yes.
Limitations
- Polygon-polygon overlay is the main use case.
- Complex overlays may be slow in the browser.
Privacy
Privacy first: this tool runs entirely in your browser. Your input and files never leave your device.