Buffer
Create a spatial buffer around a geometry.
How to use
- Paste a geometry as a coordinate, WKT, or GeoJSON — or load one from another tool via the workspace banner.
- Enter a buffer distance and pick a unit (meters/kilometers/miles).
- Switch to the Batch (GeoJSON) tab to buffer every feature in an uploaded FeatureCollection at once, using the same distance/unit.
- The distance is applied by projecting to a local planar CRS first, not a naive degree radius — accurate at any latitude.
This isn't a naive degree-radius buffer — the distance you enter (meters/km/miles) is applied by projecting to a local planar CRS, buffering there, then reprojecting back to WGS84. That keeps the buffer width accurate at any latitude, but very large buffers (e.g. near the poles or spanning thousands of km) can still accumulate some distortion from that projection step.
Input
Map Preview
Buffer Calculation Coverage
Draws a buffer of a given distance around a Point, LineString, or Polygon. The distance is applied by projecting to a local planar CRS, buffering there, then reprojecting back to WGS84 — not a naive degree-radius calculation — so it stays accurate at any latitude.
The Batch (GeoJSON) tab buffers every feature in an uploaded FeatureCollection at once, using the same distance and unit.
Frequently asked questions
Is it accurate near the poles?
Buffering after projecting to a local planar CRS keeps it accurate at high latitude, though very large buffers spanning thousands of km can still accumulate some distortion from that projection step.
Can I buffer a line?
Yes — Point, LineString, and Polygon geometries can all be buffered.