Buffer Analysis
Upload/paste GeoJSON or add points by clicking the map; create buffers in meters or kilometers, see the influence zone on the map, compute its area and download the result as GeoJSON.
Or skip the input entirely and click the map below to add points — each click creates one point.
If there are multiple features, the same distance is applied to all of them; the output is a FeatureCollection.
Your data stays in your browser — nothing is uploaded to a server. All buffer computation runs client-side (Turf.js).
Click the map to add points.
Related Tools
Online Buffer Analysis and Influence Zone Creator
Draw Influence Zones in Seconds
Buffer analysis is one of the most fundamental GIS operations: it generates the zone within a given distance around a geometry. This tool lets you create buffers in the browser without opening a desktop GIS package — point, line and polygon geometries are all supported.
- Two Input Paths: Upload/paste GeoJSON or add points by clicking the map
- Meters / Kilometers: Enter the distance in m or km; decimal comma is supported
- Area Readout: The buffer area is computed in m², hectares and decares
- Batch Operation: One distance for multiple features; FeatureCollection output
How to Use
Upload/paste your GeoJSON data (WGS84) or click the map to add points. Enter the buffer distance, pick the unit and click "Create Buffer". The result is shown on the map with a semi-transparent fill, with your input drawn on top in a darker stroke. Download the buffer GeoJSON, copy it to the clipboard and read the total area in m²/ha/decares.
Other Tools
Use the Area Calculator to cross-check the buffer polygon area on a map, and the GeoJSON Validator to verify the output.
Frequently Asked Questions
What is buffer analysis?
Buffer analysis is a fundamental GIS operation that draws the zone within a given distance around a point, line or polygon geometry. The 500 m surroundings of a school, the 100 m protection strip along a stream or the 25 m safety corridor of a pipeline are all buffers. This tool applies the same distance to every geometry you provide and returns the result as a FeatureCollection.
How is the distance calculated?
Buffers are generated with the buffer function of the Turf.js library. While working on WGS84 degree coordinates, Turf computes the distance with a geodesic approach (based on a spherical model of the Earth), so a distance entered in meters stays geographically meaningful and is not distorted by latitude-dependent degree scaling. The result is sufficient for planning and analysis work; use a projected GIS package where survey-grade precision is required.
Where is it used in municipal work?
Buffer analysis is very common in municipal work: defining the influence zone of a facility (market place, community center, health clinic reach), drawing stream/coastal protection strips, delineating impact belts around noise sources, drafting access (service) areas for fire and ambulance stations, building setback distances in zoning plans and the absolute/short/medium-distance protection zones of drinking water sources.