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MapKmlTools

Create Buffer Zones Around Map Features

Generate precise buffer zones around KML points, lines, and polygons. Set any distance and unit. Free browser-based GIS tool with no upload required.

Buffer Settings

Or use the map toolbar to draw points, lines, or polygons.

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What is Buffer Creator?

A Buffer Zone is a defined area enclosing a map feature at a specific distance. It's used in GIS to determine what lies "within X miles" of a location.

This tool performs Geodesic Buffering, meaning it accounts for the earth's curvature to give you mathematically perfect circles, even near the poles.

When Should You Use This Tool?

  • You need to see which customers are within 10 miles of your store.
  • You are creating a 'No Fly Zone' or exclusion area around a site.
  • You need to plan a safety corridor along a pipeline route.

How to Use Buffer Creator

  1. Upload your KML/KMZ containing points or lines.
  2. Select the layer you want to buffer.
  3. Enter the radius distance (e.g. 5) and unit (e.g. km).
  4. Click 'Generate Buffer' to see the result.
  5. Download the new buffer layer.

Frequently Asked Questions

Q:Is the KML Buffer Creator free?

Yes, generating buffer zones is 100% free with no account required.

Q:Does it upload my files to a server?

No, all buffer calculations run in your browser with no upload required.

Q:What units are supported?

Supports meters, kilometers, miles, and feet for buffer distances.

Q:Can I buffer polygons and lines too?

Yes, the tool buffers points, lines, and polygons equally.

Q:How accurate are the buffer zones?

Very accurate. The tool uses geodesic buffering on the WGS84 ellipsoid, meaning it accounts for the Earth's curvature. This gives mathematically precise circles even at large distances, unlike planar buffers that distort near the poles.

Q:Can I buffer hundreds of points at once?

Yes. Upload a KML file with as many points, lines, or polygons as needed. The tool generates an individual buffer for every feature automatically in a single operation.

Q:Can overlapping buffers be merged into one shape?

Yes. Enable the 'Dissolve' option to merge all overlapping and touching buffer zones into a single continuous polygon. This is ideal for creating service area maps or coverage zones.

Q:Is my data uploaded to your servers?

No. Buffer generation runs entirely in your browser using Turf.js. Your KML data is never sent to any server.

Q:What file size limits apply?

KML/KMZ files up to 50MB are supported. Files with thousands of features process quickly since all computation is local.