KML is a file format used to display geographic data.
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What is KML?

KML is a file format used to display geographic data in a mapping application, such as Google Maps for mobile. You can create KML files to pinpoint locations, add image overlays, and expose rich data in new ways. KML is an international standard maintained by the Open Geospatial Consortium, Inc. (OGC).

Who uses KML

Casual users

You can use KML to plan trips, share location data with friends, or record hikes you've been on.

Scientists

Scientific data, such as natural resource maps, or geographic trends, are easily shared as a KML file.

Non-Profits

KML files can be used to highlight problems and advocate change.

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Keyhole Markup Language