Format guide
KML
Keyhole Markup Language
KML is Google Earth's XML format for geographic data, points, lines, polygons, with optional descriptions and styles. Originally Keyhole Inc.'s format (Google acquired Keyhole and created Google Earth from it). Standardized as OGC KML in 2008.
How to open a KML file
Google Earth (free), Google My Maps, QGIS, ArcGIS. Plain XML in any editor.
Primary use
Geographic visualization in Google Earth and GIS tools.
Convert other formats to KML
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