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How to Convert GEOJSON to KML
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When Do You Need to Convert GEOJSON to KML?
KML is what Google Earth and Google Maps read, and GeoJSON is what web mapping and GIS tools produce. Converting GeoJSON to KML is the usual step before showing data in Google Earth or sharing it with someone who works there.
What Happens When You Convert GEOJSON to KML
GDAL reads the GeoJSON and writes KML. Geometry converts directly, since both formats describe points, lines and polygons. Coordinates are assumed to be in WGS84 longitude and latitude, which GeoJSON specifies and KML requires, so no reprojection is normally needed. The difference between the two shows up in attributes: GeoJSON carries arbitrary properties per feature, while KML expects a name and description and puts everything else into extended data, so property presentation changes.
Worth knowing before you convert
KML is built for display rather than analysis. If the data is heading into a GIS rather than a viewer, a format such as GeoPackage or Shapefile preserves more.
About GEOJSON and KML
application/geo+json
Geographic data structure.
application/vnd.google-earth.kml+xml
KML is a markup language used to represent geographic data for visualization in tools like Google Earth. It supports placemarks, paths, polygons, and overlays, enabling rich geospatial presentations.
Conversion Notes
GIS format conversion preserves geometry and attribute data, but coordinate reference systems may differ between GEOJSON and KML. Our converter re-projects coordinates where needed. Complex curved geometries may be approximated as straight-line segments in formats that don't natively support them. Attribute field names may be truncated in legacy formats with character limits.
Frequently Asked Questions
Yes, though they are reorganised. KML has specific name and description fields and holds the rest as extended data, so they display differently in Google Earth.