KML and GeoJSON
- KML layers are rendered server-side by Google and downloaded as image tiles. KML files must be publicly-accessible via an unauthenticated HTTP request.
- GeoJSON is rendered client-side as a DataLayer. Add features by passing a URL to loadGeoJson() or pass a GeoJSON-formatted string to addGeoJson().
A Note on Fusion Tables
Fusion Tables is deprecated and scheduled to be shut down December 2, 2019. With Fusion Tables deprecated, there aren't any direct integrations with other Google products. Here are some alternatives.