Map Extractor

Map Extractor is a Unity3D Editor asset that extracts 2D maps from Google MapBing Mapand Open Street Map.

It finds the best metric resolution available at a specific geographic coordinate and extracts 2D maps up to 8192×8192 pixels

Note: Open Street Map is completely free but to use Bing Map or Google Map, you must have a Bing and/or Google key. You can get a free key of each on their websites

https://assetstore.unity.com/packages/tools/terrain/mapextractor-190964