Google Maps - Capturar geojson(bounds) de cidades, estados e etc.

README.md

Google Maps - Capturar geojson(bounds) de cidades, estados e etc.

You can get polygon coordenates in json for using with googlemaps using openstreetmap.

• Go to http://nominatim.openstreetmap.org/ search a place like "Partido de Ituzaingó"
• click on "details"
• Look for OSM ID and copy it (control+c), example: 2018776
• Paste the ID in http://polygons.openstreetmap.fr/index.py and download the polygon

Get in json

• To get polygon boundaries just add format=json to your request!
• So instead of https://nominatim.openstreetmap.org/search.php?q=Warsaw+Poland&polygon_geojson=1
• Use https://nominatim.openstreetmap.org/search.php?q=Warsaw+Poland&polygon_geojson=1&format=json
• By adding &format=geojson you can get a valid geojson response
• Only add format=json into url param

Fonte

• https://gis.stackexchange.com/questions/183248/getting-polygon-boundaries-of-city-in-json-from-google-maps-api