Simple example that allows to create/edit and import/export GeoJSON data by using the Google Maps JavaScript API.
- https://developers.google.com/maps/documentation/javascript/tutorial
- https://developers.google.com/maps/documentation/javascript/reference/3.39/map?hl=en
- https://developers.google.com/maps/documentation/javascript/reference/3.39/data?hl=en#Data.StyleOptions
- https://developers.google.com/maps/documentation/javascript/reference/3.39/info-window?hl=en