Geographic coordinate system with the wgs84 datum - EPSG: 4326
Google Maps
Projected coordinate system that is based on the wgs84 datum - EPSG: 3857
Open Street Map database
A gcs with units decimal degrees & datum of wgs84 - EPSG: 4326
Open Street Map tiles and WMS webservice
Projected coordinate system that is based on the wgs84 datum - EPSG: 3857
Toutes les références spatiales sur http://spatialreference.org/
