Provider | Service type | Usage restrictions | Required attribution | Request URL or template |
---|---|---|---|---|
OpenStreetMap | Tiles | Free to use with attribution | © OpenStreetMap contributors | http://{s}.tile.osm.org/{z}/{x}/{y}.png |
USGS National Map | MapServer |
| USGS | http://basemap.nationalmap.gov/ArcGIS/services/USGSImageryTopo/MapServer/WMSServer |