WMS sources

We can only use WMS sources that are in the public domain, compatibly licensed, or we have permission to use. These include Landsat, USGS High Resolution Orthoimagery (~15cm resolution), National Agriculture Imagery Program (NAIP) 1-meter imagery, and Yahoo! Aerial Imagery.

Worldwide

• Yahoo! Aerial Imagery

• NASA Landsat - Public Domain low resolution satellite imagery. Worldwide coverage, but generally too low-res for tracing roads or other such details.

• OpenAerialMap: This is currently offline, but if/when this project is resuscitated it provides open aerial imagery compiled from many sources/imagery donations.

• Grassroots Mapping (very few maps nowadays)

United States

• USGS High Resolution Orthoimagery (~15cm resolution)

• National Agriculture Imagery Program (NAIP) 1-meter imagery

• New Jersey 2007 aerial photography. Only available within and slightly overlapping the borders of New Jersey. There are no restrictions on its use.

Europe

Germany

• De:DOP Sources - List of DOP sources for Germany and their status of permission to use in OSM

Italy

• WikiProject_Italy/PCN: Covering all of Italy with good ortho-rectification and far better resolution than Yahoo (please don't trace from Yahoo in Italy for this reason, as there is a big offset)

Spain

• Spain Potential Datasources: covers a potential datasources of Spain

UK

• New Popular Edition - Out-of-copyright maps from 1950s or earlier from http://www.npemap.org.uk/ (UK only). Note that NPEmaps supplied as a WMS have not been as thoroughly rectified as those presented within Potlatch. This means you should not use NPE Maps within JOSM except as a rough guideline. When tracing over NPE maps use Potlatch for better accuracy.
• Provisional/First Edition - Out-of-copyright maps from 1950s or earlier from scans of First Edition Maps.