For topo maps, the following countries have made theirs available for non-commercial purposes as either a WMS or via an API:
- GB: Ordnance Survey OpenSpace API, which accesses a WMS tileserver; includes 1:50,000 Landrangers
- France: IGN géoportail API includes 1:25,000 maps
- Germany: see the Deutschlandviewer site for information on what layers are available as WMS; mainly Land-based
- Italy: Portale Cartografico Nazionale; includes 1:250,000, 1:100,000 and 1:25,000 topo maps (beware! many of the sheets are very old)
- Spain: all maps released as WMS/WFS server. This includes the autonomous regions, who also have their own WMS servers
- Czech Republic: 1:50,000, 1:500,000 and 1:1,000,000 maps available as WMS at Geoportál ČÚZK