"Geographic information system"
CL has lots of toy maps (of US states, Norway, the Volga River, ...) written as Tcl programs, with "live" canvases, ... He's trying to figure out how to package them so others can see them. A hint of what's possible appears in "Open Cartography" [L1 ].
In 2005-2006, there's been an explosion of useful 'Net resources. See, for example, http://www.geonames.org/
Zarutian is thinking about scanning and vectorizing several free maps of Iceland's Captialzone (?? Capital city/zone ??).