Triangulations: March 27

Jeff Thurston’s contribution to the debate over free geodata looks at the question of scale: if you want geospatial data to be free and updated regularly, consider the huge amount of territory that has to be mapped.
Wired’s piece, Map Mashups Get Personal, looks at Platial, a service that touts personal Google Maps mashups. An awful lot of services built on that single API, methinks.
Glenn Letham is wondering whether he should flip the switch and move to another blog he’s got on another service — Anything Geospatial.
A pro-Iranian-government web site has a review of Cyrus Alai’s General Maps of Persia, 1477-1925 (see previous entry).
A tutorial on how to make GPS-enabled trail maps using a handheld GPS unit and Topofusion. Via MAKE: Blog.

The Map Room