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Google Maps + Biking
Combining the publicly available information about Google Maps, a copy of the Census Bureau's TIGER database imported into PostgreSQL, some Python hacking, and general navigational memory, I now have bike trips projected on to Google Maps.
The big problem right now is TIGER's view of the world being slightly different from Google's; if you zoom in a lot, you can see the points not lining up. Also, look at the bridge between Salem and Beverly in the Rockport trip, which follows TIGER's reality and not Google's. (I also found one bug in TIGER/Line 2003, which I should figure out how to report.) There are also limits (in some cases the Google Maps JavaScript hangs, I'm not sure when but trimming out points seems to help), and a report that this doesn't work under IE.
The big problem right now is TIGER's view of the world being slightly different from Google's; if you zoom in a lot, you can see the points not lining up. Also, look at the bridge between Salem and Beverly in the Rockport trip, which follows TIGER's reality and not Google's. (I also found one bug in TIGER/Line 2003, which I should figure out how to report.) There are also limits (in some cases the Google Maps JavaScript hangs, I'm not sure when but trimming out points seems to help), and a report that this doesn't work under IE.