by i_do_dew » Wed Sep 28, 2011 5:42 am
Likewise you could generate your own by uploading and downloading parts of OpenStreetMap.org. They have a good part of the world mapped already and are constantly updating more. I use them as a better reference than TIGER which is at worst 10 years out of date.
The other downside to TIGER is something that I presume is the case, but I have not been able to confirm. TIGER is maintained by the Census, I suspect that local government uses TIGER to apply for Federal and State Highway funds. As a result new roads are added but almost none are removed, even when they have been closed to all sorts of traffic, or in some cases, never even built. Google caught some when they did their wardriving/picture taking, for street view, but by no means did they catch all. Also TIGER lists some things that are roads technically, as they are named, but in OSM you can edit them to say they are a single track high clearance vehicles only type seasonal road. In the US, OSM does do occasional TIGER imports.
WiGLE....