On Tue, Nov 24, 2009 at 12:10 AM, Karl Latham <[email protected]> wrote:
> Accuracy wise, the google map is outdated in my area, the school has > had old wasteground cleared to make up more grass area for them. The aerial photos on Google that I was comparing against are a few years old, so as previously indicated, you're the eyes on the ground. I don't trust the map database from TeleAtlas very much. I have been sending corrections to them for years trying to get the map database around my area closer to reality. The whole road grid for the Province of Alberta was offset by a couple hundred metres a few iterations back. The whole of Fort McMurray looked like someone had crinkled up the map, and then digitized the roads where they were while the map was still crinkled up. The roads were there, but they didn't reflect reality very well. After a couple years of hounding, the TeleAtlas database in my area is starting to reflect reality. OSM has TeleAtlas beat now with the GeoBase import. > Mapping has been done for the buildings, purely from waypoints, and > images taken on the ground, for most areas near buildings the GPS > tracks go crazy. You're surely earning your wages... that's more work than tracing things like buildings and grounds from aerial images, and using GPS tracks as positional confirmation. > Also I didn't do any of the roads in the area apart from 2 dead ends, > but I know that alot need redoing to be accurate, a job for the summer > I think. It's a long tedious process trying to get good maps created with limited resources. As long as you're having fun, and the map is getting better, everyone is happy. James VE6SRV _______________________________________________ newbies mailing list [email protected] http://lists.openstreetmap.org/listinfo/newbies
