I've been meaning to get in touch with Tracks4Africa. This month, they're a Featured Layer in Google Earth, and have a lot of good data.
They operate differently from OpenStreetMap. They accept GPS track contributions from their community, apparently run an algorithm to derive "spatial averages" of the tracks, and make that derived data available for community members only, for personal use only. In fact, that data is not to be used for any other purpose than verifying your uploads.
They (Tracks4Africa people, not the community) then add metadata, producing a navigable map dataset with features, and market that commercially.
It's an interesting twist. Suppose they are doing well, with the Google Earth tie in and all. Wonder ultimately what would keep the community from contributing their tracks to OpenStreetMap as well. Would be great to find a way to work with them.
----- Original Message ---- From: John Fagan <[hidden email]> To: [hidden email] Sent: Monday, November 27, 2006 4:11:14 PM Subject: [OSM-talk] Tracks4Africa
Would be neat if these guys would contribute to OSM.