I am have just started again after a break of about a year or so. I am in Cambridge, and generally wardrive while ferrying the kids to their activities, plus a little warwalking at lunch time.

Has anyone played around with differential GPS? I need it because the accuracy of data that I am putting into wiglenet is embarrassing. Perhaps wigle should have a field in the data that indicates the certaintly of location. The locations you submit for an AP may not be the same as the ones you get ...