On Wed, 29 Apr 2009 11:25:20 +0100 mle <i...@dynoyo.plus.com> wrote: > I was staying very near the east coast, and noticed that tracks near > the coast appeared too far inland (further west than expected) when > the GPS tracks were plotted. They also seemed too far inland when > looking at the Yahoo background layer in Potlatch.
Align the Yahoo imagery with your traces, as it's not always aligned correctly initially. The imagery only ever gives an idea of what is on the ground, we don't the state of the tide when the imagery was taken, there may have been coastal erosion or sea rising/falling since then, etc. You seem confident that your traces are accurate, don't worry about editing existing coastline data if you believe it is incorrect. And remember the coastline should show the mid-tide level. -- Alice _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
