2009/9/1 Ed Avis <e...@waniasset.com>: > Oh I see. In that case, like geoid undulation, it is better to get the user > to > specify the GPS device they used to make the trace. If it's one that has a > barometer, then prompt further: > > ( ) Altimeter switched off > ( ) Altimeter on, but not calibrated recently > ( ) Altimeter on and calibrated > ( ) Don't know > > My device has an altimeter but I rarely calibrate it because I didn't realize > altitude data was that useful for OSM. However, a recent trip to Edinburgh > (where there are lots of streets crossing above each other) has made the > usefulness of 3D map data more apparent.
yes. The thing is, that even uncalibrated barometric data is more useful, because the relative elevation differences still are more precise than GPS. cheers, Martin _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
