while we are at it, imagine the following situation: mapper A, by means of DGPS, MilStd GPS, crystal ball etc., is able to achieve an accuracy of, say, a few centimeters and uses it to add new nodes (POIs) to OSM.
some time later, mapper B with his/her ancestors mechanical GPS device (*), achieving an accuracy of max., say, 15 meters, surveys the same area, figures out that (by his/her point of view) POIs added by mapper A are 15 meters off and corrects their location. what is needed here is some tag, saying "don't touch these coordinates, they've been surveyed with high(est) accuracy". I heard this argument from an pipeline expert, noting that marker surveyed with consumer GPS are (for their standards) way off their real location. maybe this is a non-issue after all, if consensus is that consumer GPS accuracy is sufficient enough. cu (*) http://www.kenalder.com/measure/excerpts.htm _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
