On 25/03/2008 17:16, Andy Robinson (blackadder) wrote: > Vector editing software such as CAD packages are normally scale free at the > editing level. The co-ordinates are simply sufficient, especially if you > have the ability to draw a vector a specific distance from a point as a > polar ray or snapped relative to something else. Its only at plot time do > you decide what scale you wish to make your view. Perhaps if JOSM worked the > same way there would really be no need for a scale bar, especially when the > scale bar needs to read differently for vertical and horizontal projection > distances.
I disagree. I often dictate 'postbox 10m after junction' or '... set back 30m from road' by my estimate, and I need to see what that amounts to in JOSM - though apparently I have been misled so far! Which would explain why my estimates haven't seemed to correspond to reality sometimes. In Mercator distance is constant independent of orientation, isn't it? David _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
