> In Mercator distance is constant independent of orientation, isn't it? I don't know what you mean exactly. If you use JOSM with the Mercator projection and draw a perfect circle in the North of Sweden, you are actually drawing a horizontal ellipse (east-west oriented) in the real world. Lucas Juan Lucas Domínguez Rubio Prodevelop SL, Valencia (España) Tlf.: 96.351.06.12 -- Fax: 96.351.09.68 http://www.prodevelop.es <http://www.prodevelop.es/>
________________________________ De: [EMAIL PROTECTED] en nombre de David Earl Enviado el: mar 25/03/2008 18:30 Para: Andy Robinson (blackadder) CC: talk@openstreetmap.org Asunto: Re: [OSM-talk] JOSM and scale 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
_______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
