<HTML dir=ltr><HEAD><TITLE>Re: [OSM-talk] JOSM and scale</TITLE>
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<DIV dir=ltr><FONT face="Times New Roman" color=#000000 size=3>> In Mercator distance is constant independent of orientation, isn't it?</FONT></DIV>
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<DIV dir=ltr><FONT face="Times New Roman" color=#000000 size=3>I don't know what you mean exactly.</FONT></DIV>
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<DIV dir=ltr><FONT face="Times New Roman" color=#000000 size=3>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.</FONT></DIV>
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<DIV>Lucas</DIV></DIV></FONT></DIV>
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<DIV>Juan Lucas Domínguez Rubio<BR>Prodevelop SL, Valencia (España)<BR>Tlf.: 96.351.06.12 -- Fax: 96.351.09.68<BR><A href="http://www.prodevelop.es/">http://www.prodevelop.es</A></DIV></DIV>
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<FONT face=Tahoma size=2><B>De:</B> talk-bounces@openstreetmap.org en nombre de David Earl<BR><B>Enviado el:</B> mar 25/03/2008 18:30<BR><B>Para:</B> Andy Robinson (blackadder)<BR><B>CC:</B> talk@openstreetmap.org<BR><B>Asunto:</B> Re: [OSM-talk] JOSM and scale<BR></FONT><BR></DIV>
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<P><FONT size=2>On 25/03/2008 17:16, Andy Robinson (blackadder) wrote:<BR>> Vector editing software such as CAD packages are normally scale free at the<BR>> editing level. The co-ordinates are simply sufficient, especially if you<BR>> have the ability to draw a vector a specific distance from a point as a<BR>> polar ray or snapped relative to something else. Its only at plot time do<BR>> you decide what scale you wish to make your view. Perhaps if JOSM worked the<BR>> same way there would really be no need for a scale bar, especially when the<BR>> scale bar needs to read differently for vertical and horizontal projection<BR>> distances.<BR><BR>I disagree. I often dictate 'postbox 10m after junction' or '... set<BR>back 30m from road' by my estimate, and I need to see what that amounts<BR>to in JOSM - though apparently I have been misled so far! Which would<BR>explain why my estimates haven't seemed to correspond to reality sometimes.<BR><BR>In Mercator distance is constant independent of orientation, isn't it?<BR><BR>David<BR><BR><BR>_______________________________________________<BR>talk mailing list<BR>talk@openstreetmap.org<BR><A href="http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk">http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk</A><BR></FONT></P></DIV></BODY></HTML>