David Earl [mailto:[EMAIL PROTECTED] wrote: >Sent: 25 March 2008 5:30 PM >To: Andy Robinson (blackadder) >Cc: 'Frederik Ramm'; 'Lars Aronsson'; [email protected] >Subject: 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. >
That's a normal type of requirement in CAD too. You know you are 10 or 30m from another object so you use that object as the reference to draw the new object a set distance away using one of the tools. If you have those sorts of tools you find you don't need a distance/scale bar. Cheers Andy >In Mercator distance is constant independent of orientation, isn't it? > >David _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
