On Sun, Dec 02, 2007 at 09:08:04PM +0100, Andrea Aime wrote: > Christopher Schmidt ha scritto: > >On Sun, Dec 02, 2007 at 05:52:59PM +0100, Andrea Aime wrote: > >>Hi Chris, > >>about this scale inconsistency, you're right in saying it's due to the > >>DPI. The WMS standard suggests a DPI of approximately 90 (well, a > >>multiplication factor of 0.28 in fact), and that's what GeoServer is > >>using to compute the scale. > >>To be exactly true to the WMS standard (as far as I understand it) the > >>setting would have to be: > >> > >>OpenLayers.DOTS_PER_INCH = 25.4 / 0.28; > > > >I'm not sure where the 25.4 comes from > > As far as I remember, it's the conversion between millimeters and inches > (25.4 millimiters to make an inch). >
Interesting. So it's assuming a .28mm dot pitch or something like that. Still not based in some kind of 'global' reality which is always true, but at least it's not based on print :) Regards, -- Christopher Schmidt MetaCarta _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
