Hi Peter, This document:
http://svn.openstreetmap.org/applications/rendering/mapnik/zoom-to-scale.txt shows the relationship of zoom level to scale denominator. This blog post: http://www.britishideas.com/2009/09/22/map-scales-and-printing-with-mapnik/ shows how to get from bounding box to scale denominator and vice versa. Andy Peter Körner wrote: > Hello > > I'm writing on a simple Frontend for the mapnik-toolchain. Currently you > can call it like this: > > osm-render --bbox 8.2011,49.9649,8.3278,50.0327 --size 8192x4096 > > I'd like to add another option like this: > > osm-render --bbox 8.2011,49.9649,8.3278,50.0327 --zoom 14 > > The combination of bbox-size (in lat/lon or maybe kilometers?) and > output-size (in pixels) somehow leads to the ScaleDenominator used in > the mapnik style, so i think it could be calculated to a zoomlevel and > vice versa. > > Does anyone has a formular for that (especially bbox & zoom --> width & > height) or is this just not possible? > > Thank you, > Peter > > _______________________________________________ > dev mailing list > [email protected] > http://lists.openstreetmap.org/listinfo/dev > > > -- Andy PGP Key ID: 0xDC1B5864 _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/listinfo/dev
