On Fri, Jul 23, 2010 at 14:15, Frederik Ramm <[email protected]> wrote:
> Hi, > > > Chris Browet wrote: > >> Why?. Each display/printer/raster defines a DPI, doesn't it? >> > > Yes. What I wanted to say is, a PNG image (or other bitmap) can never have > a map scale. Once you print it out on paper or show it on a screen, it has > one. The map scale of the same PNG image will be vastly different - by a > factor of easily 4 or more - whether you print it on a laser printer, view > in on a standard desktop screen, or view in on your iPhone 4. True. However, what is done with a bitmap generated from a MapCSS stylesheet is out of scope of MapCSS, IMHO. The PNG should still has a DPI and the device on which it will be used, too. It is then up to the program doing the interface to handle the DPI differences... - Chris -
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