I am sorry to see that you got surprised by it, but please note that it's NOT an SVG issue, it's true for any screen-drawing...
If you state that "mm (...) must be displayed exactly so on the screen - independent of the screen resolution or the display device", you are asking an impossible thing. It might calculate how many pixels theoreticaaly would go into a mm if the screen is supposed to have a 72 dpi resolution, but how is the application to know how big a pixel REALLY is on your screen...? It might be able (depending on the OS and so on) to find out to what resolution your graphics card is set and maybe even how large the screen is "supposed" to be, but as soon as somebody fiddles for example with the screen controls and changes the horizontal or vertical sync, or connects another type of monitor, the size of you rectangle would change! ____________________________ Barend Köbben International Institute for Geo-information Sciences and Earth Observation (ITC) PO Box 6, 7500AA Enschede (The Netherlands) ph: +31 (0)53 4874253; fax: +31 (0)53 4874335 _____________________________ -----Original Message----- From: kanmac1 [mailto:[EMAIL PROTECTED] Sent: Monday, 07 February 2005 11:53 To: svg-developers@yahoogroups.com Subject: [svg-developers] real world unit vs screen resolution or display device Hi all, PLS HELP!!!!!!! we've got a major problem with SVGs. It may have an absolutely distroying impact on our application. We use Adobe SVG Viewer 3.0 in the IE6.0. Our charts have fixed width and height given in real world units (like mm or px, - whatever) and they must be displayed exactly so on the screen - independent of the screen resolution or the display device parameters. Look at this. <svg width="200mm" height="200mm" viewBox="0 0 200 200"> <rect x="50" y="50" width="100" height="100" style="fill:red"/> </svg> I expected the ASV to show me always!!! a rectangle which is 10cm wide and 10 cm high and which starts exactly 5cm (on x-axis and y-axis) from the (0,0) point of the SVG coordinate system. If I display it on my monitor in the 1280x1024 resolution it looks pretty well. But if I change the resolution to 800x600 I see my rect has nothing to do with the dimensions I expected :( It's been a BIG surprise to us for last few days. I went through the SVG1.1. spec but I can't really get how to make my rect look always same (independent of the resolution and display device). I hope it is just a matter of proper setting of width, height and viewBox attributes on the outer-most svg element. Any help is welcome. And we need it ASAP. cheers Maciek ----- To unsubscribe send a message to: [EMAIL PROTECTED] -or- visit http://groups.yahoo.com/group/svg-developers and click "edit my membership" ---- Yahoo! Groups Links ----- To unsubscribe send a message to: [EMAIL PROTECTED] -or- visit http://groups.yahoo.com/group/svg-developers and click "edit my membership" ---- Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/svg-developers/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
