Hello list! Many thanks to Jacques Paris, Patrick Phillips, Alex Teleshev and Ahmet Dabanli who answered to my question quoted below. In the end it turned out that my MapBasic code was OK. The "distortions" I observed have not been caused by a wrong code but by the map`s projection. I include the answers of Jacques Paris which have been very helpful to me. Thanks a lot! Holger Sternad [EMAIL PROTECTED] ------------------------------------------------------------------------ Here is what I did in the Mapbasic window, with the original map as frontwindow() dim win as integer win=frontwindow() run command windowinfo(win,15) That will clone the map. The clone is the front window, rerun win=frontwindow(). Then a long one set map window win center((mapperinfo(win,3)+mapperinfo(win,5))/2, (mapperinfo(win,4)+mapperinfo(win,6))/2) zoom mapperinfo(win,1)/2 Et voil�! Jacques PARIS Jacques, ... But as you can see from the screenshot attached to this e-mail (not attached in this summary!) the content of the smaller window does not exactly coincide with the map shown by the original window. (You can clearly see it by looking at the vertical lines.) Somehow the content of the cloned window gets distorted. ... Holger Holger, I will make a guess that your map is in some kind of un-projected coordinate system (degrees of lon/lat). That would explain your "distortions". To display them, MI must project those maps on the screen somewhat and as the centre of the 2 mappers are not the same ... Ah! why don't we live on a flat world? ... ------------------------------------------------------------------------ original question: I have tried to solve this problem - without success. Hopefully anyone has a solution for this: What I`m trying to do is to generate a new map window which displays an area limited by the coordinate values of the lower left corner of an existing map window on the one hand and the center of the existing window on the other hand (i.e. the area displayed in the new window will be a quarter of the original area): ********* * * *---| * * | * ********* *: existing map window -: new map window I can create a new window, set the new window size and use the "set map zoom"-command without problems and therefore I am able to generate a map window which has the same scale as the original window and the size that I need. But as soon as I use "set map pan" to move the map view the map in the new window gets somehow distorted and does not coincide with the corresponding part of the original view any more. ---------------------------------------------------------------------- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
