I've installed MapWindow and compared it with uDig both using the same dataset (a pretty large polygon shapefile). Now I'm sure your concerns are 90% about perceived performance. MapWindow seems _very_ sligtly faster anyways, completely disregardable though. The point is completely related to the feeling of responsiveness due to the lack of flickering.
On Thursday 20 July 2006 15:44, Gabriel Roldán wrote: > On Thursday 20 July 2006 10:04, [EMAIL PROTECTED] wrote: > > Hi, > > I tried Udig. It is good, but the repaint of the map is very slow. > > I would like to know, if this problem is caused that Java is used, or bad > > algorithm and if this problem will be solved. I noticed that all map is > > repainted. > > But I tried for example software Map Window GIS > > (http://www.mapwindow.org) and this software paints only a missing part > > of map, when I use function pan for moving map.(This software is not > > written in Java.) > > I don't know MapWindow, so if you perceive a tiled rendering on it I might > be just wrong, but this sounds to me like just a matter of "preceived > performance" rather than effective performance, and its certainly something > we could improve in uDig. > what I mean is that, from my experience, a panning interaction benefits > from not presenting any flickering on the image drawn while rebuilding the > whole map image in the background. Instead, uDig displays a blank image > when you release the moue on a panning action, and this leads to a > "feeling" of slowness, while when this doesn't happens, the user gets the > "feeling" of greater responsivenes. > > But as said, I could just be wrong. > > 2c. > > Gabriel > > > Thank you for your answer. > > _______________________________________________ > > User-friendly Desktop Internet GIS (uDig) > > http://udig.refractions.net > > http://lists.refractions.net/mailman/listinfo/udig-devel -- Gabriel Roldán ([EMAIL PROTECTED]) Axios Engineering (http://www.axios.es) Tel. +34 944 41 63 84 Fax. +34 944 41 64 90 _______________________________________________ User-friendly Desktop Internet GIS (uDig) http://udig.refractions.net http://lists.refractions.net/mailman/listinfo/udig-devel
