Mike, Did you experience the same problem when calling tile.php directly when rendering an individual tile?
Best regards, Tamas 2008/8/19 Mike Leahy <[EMAIL PROTECTED]>: > Hello list, > > I'm wondering if anyone can help me figure out a problem I'm having with > corrupted output from from a tiled geotiff dataset I'm using in a ka-Map > environment. You can see what's happening to the imagery here: > http://img527.imageshack.us/my.php?image=corrupthd1.png > > This generally happens when I'm zoomed in fairly close, and usually with > this high-resolution image dataset. However, I can get corrupted output for > other raster datasets (all geotiff, but not always tiled). It seems to > happen when the machine is processing most intensively (i.e., usually when > the imagery is being rendered by ka-Map). It also seems to be limited to > the laptop I am using, which is running F7-x86_64. In contrast, I have an > actual server (F8-x86_64), which has a virtually identical setup (with > respect to MapServer and its various dependencies), but with lots more cpu > cores and ram, and it's having no trouble at all (as far as I have noticed). > > The corruption in the output from the same application my laptop is not > always the same - if I clear the cache for ka-Map and re-render the images, > I'll get similar artifacts appearing in the output (red, green, blue and/or > black rectangles), but they will vary in size and location. It happens for > both GD/AGG drivers, and JPEG/PNG output formats. > > Until now, I figured it was just a problem with limited memory on my laptop > (it was always around 100% when rendering this imagery on the web service + > viewing the application in a browser), but now I've upgraded the ram - > there's plenty of spare room and I'm still getting the same problem. I just > finished upgrading Gdal from 1.5.0 to 1.5.2, and that didn't help any. > > Basically, the only real differences I can think of between my laptop and my > server are the number of cpu cores (1 on my laptop vs. 8 on the server), and > possibly the versions of some of the underlying libraries in the system. > Does anyone know where I should start looking to find the cause of this? > Or perhaps somebody recognizes this problem, and knows what I might be > doing wrong... > > Thanks for any suggestions, > Mike > > _______________________________________________ > mapserver-users mailing list > mapserver-users@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/mapserver-users > _______________________________________________ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users