Mike, It's quite difficult to find out what's going on. You should file a ticket including the example and sample data. Probably the problem may be reproduced in other machines as well.
Best regards, Tamas 2008/8/19 Mike Leahy <[EMAIL PROTECTED]>: > Tamas, > > I just gave this a try a few times - deleted the cache, and loaded one tile. > It seems to happen less frequently, but I still have about a 1 in 3 chance > of getting various rectangle artifacts on the image. It basically looks > like something forgets to draw one or more of the rgb colours. > > Mike > > Tamas Szekeres wrote: >> >> 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