<html><head><meta http-equiv=Content-Type content="text/html; charset=iso-8859-15"><META name="Author" content="Novell GroupWise WebAccess"></head><body style='font-family: Tahoma, sans-serif; font-size: 13px; '>Hi Steve<br><br>Yes, the images are requested as tiles. I should probably try a standard (whole image) request or try shp2img to eliminate that possibility. The requesting software is OpenLayers. The website is using GeoWebCache to cache the tiles, but the test image supplied went directly from MapServer to OpenLayers.<br><br>I probably won't have time to look at this again until next week. I will keep the list up-to-date with my progress.<br><br>John Westwood<br><br><br>>>> "Lime, Steve D (DNR)" <steve.lime@state.mn.us> 15/06/11 4:24 PM >>><br>>From the sample it almost looks like the mapserver.jpg is the result of two images being overlayed either on the server (by mapserver) or in the client. The artifacts look like there's an offset applied to one of them because of the parallel lines. How are the images managed (perhaps as tiles)?<br><br>Steve <br><br>-----Original Message-----<br>From: mapserver-users-bounces@lists.osgeo.org [mailto:mapserver-users-bounces@lists.osgeo.org] On Behalf Of Frank Warmerdam<br>Sent: Wednesday, June 15, 2011 10:05 AM<br>To: John Westwood; MAPSERVER-USERS<br>Subject: Re: [mapserver-users] Rendering artefacts when serving raster via WMS<br><br>On 11-06-10 12:25 PM, John Westwood wrote:<br>> Does anybody have any ideas what the problem could be? I know it is something<br>> to do with the fact that I boosted the images and MapServer doesn't like them,<br>> but I would like to fix it. Suggestions greatly appreciated.<br><br>John,<br><br>I'm afraid I don't have much to offer. I just wanted you to know that<br>someone had looked at your post and had no bright ideas about why it is<br>happening. If this is quite important to you, you could file a ticket<br>on the issue, reducing it to a simple map file with one input GeoTIFF<br>and a request (ideally with shp2img) that produces the artifacted output.<br>Then I could dig into this from my end.<br><br>If you do that, you can directly assign the MapServer ticket to "warmerdam".<br><br>Best regards,<br>-- <br>---------------------------------------+--------------------------------------<br>I set the clouds in motion - turn up | Frank Warmerdam, warmerdam@pobox.com<br>light and sound - activate the windows | http://pobox.com/~warmerdam<br>and watch the world go round - Rush | Geospatial Programmer for Rent<br><br>_______________________________________________<br>mapserver-users mailing list<br>mapserver-users@lists.osgeo.org<br>http://lists.osgeo.org/mailman/listinfo/mapserver-users<br><br><br>_______________________________________________<br>mapserver-users mailing list<br>mapserver-users@lists.osgeo.org<br>http://lists.osgeo.org/mailman/listinfo/mapserver-users<br></body></html>