[mapserver-users] Rendering artefacts when serving raster via WMS

[John Westwood]

Hi Steve

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.

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.

John Westwood


>>> "Lime, Steve D (DNR)"  15/06/11 4:24 PM >>>
>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)?

Steve 

-----Original Message-----
From: mapserver-users-bounces at lists.osgeo.org
[mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Frank
Warmerdam
Sent: Wednesday, June 15, 2011 10:05 AM
To: John Westwood; MAPSERVER-USERS
Subject: Re: [mapserver-users] Rendering artefacts when serving raster
via WMS

On 11-06-10 12:25 PM, John Westwood wrote:
> Does anybody have any ideas what the problem could be? I know it is
something
> to do with the fact that I boosted the images and MapServer doesn't
like them,
> but I would like to fix it. Suggestions greatly appreciated.

John,

I'm afraid I don't have much to offer.  I just wanted you to know that
someone had looked at your post and had no bright ideas about why it is
happening.  If this is quite important to you, you could file a ticket
on the issue, reducing it to a simple map file with one input GeoTIFF
and a request (ideally with shp2img) that produces the artifacted
output.
Then I could dig into this from my end.

If you do that, you can directly assign the MapServer ticket to
"warmerdam".

Best regards,
-- 
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up   | Frank Warmerdam,
warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent

_______________________________________________
mapserver-users mailing list
mapserver-users at lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/mapserver-users


_______________________________________________
mapserver-users mailing list
mapserver-users at lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/mapserver-users

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/mapserver-users/attachments/20110616/40acc50e/attachment-0001.html