[MapProxy] Issue with WMS Imagery Recoloring

[Tom Batkiewicz]

On Thu, Apr 14, 2011 at 2:24 AM, Oliver Tonnhofer <olt at omniscale.de> wrote:

>
> On 13.04.2011, at 22:34, Tom Batkiewicz wrote:
>
> > Hi all,
> >
> > Having an issue with some images I'm caching and re-aligning using
> mapproxy 1.0.
> >
> > When the query goes out from mapproxy, it looks something like the
> following.  Everything looks fine on the source/cache side as this is what I
> expect to see (the image in question is a heightmap)
> >
> http://wms.jpl.nasa.gov/wms.cgi?request=GetMap&layers=us_ned&srs=EPSG:4326&width=300&height=300&format=image/png&styles=feet_short_int&bbox=-125.000000,7.333333,-82.333333,50.000000
> > http://img600.imageshack.us/img600/4759/wmsp.png   (I uploaded this
> image from my cache)
> > 2011-04-13 14:04:25,398 - INFO - 6600:mapproxy.client.http.http:_log -
> wms.jpl.nasa.gov - - [13/Apr/2011:14:04:25 ] "GET
> /wms.cgi?request=GetMap&layers=us_ned&srs=EPSG:4326&width=300&height=300&format=image/png&styles=feet_short_int&bbox=-125.000000,7.333333,-82.333333,50.000000
> HTTP/1.1" 200 58469 "-" ""
> >
> > However, whenever I query mapproxy with the bbox aligned as I need it,
> the image returned is almost entirely white (destroying the heightmap values
> I need)
> >
> >
> http://127.0.0.1:8080/service?SERVICE=WMS&REQUEST=GetMap&VERSION=1.3.0&WIDTH=256&HEIGHT=256&BBOX=20,-125,55,-60&CRS=EPSG:4326&FORMAT=image/png&LAYERS=us_ned&STYLES=&TRANSPARENT=FALSE
> > http://img709.imageshack.us/img709/9559/service.png (This is the image
> returned by the above query)
> > 127.0.0.1 - - [13/Apr/2011:15:21:51 -0500] "GET
> /service?SERVICE=WMS&REQUEST=GetMap&VERSION=1.3.0&WIDTH=256&HEIGHT=256&BBOX=20,-125,55,-60&CRS=EPSG:4326&FORMAT=image/png&LAYERS=us_ned&STYLES=&TRANSPARENT=FALSE
> HTTP/1.1" 200 8218 "-" "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US)
> AppleWebKit/534.16 (KHTML, like Gecko) Chrome/10.0.648.204 Safari/534.16"
> >
> > It looks like mapproxy is attempting to recolor the image in some way -
> is there any way to disable that behavior?
>
> Try to disable paletted images:
>
>  globals:
>    images:
>      paletted: false
>
> This is only configurable on a global level.
>
>
No luck - this doesn't seem to have any effect on the issue.
Also, based on your comment from IRC I tried requesting tiff and jpeg; but
this also had no effect.

-- 
Tom Batkiewicz
Software Engineer, Priority 5
http://www.priority5.com/

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