[gdal-dev] GDAL & WMS

[Courtney Schitka]

Furthermore, when I do actually get a response. A lot of times GDAL fails to
load data and subsquent requests fail in a timely manner this time. What
seems to be happening. is that OnEarth is handing back a response to the
GDAL client and it's getting a 200 (So Gdal thinks everything is ok.
However inside of that XML response I would suggest the server is handing
back a "BAD RESPONSE" or a response that says the server cannot fulfill the
request. So GDAL takes that response and then tries to supply data from it.
Without looking indepth at what the actual response contains. I am not sure
if this is a problem at the GDAL driver level or an issue in the underlying
support libraries.

Courtney.

On Mon, Jun 30, 2008 at 5:18 PM, Even Rouault <even.rouault at mines-paris.org>
wrote:

> I've noticed that too and I think the problem is on the server side. The
> wms_4
> test from GDAL autotest takes a big amount of time before failing : the
> returned image from the NASA JPL server is 0 byte length.
>
> Here's the culprit WMS request :
>
> http://onearth.jpl.nasa.gov/wms.cgi?request=GetMap&version=1.1.1&layers=modis,global_mosaic&styles=&srs=EPSG:4326&format=image/jpeg&width=1024&height=1024&bbox=-180.00000000,89.86175997,-179.86175997,90.00000000
>
> If you modify it to only return the global_mosaic layer, the request
> returns
> in a few seconds, but the image is totaly black (probably OK for that part
> of
> the world ?).
>
> Le Monday 30 June 2008 23:10:01 Courtney Schitka, vous avez écrit :
> > Has anyone noticed a huge performance issue with GDAL and WMS lately ?
> I've
> > noticed a HUGE problems using the NASA JPL servers lately as in I can't
> > seem to get data from them or anything. GDAL hasn't been rebuilt
> recompiled
> > and the client code I am using hasn't changed at all either.
> >
> > Cheers
> > Courtney
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/gdal-dev/attachments/20080630/ca115a41/attachment.html