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. <br>
<br>Courtney. <br><br><div class="gmail_quote">On Mon, Jun 30, 2008 at 5:18 PM, Even Rouault <<a href="mailto:even.rouault@mines-paris.org">even.rouault@mines-paris.org</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
I've noticed that too and I think the problem is on the server side. The wms_4<br>
test from GDAL autotest takes a big amount of time before failing : the<br>
returned image from the NASA JPL server is 0 byte length.<br>
<br>
Here's the culprit WMS request :<br>
<a href="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" target="_blank">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</a><br>
<br>
If you modify it to only return the global_mosaic layer, the request returns<br>
in a few seconds, but the image is totaly black (probably OK for that part of<br>
the world ?).<br>
<br>
Le Monday 30 June 2008 23:10:01 Courtney Schitka, vous avez écrit :<br>
<div><div></div><div class="Wj3C7c">> Has anyone noticed a huge performance issue with GDAL and WMS lately ? I've<br>
> noticed a HUGE problems using the NASA JPL servers lately as in I can't<br>
> seem to get data from them or anything. GDAL hasn't been rebuilt recompiled<br>
> and the client code I am using hasn't changed at all either.<br>
><br>
> Cheers<br>
> Courtney<br>
<br>
<br>
</div></div></blockquote></div><br>