[Gvsig_english] gvSIG Mobile workspace - getting "WMS image error" after trying to load files from WMS

[Juan Lucas Dominguez Rubio]

Hello, Marcel.
 
All the URLs in this message can be tested directly in a web browser. In one of my tests using a web browser, this URL returned a very ugly Java stack trace:
 
http://www.gis.nrw.de/wms/DGM50?REQUEST=GetCapabilities&SERVICE=WMS&EXCEPTIONS=XML
 
But in other attempts, the response was OK (a XML file with the server capabilities)
 
This request works too (using the German EPSG;31429):
 
http://www.gis.nrw.de/wms/DGM50?REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.0&LAYERS=DGM50&SRS=EPSG:31492&BBOX=2495820.074603175,5597231.470778579,2715995.7222222225,5803033.633983327&WIDTH=338&HEIGHT=317&FORMAT=image/jpeg&STYLES=&TRANSPARENT=TRUE
 
This request returns a blank image, which I think is caused by a bug in the WMS server:
 
http://www.gis.nrw.de/wms/DGM50?REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.0&LAYERS=DGM50&SRS=EPSG:4326&BBOX=6,50.5,8.5,53&WIDTH=300&HEIGHT=300&FORMAT=image/png&STYLES=&TRANSPARENT=TRUE
 
The coordinates of the requested box are BBOX=6,50.5,8.5,53 which I think are correct and that should return an overview of that German state. Here is an example using the same coordinates with a different WMS server:
 
http://osmwms.itc-halle.de/maps/osmfree?SERVICE=WMS&&REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.1&LAYERS=grenzen&SRS=EPSG:4326&BBOX=6,50.5,8.5,53&WIDTH=752&HEIGHT=499&FORMAT=image/jpeg&STYLES=default&TRANSPARENT=TRUE
 
So I think that WMS server says that it can provide maps in EPSG:4326, but it cannot, so you'll have to use EPSG;31429. Unfortunately, gvSIG Mobile 0.3 is unaware of that projection, so the GPS arrow will not be placed correctly. Distance and area measurements will work correctly as long as you choose a projection whose map unit is the meter (for example the Italian EPSG:3003)
 
I have tested that WMS server from the gvSIG Mobile 0.3 workspace in Eclipse and it worked fine choosing EPSG:31429. Have you tried that option? 
 
As for the log file, yes you are right, that problem should be more visible in the log file, that's our fault.
 
Go to Launcher.java and replace this line:
 
Logger.getRootLogger().setLevel(Level.WARN);
 
with:
 
Logger.getRootLogger().setLevel(Level.ALL);
 
Perhaps that'll show more messages.
 
 
Regards,
Juan Lucas Domínguez Rubio
---
Prodevelop SL, Valencia (España)
Tlf.: 96.351.06.12 -- Fax: 96.351.09.68
http://www.prodevelop.es <http://www.prodevelop.es/> 
---

________________________________

De: gvsig_internacional-bounces at listserv.gva.es en nombre de Schoolmeesters
Enviado el: jue 30/09/2010 14:21
Para: Users and Developers mailing list
Asunto: [Gvsig_english] gvSIG Mobile workspace - getting "WMS image error" after trying to load files from WMS



  Dear list,

anybody out there who has tried to load a WMS with the source code
running in Eclipse?

I've tested the downloadable WinXP version -> no problems apart from the
language which seems to be spanish only. However, that doesn't matter,
but I don't understand why my self-compiled version does not load any
WMS image. Is it possible that the SVN version is not the current
version? Or did I forget to include something?


Best regards,

Marcel Schoolmeesters
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