[mapserver-users] Cascading WMS

[Daniel Morissette]

It is possible that the remote WMS server is returning an XML error,
which is not handled very nicely by MapServer 3.6.  You can try
including in your CONNECTION string a EXCEPTIONS=INIMAGE parameter so
that the error is returned in image format.  Or recompile your MapServer
using --enable-debug, and then look in the Apache error_log, you will
see the URL that MapServer calls when contacting the remote WMS server,
and if you call this URL in a web browser then you'll see what error is
being produced.

Daniel

P.S. I hope your CONNECTION string doesn't contain spaces like in the
example quoted in your Email.  If it does then theat could be the source
of your problems: make sure your CONNECTION parameter is a single string
with no space.


"Brachmann, Ellen" wrote:
> 
> Hallo,
> 
> I am a mapserver newby and have some problems with the cascading service.
> 
> The mapserver gave the following message during execution:
>  msDrawRaster(): Image handling error. Unrecognized or unsupported image
> format
> 
> We use the MS Version:
>  MapServer version 3.6.1 OUTPUT=PNG OUTPUT=WBMP SUPPORTS=PROJ SUPPORTS=TTF
> SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT INPUT=EPPL7 INPUT=SHAPEFILE
> 
> with the libraries:
>  PROJ-4.4.5
>  FREETYPE-2.0.5
>  GD-1.8.4
>  W3C-LIB-5.4.0
> 
> MS runs correctly without the cascading service with the Mapfile "lgb2.map".
> 
> The problematically part of the Mapfile is:
>  ...
>    LAYER
>      METADATA
>        "wms_title"   "Basistopographie"
>        "wms_srs"     "EPSG:25833"
>      END
>      NAME topographie
>      MINSCALE   50000
>      MAXSCALE 5000000
>      TYPE RASTER
>      STATUS ON
>      CONNECTIONTYPE WMS
>      CONNECTION
>        "http://pc661/cgi-bin/mapserv?map=wms/lgb2.map&VERSION=1.1.0& \
>         LAYERS=state,wood,towns,RiversCanals& \
>         FORMAT=image/png& \
>         TRANSPARENT=yes"
>      PROJECTION
>        "init=epsg:25833"
>      END
>    END
>  ...
> 
> And now my questions:
>  - Which tags are necessary for the CONNECTION call ?
>  - Where could the mistake been ?
> 
> Regards
> Ellen
> 
> Mapping Agency of Brandenburg
> Data Center