Hi,
FYI Jürgen has pushed a patch into master making add the dpi an option.
Switching it off should display any maps 1.8 could display.
Advanced users may also add their desired vendor options or additional
paramters to the server's URL by themselves, e.g. if one needs another
dpi than screen resolution for printing reasons.
Bernhard
Am 22.10.2013 15:58, schrieb Jukka Rahkonen:
Richard Duivenvoorde<rdmailings@...> writes:
On 21-10-13 20:07, Miguel Ángel Castro wrote:
I am using QGIS 2.0.1 standalone installed in a Windows 7 64 bits system.
Example of WMS datasource: (datasource WMS 1.1.1) EPSG:32628
http://idecan2.grafcan.es/ServicioWMS/EspNat
In layer properties/metadata you can see the information from
datasource, but no display the layer (not load data) in canvas.
In log messages: Map request error (status: 200 .... getDouble(): Symbol
definition error. Parsing error near (96): (line 1).
Does anybody have an idea what is the problem?
Hi Miguel,
the error message that you see is a (Minnesota) Mapserver error message.
Somewhere in the style definitions it expects a number (or not).
This url I get from QGIS in debug mode, and gives you your error:
http://idecan2.grafcan.es/ServicioWMS/EspNat?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&BBOX=152208.544610834447667,2940195.98510535480454564,692329.70807293173857033,3376338.62686863588169217&SRS=EPSG:32628&WIDTH=670&HEIGHT=541&LAYERS=EENN&STYLES=&FORMAT=image/png&DPI=96&MAP_RESOLUTION=96&TRANSPARENT=TRUE
Bug if I remove the "&DPI=96&MAP_RESOLUTION=96" part from it, I get a map:
http://idecan2.grafcan.es/ServicioWMS/EspNat?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&BBOX=152208.544610834447667,2940195.98510535480454564,692329.70807293173857033,3376338.62686863588169217&SRS=EPSG:32628&WIDTH=670&HEIGHT=541&LAYERS=EENN&STYLES=&FORMAT=image/png
I'm not familiar with the exact WMS-standard, but as most WMS servers I
know (and use) can handle these two query parameters from QGIS, I think
it is a Mapserver configuration problem/error. You cannot let QGIS
remove those params I think.
Hi,
That certain server is a pretty old Mapserver v. 5.0 and it does not like
the non-standard vendor parameter&MAP_RESOLUTION=96. Fresh Mapservers do
not fail because of that and actually since version 6.0 Mapserver supports
vendor option MAP_RESOLUTION.
According to WMS standard servers should quietly skip extra parameters so
principally there is a bug in Mapserver 5.0. However, I do not like that
QGIS is adding always its own vendor parameters and users do not have a way
to turn off the non-standard parameters. I have two reasoning for this:
1) MAP_RESOLUTION is not defined in the standard and for server A it can
mean something different than for server B while QGIS may be awaiting still
something else.
2) Even vendor options should be skipped, we have here an example that some
servers may fail in skipping them. Nobody will fix Mapserver 5.0 and even it
is wrong, it is the QGIS user who suffers now. User can only ask server
admin to update (it may take a while) or switch off QGIS and use another WMS
client like OpenJUMP.
For my mind it should be possible to configure QGIS WMS to run in a safe
mode and use only those parameters which belong to WMS standard.
-Jukka Rahkonen-
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