Hi Etienne,
Thanks a lot for the detailed followup! As a mere QGIS user, I don't
feel comfortable to build it from source.
In the log that you shared with us, I don't see any clue pointing to
what could be the reason for the error. Did you get that
"Map request error : Response: ?PNG"
dialog box? That's the error I get and trying to fix.
While the WMS errors were recently improved
(http://lists.osgeo.org/pipermail/qgis-commit/2011-April/006800.html ),
this is still a cryptic error message from QGIS.
Thanks for any further feedback!
Alex
Alexandre Leroux, M.Sc., ing.
MSC Data Management Section /
Section de gestion des données du SMC
Canadian Meteorological Centre / Centre météorologique canadien
Environment Canada / Environnement Canada
[email protected] - (514) 421-5024
On 04/18/12 14:26, Etienne Tourigny wrote:
Alexandre.
First thing to look at is the "Log Messages" panel, but in this case
it shows nothing.
The proper way to see (very) verbose error output is to compile QGis
in "Debug" mode.
Basically you need to add the following option to cmake:
-DCMAKE_BUILD_TYPE=Debug
More details at http://hub.qgis.org/wiki/quantum-gis/Building_QGIS_with_CMake
For OSX specific info, see http://www.kyngchaos.com/macosx/index
I am not sure if there are debug builds out there...
Attached is the error log when adding a png layer from your server
Here is the most relevant part:
Debug: src/providers/wms/qgswmsprovider.cpp: 507: (draw) getmap:
http://wms.weatheroffice.gc.ca/geomet/?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&BBOX=-179.000000,27.988827,-39.000000,80.000000&SRS=EPSG:4326&WIDTH=1024&HEIGHT=380&LAYERS=CAPA.6P_PR&STYLES=PRECIPCM&FORMAT=image/png&DPI=96&TRANSPARENT=TRUE
Debug: src/core/qgsnetworkaccessmanager.cpp: 61: (queryProxy) using
user proxy for
http://wms.weatheroffice.gc.ca/geomet/?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&BBOX=-179.000000,27.988827,-39.000000,80.000000&SRS=EPSG:4326&WIDTH=1024&HEIGHT=380&LAYERS=CAPA.6P_PR&STYLES=PRECIPCM&FORMAT=image/png&DPI=96&TRANSPARENT=TRUE
Debug: src/providers/wms/qgswmsprovider.cpp: 710: (readBlock) image
height = 380 bytesPerLine = 4096
Debug: src/core/raster/qgsrasterlayer.cpp: 4813: (createNextPartImage) Entered
Debug: src/core/raster/qgsrasterlayer.cpp: 4840: (createNextPartImage)
mCurrentPartRasterMin = 0
Debug: src/core/raster/qgsrasterlayer.cpp: 4841: (createNextPartImage)
imageX = 25 imageY = 242
Debug: src/core/raster/qgsrasterlayer.cpp: 4852: (createNextPartImage)
mCurrentPartRasterMax = 380 mViewPort->drawableAreaYDim = 380
Debug: src/core/raster/qgsrasterlayer.cpp: 959: (draw) raster draw
time (ms): 207
Debug: src/core/raster/qgsrasterlayer.cpp: 794: (draw) exiting.
Debug: src/core/qgsmaprenderer.cpp: 514: (render) Layer rendered without issues
Debug: src/core/qgsmaprenderer.cpp: 554: (render) Done rendering map layers
Debug: src/core/qgspallabeling.cpp: 1108: (drawLabeling) LABELING
work: 0 ms ... labels# 0
Debug: src/core/qgspallabeling.cpp: 1231: (drawLabeling) LABELING draw: 0 ms
Debug: src/core/qgsmaprenderer.cpp: 632: (render) Rendering completed
in (seconds): 0.224
Debug: src/providers/wms/qgswmsprovider.cpp: 1098:
(cacheReplyProgress) 608 of 11382 bytes of map downloaded.
Debug: src/providers/wms/qgswmsprovider.cpp: 1098:
(cacheReplyProgress) 1632 of 11382 bytes of map downloaded.
Debug: src/providers/wms/qgswmsprovider.cpp: 1098:
(cacheReplyProgress) 2656 of 11382 bytes of map downloaded.
Debug: src/providers/wms/qgswmsprovider.cpp: 1098:
(cacheReplyProgress) 3680 of 11382 bytes of map downloaded.
Debug: src/providers/wms/qgswmsprovider.cpp: 1098:
(cacheReplyProgress) 4704 of 11382 bytes of map downloaded.
Debug: src/providers/wms/qgswmsprovider.cpp: 1098:
(cacheReplyProgress) 5728 of 11382 bytes of map downloaded.
Debug: src/providers/wms/qgswmsprovider.cpp: 1098:
(cacheReplyProgress) 7776 of 11382 bytes of map downloaded.
Debug: src/providers/wms/qgswmsprovider.cpp: 1098:
(cacheReplyProgress) 9824 of 11382 bytes of map downloaded.
Debug: src/providers/wms/qgswmsprovider.cpp: 1098:
(cacheReplyProgress) 10848 of 11382 bytes of map downloaded.
Debug: src/providers/wms/qgswmsprovider.cpp: 1098:
(cacheReplyProgress) 11382 of 11382 bytes of map downloaded.
Debug: src/providers/wms/qgswmsprovider.cpp: 911: (cacheReplyFinished)
contentType: IMAGE/PNG
Debug: src/app/qgscustomization.cpp: 778: (customizeWidget) objectName
= QgsMessageViewer event type = 17
Debug: src/app/qgscustomization.cpp: 780: (customizeWidget)
QgsMessageViewer x QDialog
Etienne
On Wed, Apr 18, 2012 at 10:10 AM, Alexandre Leroux
<[email protected]> wrote:
Hi list!
I'm getting an error message when trying to display a WMS layer from a
specific provider with QGIS 1.7.4 on MacOS X. The GetCapabilities works fine
but when adding a layer, I get a cryptic short error message with "PNG???"
or "JPEG???".
My question: is there any way I can access QGIS verbose error logs?
I'd like to understand (and thus fix) what's wrong. I suspect it's our WMS
server that is not behaving correctly, but it does work with several other
software such as OpenLayers, ArcGIS, MapInfo, etc. So far, only QGIS on
MacOS X fails (it appears to work fine on QGIS on Windows) to load WMS
layers from this server (other WMS servers appear to work fine in the MacOS
X version of QGIS).
For those curious to test, here's the WMS server:
http://wms.weatheroffice.gc.ca/geomet/?service=WMS&request=getCapabilities
It's on WeatherOffice, one of the most visited websites in Canada (don't we
all like to know how to dress in the morning ;-) and I'd like to direct
users of our WMS to QGIS in the official documentation, but I first need
QGIS to work fine with our WMS server!
Thanks for any feedback -
Alex - Slashgeo.org
--
Alexandre Leroux, M.Sc., ing.
MSC Data Management Section /
Section de gestion des données du SMC
Canadian Meteorological Centre / Centre météorologique canadien
Environment Canada / Environnement Canada
[email protected] - (514) 421-5024
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