Radim,
I have been looking at this again with two people from Cubewerx and we
find that QGIS is issuing this request:
http://nis.cubewerx.com/cubewerx/cubeserv.cgi?CONFIG=OIM_Ortho_Refresh_2010&DATASTORE=OIM_Ortho_Refresh_2010_store&&SERVICE=WCS&VERSION=1.0.0&REQUEST=GetCoverage&FORMAT=GeoTIFF&COVERAGE=image_set&BBOX=315000.2500000000000000,5425000.2500000000000000,779999.7500000000000000,5804999.7500000000000000&CRS=EPSG:26914&RESPONSE_CRS=EPSG:26914&WIDTH=10&HEIGHT=10
while the bounding box that I currently have displayed in QGIS is roughly:
BBOX=632450.0000000000000000,5527900.0000000000000000,634150.0000000000000000,5529000.000000000000
I need to get QGIS to restrict its request to this extent to work. Do you know
how I can do that?
If I issue this request from my web browser:
http://nis.cubewerx.com/cubewerx/cubeserv.cgi?CONFIG=OIM_Ortho_Refresh_2010&DATASTORE=OIM_Ortho_Refresh_2010_store&&SERVICE=WCS&VERSION=1.0.0&REQUEST=GetCoverage&FORMAT=GeoTIFF&COVERAGE=image_set&BBOX=632450.0000000000000000,5527900.0000000000000000,634150.0000000000000000,5529000.000000000000&CRS=EPSG:26914&RESPONSE_CRS=EPSG:26914&WIDTH=1700&HEIGHT=1100
I actually get a tiff image that I can view that looks good and is similar to
what I would expect to see in QGIS. Now I need to get QGIS to actually issue
that request.
Thanks,
Bob Bruce
-----Original Message-----
From: Radim Blazek [mailto:[email protected]]
Sent: January-18-13 3:36 AM
To: Bruce, Bob (CON)
Cc: Qgis-Developer; [email protected]
Subject: Re: [Qgis-developer] Error connecting QGIS 1.9.0 to Ortho Refresh WCS
Hi again,
On Fri, Jan 18, 2013 at 10:28 AM, Radim Blazek <[email protected]> wrote:
> I don't see the same problem here. GetCapabilities and
> DescribeCoverage are not mixed together here. Could it be that you
> accidentally used GetCapabilities request URL as "URL" parameter in
> connection details dialog and it was logged on server but that is
> another issue?
>
> I have got another error however. DescribeCoverage is successfully
> received and parsed, then QGIS sends test GetCoverage request (10x10
> raster to get more info):
>
> http://nis.cubewerx.com/cubewerx/cubeserv.cgi?CONFIG=OIM_Ortho_Refresh_2010&DATASTORE=OIM_Ortho_Refresh_2010_store&&SERVICE=WCS&VERSION=1.0.0&REQUEST=GetCoverage&FORMAT=GeoTIFF&COVERAGE=image_set&BBOX=-101.9598305476503981,48.7910076027865429,-94.6376374194891667,52.5230584889113814&CRS=EPSG:4326&RESPONSE_CRS=EPSG:4326&WIDTH=10&HEIGHT=10
>
> and it fails on server side with:
>
> "Gateway Time-out
> The gateway did not receive a timely response from the upstream server
> or application."
>
> Because the request covers the whole extent, it could be that the
> raster is quite large and there are no overviews/pyramids ready on
> server, it starts to do resampling of the whole extent but it takes to
> much time?
It really seems to be the problem, I have tried with smaller extent
and server sent a correct TIFF in response. In any case it takes very
long time.
Radim
> BTW, you can find some interesting info in QGIS Settings > Panels >
> Log Messages - WCS tab or in debug messages. In log messages are
> usually printed requests which failed and in debug messages are
> printed all requests.
>
> Radim
>
> On Thu, Jan 17, 2013 at 11:07 PM, Bruce, Bob (CON) <[email protected]>
> wrote:
>> I am having trouble using the WCS capability in version 1.9.0 code revision
>> f210668
>> Here are the full details of the QGIS version from the Help listing:
>>
>> QGIS version 1.9.0-Master QGIS code revision
>> f210668
>> Compiled against Qt 4.7.1 Running against Qt
>> 4.7.1
>> Compiled against GDAL/OGR 1.9.2 Running against
>> GDAL/OGR 1.9.2
>> GEOS Version 3.3.5 PostgreSQL Client
>> Version 8.3.10
>> SpatiaLite Version 3.0.1 QWT Version
>> 5.2.1
>> PROJ.4 Version 480 QScintilla2 Version
>> 2.6.2
>> This copy of QGIS writes debugging output.
>>
>> The URL that I am connecting to is:
>> http://nis.cubewerx.com/cubewerx/cubeserv.cgi?CONFIG=OIM_Ortho_Refresh_2010&DATASTORE=OIM_Ortho_Refresh_2010_store
>> The URL of the GetCapabilities request is:
>> http://nis.cubewerx.com/cubewerx/cubeserv.cgi?CONFIG=OIM_Ortho_Refresh_2010&VERSION=1.0.0&SERVICE=WCS&DATASTORE=OIM_Ortho_Refresh_2010_store&REQUEST=GetCapabilities
>>
>> According to Cubewerx, who is our imagery OGC WCS service provider, their
>> log shows both the GetCapabilities and GetCoverage requests present in the
>> same HTTP request while they should be done separately.
>>
>> This is the request that they are finding in their server log:
>> 2012-11-15 19:06:00.980 10527 received HTTP GET request from
>> 205.200.189.2 to URL
>> "http://nis.cubewerx.com/cubewerx/cubeserv.cgi?CONFIG=OIM_Ortho_Refresh_2010&DATASTORE=OIM_Ortho_Refresh_2010_store&service=wcs&version=1.1.1&REQUEST=DescribeCoverage&COVERAGE=OIM_Ortho_Refresh_2010_store&SERVICE=WCS&REQUEST=GetCapabilities&AcceptVersions=1.1.0,1.0.0";
>>
>> Is there a fix to this problem available in a later version of QGIS?
>>
>> Here is the error report that I am seeing in QGIS when I try and add this
>> data source to the project:
>> WCS provider: Cannot calculate extent
>> (d:\src\qgis\src\providers\wcs\qgswcsprovider.cpp : 188 :
>> QgsWcsProvider::QgsWcsProvider)
>> Raster layer: Provider is not valid (provider: wcs, URI:
>> cache=AlwaysCache&crs=EPSG:26914&format=GeoTIFF&identifier=image_set&url=http://nis.cubewerx.com/cubewerx/cubeserv.cgi?CONFIG%
>> 3DOIM_Ortho_Refresh_2010%26DATASTORE%3DOIM_Ortho_Refresh_2010_store
>> (d:\src\qgis\src\core\raster\qgsrasterlayer.cpp : 1609 :
>> QgsRasterLayer::setDataProvider)
>>
>> Thanks,
>> Bob Bruce
>>
>> From: ekeighan [mailto:[email protected]]
>> Sent: January-17-13 3:33 PM
>> To: Bruce, Bob (CON)
>> Subject: Re: Error connecting QGIS 1.9.0 to Ortho Refresh WCS
>>
>> Bob,
>>
>> FYI...
>>
>> [email protected] wrote:
>>
>> *Raster layer:* Provider is not valid (provider: wcs, URI:
>> cache=AlwaysCache&crs=EPSG:26914&format=GeoTIFF&identifier=image_set&url=http://nis.cubewerx.com/cubewerx/cubeserv.cgi?CONFIG%3DOIM_Ortho_Refresh_2010%26DATASTORE%3DOIM_Ortho_Refresh_2010_store
>> (d:\src\qgis\src\core\raster\qgsrasterlayer.cpp : 1609 :
>> QgsRasterLayer::setDataProvider)
>>
>> Is there something at your end that could be changed to allow this to
>> calculate the extent?
>> Looking through the server log, we see only the following related request
>> present twice:
>>
>> 2012-11-15 19:06:00.980 10527 received HTTP GET request from 205.200.189.2
>> to URL
>> "http://nis.cubewerx.com/cubewerx/cubeserv.cgi?CONFIG=OIM_Ortho_Refresh_2010&DATASTORE=OIM_Ortho_Refresh_2010_store&service=wcs&version=1.1.1&REQUEST=DescribeCoverage&COVERAGE=OIM_Ortho_Refresh_2010_store&SERVICE=WCS&REQUEST=GetCapabilities&AcceptVersions=1.1.0,1.0.0";
>>
>> ---------------------------------------------------------------
>>
>> This doesn't make any sense, since it contains two different REQUEST
>> arguments, one for DescribeCoverage and another for GetCapabilities.
>> The Qgs error suggests that the base URL it's using is:
>>
>> http://nis.cubewerx.com/cubewerx/cubeserv.cgi?CONFIG%3DOIM_Ortho_Refresh_2010%26DATASTORE%3DOIM_Ortho_Refresh_2010_store
>>
>> but it almost seems as though it was entered improperly as:
>>
>> http://nis.cubewerx.com/cubewerx/cubeserv.cgi?CONFIG=OIM_Ortho_Refresh_2010&DATASTORE=OIM_Ortho_Refresh_2010_store&service=wcs&version=1.1.1&REQUEST=DescribeCoverage&COVERAGE=OIM_Ortho_Refresh_2010_store
>>
>> The WCS request received from the client produces an error return, since
>> the server has problems parsing the broken request:
>>
>> <ExceptionReport version="1.1.0" xml:lang="en"
>> xsi:schemaLocation="http://www.opengis.net/ows/1.1
>> http://schemas.cubewerx.com/schemas/ows/1.1.0/owsExceptionReport.xsd";>
>> <Exception exceptionCode="MissingParameterValue" locator="identifiers">
>> <ExceptionText>CubeSERV: Cannot execute WCS request, raised in
>> Wcs_Execute() in file "wcs.c" line 162</ExceptionText>
>> <ExceptionText>CubeSERV: Missing parameter "identifiers", raised in
>> throwMissingParamError() in file "cw_cgiparams.c" line 797</ExceptionText>
>> </Exception>
>> </ExceptionReport>
>>
>> The first request from the client should be just a proper GetCapabilities
>> request:
>>
>> http://nis.cubewerx.com/cubewerx/cubeserv.cgi?CONFIG=OIM_Ortho_Refresh_2010&DATASTORE=OIM_Ortho_Refresh_2010_store&SERVICE=WCS&REQUEST=GetCapabilities&AcceptVersions=1.1.0,1.0.0
>>
>> which returns the expected data.
>> -------------------------------------------------
>>
>> Regards,
>>
>> Edric
>>
>> On 17/01/2013 3:35 PM, Bruce, Bob (CON) wrote:
>> Edric,
>> I took another look at connecting QGIS to your WCS, using a
>> newer beta test version. It provided a mechanism to connect to the WCS and
>> it allowed me to try and add it to my map. When I tried to add it I got the
>> following message:
>>
>> WCS provider: Cannot calculate extent
>> (d:\src\qgis\src\providers\wcs\qgswcsprovider.cpp : 188 :
>> QgsWcsProvider::QgsWcsProvider)
>> Raster layer: Provider is not valid (provider: wcs, URI:
>> cache=AlwaysCache&crs=EPSG:26914&format=GeoTIFF&identifier=image_set&url=http://nis.cubewerx.com/cubewerx/cubeserv.cgi?CONFIG%3DOIM_Ortho_Refresh_2010%26DATASTORE%3DOIM_Ortho_Refresh_2010_store
>> (d:\src\qgis\src\core\raster\qgsrasterlayer.cpp : 1609 :
>> QgsRasterLayer::setDataProvider)
>>
>> Is there something at your end that could be changed to allow this to
>> calculate the extent?
>>
>> Thanks,
>> Bob
>>
>> *******************************************************************************************************************
>> ** Bob Bruce, FEC, P.Eng. Geomatics Support Engineer
>> ** [email protected] Geospatial Technology Services Management
>> ** work # (204) 945-6636 GeoManitoba, Manitoba Conservation
>> and Water Stewardship
>> ** FAX # (204) 945-1365 1007 Century Street,
>> ** Winnipeg, Manitoba,
>> Canada, R3H 0W4
>> ** 49-54-31.85N,97-12-16.08W
>> **
>> ** Check out our digital maps at: http://mli2.gov.mb.ca/
>> ** and WMS: http://mlidata.gov.mb.ca/wms/request.aspx
>> *******************************************************************************************************************
>>
>>
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