Bruce, I think the 10x10 request is being made by GDAL's WCS driver in order to establish some details about the underlying WCS and it defaults to the whole extents. It sucks fairly badly that such a request can't be done. It might be possible to dummy in the information in the .wcs config file to avoid having to do that query. Investigating.
Best regards, Frank On Fri, Jan 18, 2013 at 4:11 PM, Bruce, Bob (CON) <[email protected]> wrote: > 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 >>> ******************************************************************************************************************* >>> >>> >>> _______________________________________________ >>> Qgis-developer mailing list >>> [email protected] >>> http://lists.osgeo.org/mailman/listinfo/qgis-developer > _______________________________________________ > Qgis-developer mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-developer -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, [email protected] light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | Geospatial Software Developer _______________________________________________ Qgis-developer mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-developer
