Hi Martin, Just add a line like this (adjusted to your case) after the CoverageName line in the .vrt. <GetCoverageExtra>&SERVICE=WCS&VERSION=1.0.0&REQUEST=GetCoverage&FORMAT=GeoTIFF&COVERAGE=layername&BBOX=381464.564874,7282848.63791,7310018.58218,422460.634623&CRS=EPSG:32633&WIDTH=800&HEIGHT=600</GetCoverageExtra>
Likely you do not need all these GetCoverage specifications. However, with the BBOX set to your region you can import the .vrt directly to GRASS with r.in.gdal. (See http://www.gdal.org/frmt_wcs.html or http://wiki.esipfed.org/images/2/2c/BestPractices_WCS.pdf page 24) Cheers Stefan -----Original Message----- From: martin.zbin...@gmail.com [mailto:martin.zbin...@gmail.com] On Behalf Of Martin Zbinden Sent: 4. januar 2014 21:01 To: Blumentrath, Stefan Subject: Re: [GRASS-user] WCS import into GRASS GIS - select region extent only Hey Stefan, Thanks, you helped me already a lot. I'm looking forward to build some python script which does these steps automatically. It seems to me that these .vrt-files can do kind of magic :-) However, one concern is still left. When I choose a too big projwin, then Mapserver gives an error. gdal_translate -co "COMPRESS=LZW" -projwin 2592000 1182500 2597500 1179000 dem_wcs.vrt dem_wcs.tif Computed -srcwin 53295 56717 2750 1750 from projected window. 0ERROR 1: msWCSGetCoverage(): WCS server error. Raster size out of range, width and height of resulting coverage must be no more than MAXSIZE=2048. It seems that r.in.gdal ist conscious about this and downloads data tile by tile. Maybe you can give me a hint me how to do the same with my own script. No way to tell the projwin through the GDAL-VRT directly, so I could load it directly with r.in.gdal? Cheers, Martin -- Martin Zbinden Riedacker 523 3154 Rüschegg Heubach +41 78 628 28 82 2014/1/3 Blumentrath, Stefan <stefan.blumentr...@nina.no>: > Hei Martin, > > You could try making a (temporary) virtual GDAL-VRT dataset (it’s a simple > textfile (XML) containing information like this, in the example below named > "dem_wcs.vrt"): > > <WCS_GDAL> > <ServiceURL>http://your_wcs_server/wcs.dtm?</ServiceURL> > <CoverageName>layername</CoverageName> > </WCS_GDAL> > > For more info on vrt-format see: > http://www.gdal.org/gdal_vrttut.html > > After that you could use gdal_translate > (http://www.gdal.org/gdal_translate.html), which has a projwin parameter > where you can feed you GRASS region boundaries from g.region -up: > gdal_translate -co "COMPRESS=LZW" -projwin ulx uly lrx lry dem_wcs.vrt > dem_wcs.tif > > Hope that helps, > > Cheers > Stefan > > -----Original Message----- > From: grass-user-boun...@lists.osgeo.org > [mailto:grass-user-boun...@lists.osgeo.org] On Behalf Of Martin > Zbinden > Sent: 3. januar 2014 21:46 > To: grass-user@lists.osgeo.org > Subject: [GRASS-user] WCS import into GRASS GIS - select region extent > only > > Hi, > > For my Bachelor-Thesis I want to optimize the erosion risk map of Switzerland > for use in agricultural extension. Although I concentrate on 3 cantons only > (BE, FR, SO), I have to manage huge amounts of data. The fact that the > raster data I got from the federal office are overlapping each other > (following the defined fieldblocks) doesn't make things easier, but I've at > least found r.patch which can combine them one by one. > > I thought, with Mapserver (V 6.4.0) I'd found the perfect solution to all my > problems. Now I'm stuck after 5+ hours of trying to import the data from my > local WCS-Service. I have seen the hints on GRASS Wiki [1] and r.in.gdal > starts to download geotiff-tiles from Mapserver. The problem is, that I don't > want all the 12 GB of data, but only the grass region extent. > > The following http-query does what I expect, it makes me a GeoTIFF-File from > my region defined by BBOX=... . > http://localhost/mywcs?SERVICE=WCS&VERSION=1.0.0&REQUEST=GetCoverage&c > overage=blw.eros_z&FORMAT=image/tiff&CRS=EPSG:2056&BBOX=2596000,118100 > 0,2597500,1182500&RESX=2&RESY=2 > > > I tried to restrict the download to the region by defining a BBOX in this > WCS_GDAL xml file. However, this didn't work and isn't supposed to work [2]. > Is there a way to say r.in.gdal to only get the data from the region extent? > > I know there is this new, very clever r.in.wms2 script, which does exactly > what I want -- for WMS. Is there a way to get WMS-Mapserver to serve RAW-data > (erosion in t per annum, elevation data)? Or maybe better create a python > script to download map by a custom http-request? > > Thanks in advance for any advice! I hope I can get it to work somehow. > Liebe Grüsse > Martin Zbinden > > PS: the WCS server given in GRASS wiki seems to be down this time. > > [1] > http://grasswiki.osgeo.org/wiki/Global_datasets#OGC_WCS_-_Albedo_examp > le [2] > http://lists.osgeo.org/pipermail/gdal-dev/2008-March/016552.html > > > -- > Martin Zbinden > Riedacker 523 > 3154 Rüschegg Heubach > +41 78 628 28 82 > _______________________________________________ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user > _______________________________________________ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user