Sorry for the spam, I think I found the answer. Both RESX and RESY need to be positive values. Using that, I am able to get back data that matches the original data.
Thanks, Roger -- On Thu, Mar 19, 2009 at 11:36 AM, Roger André <ran...@gmail.com> wrote: > Hi Alexander, > > Thanks for the response. Yes, I am using a GetCoverage request that > looks like this: > > http://localhost/cgi-bin/mapserv?map=/var/www/mapfiles/netCDF/netcdf.map > &SERVICE=wcs > &VERSION=1.0.0 > &REQUEST=GetCoverage > &COVERAGE=elev > &CRS=EPSG:4326 > &BBOX=125,50,130,55 > &WIDTH=600 > &HEIGHT=600 > &FORMAT=image/grid > > The source is a single-band image, and the data is correctly returned > as either a single-band GeoTIFF, or an ASCII Grid, depending on which > FORMAT I specify in the WCS string. > > What I would like to do is eliminate the WIDTH and HEIGHT parameters > from the request, and just return whatever is available in the BBOX > area. When I remove them from the request, I get an error that says I > either need HEIGHT and WIDTH, or RESX and RESY. When I restructure > the command to include RESX and RESY (see below), I get an "Out of > memory" error. > > http://localhost/cgi-bin/mapserv?map=/var/www/mapfiles/netCDF/netcdf.map > &SERVICE=wcs > &VERSION=1.0.0 > &REQUEST=GetCoverage > &COVERAGE=elev > &CRS=EPSG:4326 > &BBOX=125,50,130,55 > &FORMAT=image/grid > &RESX=.033&RESY=-.033 > > I believe I should be able to use the pixel dimensions that are > reported back to me in a DescribeCoverage request, which show them to > be: > > <gml:offsetVector>0.033333333333333 0</gml:offsetVector> > <gml:offsetVector>0 -0.033333333333333</gml:offsetVector> > > Thanks for the help, > > Roger > -- > > On Wed, Mar 18, 2009 at 6:51 PM, Alexander Petkov <green...@gmail.com> wrote: >> On 3/18/09, Roger André <ran...@gmail.com> wrote: >>> Hi All, >>> >>> I have a question which I'm not sure relates to the structure of a WCS >>> request, or the setup of my WCS server. I have a tileset of SRTM >>> tiles that I would like to query by geographic region via WCS. I have >>> basic functionality working, but I can't figure out how to make a >>> request via BBOX that only returns the actual pixels that are present >>> in the source data. Is this possible? I would think that as long as >>> I specified the matching SRS, I should be able to, but I've gotten >>> stuck. >> >> Are you using a WCS getcoverage request to get the data? Is the source >> file a 1 band image? Is the returned data contaiining 3 bands? A >> little more information will be of help to give a good answer. >> >> You are working in the right direction by configuring your WCS to >> serve the actual data. >> >> In my case, I have 1 band palletted images, and with a getcoverage >> request for a bounding box I got the values, but as a grayscale >> image. With some help from another user I managed to add the colormap >> info from the class directives in my map file. >> >> The following output format is what worked to add a pallette to the >> returned image: >> OUTPUTFORMAT >> NAME "GTIFF" >> MIMETYPE "image/tiff" >> DRIVER "GDAL/GTiff" >> EXTENSION "tif" >> IMAGEMODE "PC256" >> TRANSPARENT TRUE >> FORMATOPTION "COMPRESS=DEFLATE" >> FORMATOPTION "ZLEVEL=9" >> END >> > _______________________________________________ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
