Are you seeing the issue with both WCS 1.0 and WCS 1.1? I could have sworn I fixed WCS 1.0 back at the 5.0 but perhaps the merge of the WCS 1.1 support broke that. There is code in mapwcs.c to account for the differences in various pixel models (MapServer, WCS 1.0 and WCS 1.1).
Steve >>> On 3/19/2009 at 3:59 PM, in message <9c2015090903191359y4c54cb4dne65f87645d79...@mail.gmail.com>, Roger André <ran...@gmail.com> wrote: > You're right, 1/2 pixel offset is definitely present. What a pain. > Any idea when the 5.4 stable release is expected? I see that a beta > release is available currently. > -- > > On Thu, Mar 19, 2009 at 1:55 PM, Roger André <ran...@gmail.com> wrote: >> Sure thing. Here are the OUTPUTFORMAT declarations I have: >> >> OUTPUTFORMAT >> NAME "GEOTIFF_FLOAT" >> DRIVER 'GDAL/GTiff' >> MIMETYPE 'image/tiff' >> IMAGEMODE FLOAT32 >> EXTENSION 'tif' >> END >> >> OUTPUTFORMAT >> NAME "ASCII_GRID" >> DRIVER 'GDAL/AAIGrid' >> MIMETYPE 'image/grid' >> IMAGEMODE FLOAT32 >> EXTENSION 'asc' >> END >> >> I'll have to check my output data more closely to see if the 1/2 pixel >> offset exists. I've only looked at it in a cursory way so far. The >> version of MapServer I'm using is 5.2.0 >> -- >> >> On Thu, Mar 19, 2009 at 12:14 PM, Alexander Petkov <green...@gmail.com> wrote: >>> On Thu, Mar 19, 2009 at 12:48 PM, Roger André <ran...@gmail.com> wrote: >>>> 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 >>> >>> Hi Roger: >>> >>> Glad to know that you got the problem solved. Do you mind sharing your >>> OUTPUTFORMAT configurations in your mapfile if you have them >>> configured, particularly for the ASCII grid format. >>> >>> Also, are you using a mapserver release older than any of the 5.4 >>> betas? I am using 5.2.1 and I see the result of the GetCoverage >>> request being offset by a half pixel (the pixel size of my data). Bug >>> reports indicate that this offset will be fixed for the 5.4 release. >>> >>> >>> Thanks in advance, >>> Alex >>> >> > _______________________________________________ > mapserver-users mailing list > mapserver-users@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/mapserver-users _______________________________________________ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
