Hello I got a reply to my message stating that " GDAL ignores a flag in the GEOTIF specification that says whether the coordinates are for the center or the lower-left of each pixel. " Is this true? It's exacly what I am obtaining and what Markus Neteler explained me (about the useage of NN method)
Can anyone confirm me? Thanks Luisa 2011/3/25 Luisa Peña <luisapena1...@gmail.com> > Back again on this > > I have talked with Markus Neteler and he told me that if I use gdalwarp > with NN method, I will get a pixel shift and he suggested me to use > bilinear method. The problem with bilinear is that my pixel values are > changed (based on bilinear method) > So is there any method to keep the pixels values and without any pixel > position shift? > Thanks > > Best regards, > Luisa > > > 2011/3/23 Luisa Peña <luisapena1...@gmail.com> > >> For now GDAL15 (the one that comes with winGRASS GIS) and GDAL16 binary. >> Why? >> (I have sent this to the wrong mailing list) >> >> >>> Why? >>> >>> >>> >>> 2011/3/22 Kyle Shannon <ksshan...@gmail.com> >>> >>>> What version of gdal are you using? >>>> >>>> # ============================ >>>> Kyle Shannon >>>> Physical Science Technician >>>> RMRS Fire Sciences Lab >>>> Fire, Fuels & Smoke - RWU 4405 >>>> 5775 Highway 10 W. >>>> Missoula, MT 59808 >>>> (406)829-6954 >>>> kshan...@fs.fed.us >>>> # ============================ >>>> >>>> >>>> On Tue, Mar 22, 2011 at 15:36, Luisa Peña <luisapena1...@gmail.com>wrote: >>>> >>>>> Greetings >>>>> >>>>> I have sent an message a couple of days ago ( >>>>> http://lists.osgeo.org/pipermail/gdal-dev/2011-March/028124.html) >>>>> about this >>>>> I used gdalwarp with this formulation >>>>> gdalpwarp -t_srs <EPSG> -tr 30 30 input.tif output.tif >>>>> Well it works fine but It seems to be with a deviation of half pixel on >>>>> Latitude and half pixel on Longitude when compared with a similar >>>>> operation >>>>> in ARCGis >>>>> >>>>> Maybe I'm missing some parameter that might be relevant. Any >>>>> suggestion? >>>>> >>>>> Thanks >>>>> Luisa >>>>> >>>>> _______________________________________________ >>>>> gdal-dev mailing list >>>>> gdal-dev@lists.osgeo.org >>>>> http://lists.osgeo.org/mailman/listinfo/gdal-dev >>>>> >>>> >>>> >>> >> >
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