Hi,
Before filling a ticket I would like to ask here if this gdalwarp
behavior is the intended one.
When I convert a grid from geogs to UTM the nodatavalues are filled with
zeros.
I get the expected behaviour if I use the -dstnodata with a numeric
value, but I found no way tom tell it use NaN.
Summary
This puts zeros on the nodata zone, but I don't find it correct as "0"
is not exactly a natural nodata value. For my habits NaN is the natural
no data value.
gdalwarp -s_srs "+proj=latlong" -t_srs "+proj=utm +zone=29 +datum=WGS84"
swath_grid.grd lixo_utm.tiff
Furthermore when I load the " lixo_utm.tiff" in Mirone is does not
recognize a nodata value, whilst if I do this instead
gdalwarp -s_srs "+proj=latlong" -t_srs "+proj=utm +zone=29 +datum=WGS84"
-dstnodata 1 swath_grid.grd lixo_utm.tiff
than "1" is recognized as the nodata. I have not investigated the
metadata to see why the "0" is not set to represent the nodata.
Thanks
Joaquim Luis
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