On Tue, 26 Jul 2022, Matthew Savoie wrote:
Hi all,
I have noticed a difference in the output of gdal_translate between GDAL 3.4.3
and 3.5.1 and I can't see in the changelog that I should see a difference.
This is just a request to see if I missed something or if there might be change
not described in gdal_translate between versions 3.4.3 and 3.5.1.
I have a netcdf4/hdf5 file (test.nc) that I extract a variable and turn into a
geotiff with the gdal_translate command:
`gdal_translate -a_srs EPSG:4326 NETCDF:"./test.nc":analysed_sst
test_nc2tiff.tif`
I have run this command with gdal 3.4.3 and gdal 3.5.1 and get different output
files.
Can you compare the output of the two versions of gdalinfo ?
This should determine whether the difference is when reading or writing.
The difference in the file metadata between the two versions is that using gdal
3.4.3: there is a value for `Origin` and `Pixel Size` and the Corner
Coordinates are in Latitude and longitude. When I use gdal 3.5.1 there are no
metadata
values for Origin or Pixel Size, and the Corner Coordinates look to be in grid
cells.
3.4.3 output:
...
Origin = (-179.995005493240370,89.994997863650838)
Pixel Size = (0.010000000152592,-0.009999999762615)
...
Corner Coordinates:
Upper Left (-179.9950055, 89.9949979) (179d59'42.02"W, 89d59'41.99"N)
Lower Left (-179.9950055, -89.9949979) (179d59'42.02"W, 89d59'41.99"S)
Upper Right ( 180.0050000, 89.9949979) (180d 0'18.00"E, 89d59'41.99"N)
Lower Right ( 180.0050000, -89.9949979) (180d 0'18.00"E, 89d59'41.99"S)
Center ( 0.0049973, 0.0000000) ( 0d 0'17.99"E, 0d 0' 0.01"N)
...
3.5.1 output:
...
Corner Coordinates:
Upper Left ( 0.0, 0.0)
Lower Left ( 0.0,17999.0)
Upper Right (36000.0, 0.0)
Lower Right (36000.0,17999.0)
Center (18000.0, 8999.5)
...
I'm wondering if this is a bug or a feature. I'm happy to provide a sample
file or admit my ignorance if I should have known this was a new change.
Thanks,
Matt Savoie
--
Andrew C. Aitchison Kendal, UK
and...@aitchison.me.uk
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