3

I have an hillshade tiff for which the current band type=Bytemay be problematic.

How to change the band type to type=float ?

4

Try:

gdal_translate -of GTiff -ot Float32 input.tif output.tif

Seems you can choose between several float types: "Byte"/"Int16"/"UInt16"/"UInt32"/"Int32"/"Float32"/"Float64"/"CInt16"/"CInt32"/"CFloat32"/"CFloat64"

1
  • The answer has been edited but was initially correct: the float supported types are Float32/Float64/CFloat32/CFloat64. Mar 12 '19 at 20:31
3

With gdal_calc.py is, for example, --type Float32 (my answer based in your link). The next command worked for me when I used to calculate at-satellite brightness temperature:

gdal_calc.py -A b6.rad.tif --calc "1260.56/log((607.76/A)+1)" --type Float32 --outfile bright_temp.tif

I hope that helps.

4
  • Did you tested it ? --type='Float32' clearly fails for me.
    – Hugolpz
    May 22 '15 at 18:03
  • Of course. The above example was in my system with Ubuntu. In Debian, you can see my answer here: gis.stackexchange.com/questions/147457/…
    – xunilk
    May 22 '15 at 20:16
  • If you have problems with gdal_cal.py the script is here: svn.osgeo.org/gdal/trunk/gdal/swig/python/scripts/gdal_calc.py. I copied it in an older Ubuntu system in /usr/bin and it worked nicely (I know that you use Linux for a recently question).
    – xunilk
    May 22 '15 at 20:28
  • I indeed run on ubuntu. I used srtm tif, gdal hillshade, then gdal_calc with type=Float32, it fails. When --calc=<equation> is more basic, it behave as expected.
    – Hugolpz
    May 23 '15 at 7:33

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