[gdal-dev] gdal_translate: extracting mask band and its overviews

[Emanuele Tajariol]

Hi,

I'm trying and extract the single mask band out of a geotiff file using 
gdal_translate.
The tiff file also contains overviews of mask band, and I'd like to extract them 
as well (In the end of the mail there's a fragment of the input file's 
gdalinfo.)

The command I'm using is:

gdal_translate -b mask \
   --config GDAL_TIFF_INTERNAL_MASK YES \
   -co COPY_SRC_OVERVIEWS=yes \
   -co TILED=yes  \
   -co COMPRESS=DEFLATE   \
   intput_file.tif output_mask.tif

Anyway the output file does not contain any overview at all.

I get the very same result also removing the GDAL_TIFF_INTERNAL_MASK config 
(which should not be needed anyway since the mask band is exported as a data 
band).

Am I missing any command line option or is it possibile at all?


   Thanks,
   Emanuele


====
Input file gdalinfo fragment:

[...]
Size is 19584, 19584
[...crs, origin, pixel size...]
Metadata:
  AREA_OR_POINT=Area
Image Structure Metadata:
  COMPRESSION=YCbCr JPEG
  INTERLEAVE=PIXEL
  SOURCE_COLOR_SPACE=YCbCr
[...Corner coords...]
Band 1 Block=256x256 Type=Byte, ColorInterp=Red
  Overviews: 9792x9792, 4896x4896, 2448x2448, 1224x1224, 612x612, 306x306
  Mask Flags: PER_DATASET 
  Overviews of mask band: 9792x9792, 4896x4896, 2448x2448, 1224x1224, 612x612, 
306x306
  Metadata:
    COLORINTERP=Red
Band 2 Block=256x256 Type=Byte, ColorInterp=Green
  Overviews: 9792x9792, 4896x4896, 2448x2448, 1224x1224, 612x612, 306x306
  Mask Flags: PER_DATASET 
  Overviews of mask band: 9792x9792, 4896x4896, 2448x2448, 1224x1224, 612x612, 
306x306
  Metadata:
    COLORINTERP=Green
Band 3 Block=256x256 Type=Byte, ColorInterp=Blue
  Overviews: 9792x9792, 4896x4896, 2448x2448, 1224x1224, 612x612, 306x306
  Mask Flags: PER_DATASET 
  Overviews of mask band: 9792x9792, 4896x4896, 2448x2448, 1224x1224, 612x612, 
306x306
  Metadata:
    COLORINTERP=Blue
[end]

====
Output file gdalinfo fragment:

[...]
Size is 19584, 19584
[...crs, origin, pixel size...]
Metadata:
  AREA_OR_POINT=Area
Image Structure Metadata:
  COMPRESSION=DEFLATE
  INTERLEAVE=BAND
[...Corner coords...]
Band 1 Block=256x256 Type=Byte, ColorInterp=Gray
[end]

-- 

Regards,
Emanuele Tajariol
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