Thank you Frank,
I think I should have said, how do I get both the real and imaginary
numbers out as Float32, since ultimately I do want to calculate
magnitude (as you might have guessed). Then I could read the 'real' and
'imaginary' numbers into IDL as 2 separate tiffs do do the calculation.
I tried to import the CFloat32 directly into IDL/ENVI but it doesn't
like the '64-bit pixel'. Could there be a workaround by modifying tiff
tags to say the CFloat32 data are actually 2 separate 32-bit numbers?
Thanks,
Derek
Frank Warmerdam wrote:
Derek Mueller wrote:
I am new to gdal and it looks very promising ...but I am trying to
make a geotiff with four bands from an RSat-2 SLC image but I don't
need or want the imaginary part of the CFloat32 for now.
So far I have been able to extract the data and warp it to my
favourite projection. Can gdal separate the CFloat32 and save the
just real part?
gdal_translate.exe "RADARSAT_2_CALIB:SIGMA0:product.xml" out.tif
gdalwarp -s_srs wgs84.prf -t_srs aeaIS.prf -r bilinear out.tif image.tif
Derek,
gdal_translate "RADARSAT_2_CALIB:SIGMA0:product.xml" -ot Float32 out.tif
should be sufficient to discard the imaginary portion. I'm not aware
of any
easy way of taking the magnitude of the data which is also often
desirable.
Best regards,
--
*Derek Mueller
*Roberta Bondar Fellow in Northern and Polar Studies
Geography Department, Trent University
1600 West Bank Drive,
Peterborough, ON K9J 7B8
Tel: (705) 748-1011, ext. 7153,
Fax: (705) 748-1205
E-mail: [email protected]
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