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Thank you Frank, <br>
<br>
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. <br>
<br>
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?<br>
<br>
Thanks,<br>
Derek<br>
<br>
<br>
Frank Warmerdam wrote:
<blockquote cite="mid:49E4F9FF.6080201@pobox.com" type="cite">Derek
Mueller wrote:
<br>
<blockquote type="cite">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.
<br>
<br>
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?
<br>
<br>
gdal_translate.exe "RADARSAT_2_CALIB:SIGMA0:product.xml" out.tif
<br>
gdalwarp -s_srs wgs84.prf -t_srs aeaIS.prf -r bilinear out.tif
image.tif
<br>
</blockquote>
<br>
Derek,
<br>
<br>
gdal_translate "RADARSAT_2_CALIB:SIGMA0:product.xml" -ot Float32
out.tif
<br>
<br>
should be sufficient to discard the imaginary portion. I'm not aware
of any
<br>
easy way of taking the magnitude of the data which is also often
desirable.
<br>
<br>
Best regards,
<br>
</blockquote>
<br>
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<p class="MsoNormal"><b>Derek Mueller<br>
</b><span style="font-size: 10pt;">Roberta <span class="SpellE">Bondar</span>
Fellow
in Northern and Polar Studies<br>
Geography Department, <st1:place w:st="on"><st1:PlaceName w:st="on">Trent</st1:PlaceName>
<st1:PlaceName w:st="on">University</st1:PlaceName></st1:place><br>
<st1:address w:st="on"><st1:Street w:st="on">1600 West Bank Drive</st1:Street>,
<br>
<st1:City w:st="on">Peterborough</st1:City>, <st1:State w:st="on">ON</st1:State>
<st1:PostalCode w:st="on">K9J 7B8</st1:PostalCode></st1:address><br>
Tel: (705) 748-1011, ext. 7153, <br>
Fax: (705) 748-1205<br>
E-mail: <a class="moz-txt-link-abbreviated" href="mailto:dmueller@trentu.ca">dmueller@trentu.ca</a><o:p></o:p></span></p>
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