[gdal-dev] Improving NITF SICD support

[Andrew Hardin]

Hi all,

I'd like to improve derived dataset support for SICD files. Here's one of
the example files I'm working with:

https://six-library.s3.amazonaws.com/sicd_example_1_PFA_RE32F_IM32F_HH.nitf

This SICD file is a two-band NITF with an XML DES tacked onto the end. The
two bands are {inphase, quadrature} and together they represent complex
data. However, because they're in two separate bands, gdalinfo doesn't
report any of the standard DERIVED_SUBDATASET functions for the complex
data.

The desired end-state is to have standard DERIVED_SUBDATASET functions
available for two-band complex data NITFs.  One implementation option(?)
would be to write a new driver for SICD that's a specialized wrapper around
a NITF dataset, but that feels heavy handed.

Any suggestions for how to go about this?

Thanks,
Andrew
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