It is not really something that can be converted to an overlay (gifti or otherwise). It is a probabalistic atlas with prior probabilities for each label as well as curvature mean and stddev for each label at each point in space. If you know some C++, you can look at GCSAread() in gcsa.cpp to see what gets read in.

On 3/13/2024 7:00 AM, Oscar Esteban wrote:

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Dear all,

I'm trying to understand the GCS file format as I failed to try an easy conversion with mris_convert.

If mris_convert cannot convert GCS to GIFTI, is there any open description of how the format is implemented?

Thanks very much

Best,

Oscar

___________________________
Oscar Esteban, Ph.D.

Research and Teaching Ambizione FNS Fellow

Dept. of Radiology, CHUV, University of Lausanne

+41 77 957 00 77

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