Hi Donna,
Thanks for the nice comment.
I would just like to note that in AFNI, the prefered method
for analyzing data on the surface is to use .niml.dset files,
which can be read and written just like any other AFNI datasets.
Those files can be created via the vol2surf program or interface,
just like the old .1D files (-out_niml MY_DSET.niml.dset).
- rick