ziad Wrote:
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> There are no tools to do this at the moment.
> However one way to do this is to consider a
> standard mesh with a low number of subdivisions.
> For instance, if you want about 4000 nodes over
> the whole hemisphere, you can create standard
> meshes with ld20 and then use the nodes from the
> low res mesh to place the seeds on the high-res
> surface mesh.

In addition to Ziad's useful comments:
- if you use ldL and ldH for low- and high-res surfaces, the mapping from L to H becomes very easy if H is a multiple of L as the coordinates in L have an almost perfect match to a subset of the coordinates of H.
- in the PyMVPA developer version (github.com/PyMVPA/PyMVPA) there is support to compute such a mapping in Python:

from mvpa2.suite import *
surf_low=surf.from_any('ico16.asc')
surf_high=surf.from_any('ico64.asc')
low2high=surf_low.map_to_high_resolution_surf(surf_high)

for node_low, node_high in low2high.iteritems():
print "%s -> %s" % (node_low, node_high)