Hi Foteini

if you threshold the surface map, the index of each nonzero value can be used to lookup the vertex coordinate in the relevant surface (e.g. white or pial) in matlab for example. What do you want to do with this information?

cheers Bruce

On Thu, 10 Nov 2016, Foteini Protopapa wrote:

Dear FS experts, I have a volume with specific clusters and I project it to a surface using mri_vol2surf. How can I determine the edges of my clusters now? By getting the surface I get a vector, but I don't know the "labels" of this vector. To which point (in mm) each value corresponds?

Thanks in advance, Foteini.