Unit Segment Length for olivine EBSD single grain analysis

Unit Segment Length (USL) for olivine single grain analysis by EBSD technique. The script will reconstruct inner grain boundary (subdomain boundary) and outer boundary (grain boundary) and show subdomains with different orientation. It will measure the total length of the inner boundary and USL (total length of subdomain boundary over size of measured grain), distribution of misorientation angle, and the relationship of tilted VS twisted wall. We provide an olivine EBSD data from NWA 2221 which is an ultramafic meteorite.