grain mask to grain polygon
grain mask to grain polygon

USGSDenverPychron/pychron,NMGRL/pychron,UManPychron/pychron,NMGRL/pychron,NMGRL/pychron,NMGRL/pychron,UManPychron/pychron,USGSDenverPychron/pychron,UManPychron/pychron,USGSDenverPychron/pychron,USGSDenverPychron/pychron,UManPychron/pychron