location == BC Control File (.tbc)

command == Read GIS SA

description == Used to define the location of internal source area flow verse time boundaries.

wiki link == https://wiki.tuflow.com/TUFLOW_Empty_Files#TUFLOW_Boundary_Control_file_.28TBC.29

manual link == https://docs.tuflow.com/classic-hpc/manual/2026.0/Boundaries-InitialConditions-1.html#SA-Option-4