location == Geometry Control File (.tgc)

command == Read GIS BG Shape

description == Used for 2D flow constrictions to represent additional losses associated with bridges or box culverts. This input includes accounts for flow above and below the bridge obvert (soffit).

wiki link == https://wiki.tuflow.com/TUFLOW_Empty_Files#TUFLOW_Geometry_Control_file_.28TGC.29

manual link == https://docs.tuflow.com/classic-hpc/manual/2026.0/TwoD-Domains-1.html#tab:tab-BridgeShapeAttributeDescriptions