location == TUFLOW FV Control File (.fvc)

command == Read GIS Z Line

description == Used to update topography within a model. Point and line objects are permitted. Polylines are treated as breaklines in the model’s topography (with the breakline height or elevation varying along its length).

wiki link == https://fvwiki.tuflow.com/Advanced_GIS_Updates

manual link == https://docs.tuflow.com/fv/manual/2026.0/HD2D-Bath-2.html#HD2D-Bath-SB-BL-4