Should work for 2D models \n \n \n \nstdin 1D velocity function to be used \nfile mask [required] The water bottom is read from the mask file. \n1 above the WB \n0 bellow the WB \n \nstdout The output velocity model has dimensions of the mask file. \nvel [1.5] velocity to use above the horizon (usually water velocity) \n \n \n \n \n \n\n