def maketopo_flat():
    """
    Output topography file for the entire domain
    """
    nxpoints = 201
    nypoints = 301
    xlower = 204.812
    xupper = 205.012
    ylower = 19.7
    yupper = 20.0
    outfile= "flat.tt2"     
    topotools.topo2writer(outfile,topo_flat,xlower,xupper,ylower,yupper,nxpoints,nypoints)