vtkEarthSourceで海岸線付きの球が描ける.SetOnRatioの既定は10で1が一番細かい.日本の形状は少しまともになるが,北海道,四国,九州が出てこない…

package require vtk

vtkEarthSource earth
    earth SetOnRatio 1

vtkPolyDataWriter writer
    writer SetInput [earth GetOutput]
    writer SetFileName earth.vtk
    writer Write

writer Delete
earth Delete