HeteroData(
  data={
    x=[40320, 2],  # coordinates in radians (lat in [-pi/2, pi/2], lon in [0, 2pi])
    node_type='AnemoiDatasetNodes',
    area_weight=[40320, 1],
  },
  hidden={
    x=[10242, 2],  # coordinates in radians (lat in [-pi/2, pi/2], lon in [0, 2pi])
    node_type='TriNodes',
    area_weight=[10242, 1],
  },
  (data, to, hidden)={
    edge_index=[2, 62980],
    edge_type='CutOffEdges',
    edge_length=[62980, 1],
    edge_dirs=[62980, 2],
  },
  (hidden, to, hidden)={
    edge_index=[2, 81900],
    edge_type='MultiScaleEdges',
    edge_length=[81900, 1],
    edge_dirs=[81900, 2],
  },
  (hidden, to, data)={
    edge_index=[2, 120960],
    edge_type='KNNEdges',
    edge_length=[120960, 1],
    edge_dirs=[120960, 2],
  }
)
