[record SMFBV1Header
  ([field schema                   SMFBV1SchemaID]
   [field vertex_count             [integer unsigned 64]]
   [field triangle_count           [integer unsigned 64]]
   [field triangle_index_size_bits [integer unsigned 32]]
   [field coordinate_system        SMFBV1CoordinateSystems]
   [padding-octets 2]
   [padding-octets 4]
   [field meta_count               [integer unsigned 32]]
   [field attribute_count          [integer unsigned 64]])]

