Dataset {
    Float32 Y[Y = 180];
    Float32 Z[Z = 33];
    Float32 X[X = 360];
    Grid {
     ARRAY:
        Int32 basin[Z = 33][Y = 180][X = 360];
     MAPS:
        Float32 Z[Z = 33];
        Float32 Y[Y = 180];
        Float32 X[X = 360];
    } basin;
    Grid {
     ARRAY:
        Int32 landsea[Y = 180][X = 360];
     MAPS:
        Float32 Y[Y = 180];
        Float32 X[X = 360];
    } landsea;
} Masks;