Dataset {
    Float32 Y[Y = 450];
    Float32 S[S = 21];
    Float32 X[X = 500];
    Grid {
     ARRAY:
        Float32 PredErrorVars[S = 21][Y = 450][X = 500];
     MAPS:
        Float32 S[S = 21];
        Float32 Y[Y = 450];
        Float32 X[X = 500];
    } PredErrorVars;
} Forecast;