Attributes {
    Y {
        String standard_name "latitude";
        Int32 gridtype 0;
        String units "degree_north";
    }
    X {
        String standard_name "longitude";
        Int32 gridtype 0;
        String units "degree_east";
    }
    alt {
        String long_name "Altitude";
        Float32 missing_value NaN;
        Float32 file_missing_value -3.39999995E38;
        String units "decimeters";
    }
    String Conventions "IRIDL";
}