Dataset {
    Int32 gid[gid = 31];
    Grid {
     ARRAY:
        Float64 code[gid = 31];
     MAPS:
        Int32 gid[gid = 31];
    } code;
    Grid {
     ARRAY:
        Int16 linkcode[gid = 31];
     MAPS:
        Int32 gid[gid = 31];
    } linkcode;
    Grid {
     ARRAY:
        Int16 mantaghe[gid = 31];
     MAPS:
        Int32 gid[gid = 31];
    } mantaghe;
    Sequence { Sequence { Sequence { Float64 ordinate; Float64 abscissa; } ring; } polygon; } the_geom[gid = 31];
} subbasins;