Dataset {
    Int32 gid[gid = 15];
    Byte bassins[gid = 15][20];
    Byte label[gid = 15][20];
    Grid {
     ARRAY:
        Float64 shape_area[gid = 15];
     MAPS:
        Int32 gid[gid = 15];
    } shape_area;
    Grid {
     ARRAY:
        Float64 shape_leng[gid = 15];
     MAPS:
        Int32 gid[gid = 15];
    } shape_leng;
    Sequence { Sequence { Sequence { Float64 ordinate; Float64 abscissa; } ring; } polygon; } the_geom[gid = 15];
    Grid {
     ARRAY:
        Int32 wra[gid = 15];
     MAPS:
        Int32 gid[gid = 15];
    } wra;
} major_watersheds;