Dataset {
    Float32 lat[lat = 10801];
    Float32 lon[lon = 21601];
    Grid {
     ARRAY:
        Int16 z_bedrock[lat = 10801][lon = 21601];
     MAPS:
        Float32 lat[lat = 10801];
        Float32 lon[lon = 21601];
    } z_bedrock;
    Grid {
     ARRAY:
        Int16 z_ice[lat = 10801][lon = 21601];
     MAPS:
        Float32 lat[lat = 10801];
        Float32 lon[lon = 21601];
    } z_ice;
} ETOPO1;