[out:json][timeout:250];
//gather results
(

  (node["place"="city"](47.8,5.6,50.6,11.2);)->.a1;
  (node["place"="ocean"](0,-180,90,0);)->.a2;



  foreach.a1(

    convert node ::=::, ::id = id(), tileId = 0;
    out;
  );

  foreach.a2(

    convert node ::=::, ::id = id(), tileId = 1;
    out;
  );



   );

convert node ::=::, ::id = id(), ::geometry = geometry(), tileId = 0;
out;