Queries to get test data.
Have a look at https://overpass-turbo.eu/ to test the queries.
area[name="Troisdorf"];
out;
(rel["ref"="A 555"];);
out center;
(rel["ref"="A 555"];);
out geom;
(way(225576797);>;);
out meta center;
(way(225576797););
out center;
- With empty center information to test exception, this should never happen