Search notes:

Overpass API: map_to_area

The map_to_area maps OSM relation IDs to their corresponding (pseudo) area id, i. e. the function adds 3600000000 to the id. 
relation[name=Pfungen];
map_to_area;
out;
As per a note found in this documentation, the main purpose of map_to_area is to search for objects inside an area, which is again inside another area ("area in area query").

See also

area
Overpass API: statements

Index

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