Random district shown on postal_code search

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1

When I do a zipcode search like: https://nominatim.openstreetmap.org/ui/search.html?country=be&postalcode=9700, I get the label: “9700, Ename, Oudenaarde, East Flanders, Belgium”. The map shows the correct expected outline (Oudenaarde), but the label mentions Ename, which is only 1 of several districts in the town Oudenaarde, all of which have zipcode 9700. So it would make more sense if Ename is not mentioned at all.

I believe the reason Ename is mentioned because it is where the centroid is located. If I compare to some other towns in Flanders where this issue arises.

2

The label that comes with the postcode is more or less determined by reverse geocoding at the position where the postcode is mapped/computed. The levels which are included in the result (neighborhood, suburb, town, etc) are currently more or less based on a one-size-fits-globally approach. Or to put it the other way around: Nominatim currently doesn’t know that suburbs should not be included in the label for a Belgian postcode.

Having a better country-specific treatment is planned but not yet implemented.