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definition strict definition

Ruhrsite-ID

The official identification number used by municipalities in the Ruhr region of Germany.

The Ruhrsite-ID is the official building identification number assigned by municipalities in Germany's Ruhrgebiet, a large urban concentration in the state of Nordrhein-Westfalen.

The Ruhr is not one city but a belt of neighboring ones, so the number comes from the municipality that holds the building rather than from a single regional authority.

Its scope is that region alone. A building elsewhere in Nordrhein-Westfalen or in Germany has none, and the German building number is the field that covers the whole country.