| 摘要 |
A navigation system includes a display for displaying map sections and point of interest (POI) data to a user and a database for storing POI data. A retrieval unit is provided to retrieve from the database POI data for the map section to be displayed. The POI database includes POIs and substitute POIs representing a number of POIs in a map region. It may then depend on the map scale with which the map section is to be displayed whether a substitute POI or a POI which it represents is retrieved from the database.
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