| 摘要 |
A navigation or mapping system comprises a portable navigation or mapping apparatus (200) that comprises a location determination unit (250, 255, 210) for determining the location of the apparatus (200), and a user input device (220, 240) for receiving input from a user representative of a map feature observed by the user, and a processor (210) operable to identify the observed map feature in dependence on the determined location of the apparatus (200) and to process the user input to obtain user observation data representative of at least one property of the observed map feature.
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