| 摘要 |
Uncoded geographical image data for a pre-defined geographical region is stored in a server unit and at least one wireless communication interface is provided between the server unit and at least one navigation receiver module. At least one position information message is transmitted from the navigation receiver module to the server unit and an expectancy range is selected in the server unit according to the transmitted position information from the pre-defined geographical region. Uncoded geoimage data reproducing the expectancy range is determined and the first uncoded geoimage data is encoded in the server unit. The encoded geoimage data is then transferred to the navigation receiver module from the server unit via the wireless communication interface.
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