Navigation apparatus

Boots – shoes – and leggings

Patent

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Details

364443, 340990, 340995, G06F16500

Patent

active

054425590

ABSTRACT:
A navigation apparatus is provided with: a measurement unit for measuring a self-position and outputting self-position data; a memory unit for storing map data which includes crossing data and road data; a map-matching unit, for map-matching the self-position data with respect to the road data; and a displaying unit for displaying the map-matched self-position data and the road data on the map data. The map-matching unit is provided with a first crossing searching unit for searching crossing data corresponding to a first crossing connected to a road, to which the self-position data is presently map-matched, and located within a first predetermined distance from the self-position. The first crossing searching unit outputs first candidacy crossing data. The map-matching unit is also provided with a second crossing searching unit for searching crossing data corresponding to a second crossing located within a second predetermined distance from the first crossing. The second crossing searching unit outputs second candidacy crossing data. The map-matching unit is further provided with a map-matching control unit for map-matching the self-position data with respect to the road data corresponding to roads connected to the first and second crossings indicated by the first and second candidacy crossing data.

REFERENCES:
patent: 4763270 (1988-08-01), Itoh et al.
patent: 4782447 (1988-11-01), Ueno et al.
patent: 4926336 (1990-05-01), Yamada
patent: 4937752 (1990-06-01), Nanba et al.
patent: 4937753 (1990-06-01), Yamada
patent: 4943925 (1990-07-01), Moroto et al.
patent: 5067082 (1991-11-01), Nimura et al.

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