Navigation device and method
A navigation device and current location technology, applied to road network navigators and other directions, can solve the problem that the navigation device cannot provide and guide users
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no. 1 approach
[0044] Refer below Figure 4 The first embodiment of the present invention will be described.
[0045] Figure 4 It is a schematic diagram explaining the search process of a more optimal destination used by the navigation device of the first embodiment. In this embodiment, after the user sets a known POI as destination A through the steps shown in the screens of Figs. 3(b) to 3(g), the navigation device retrieves the location from the current location to the destination A. Suppose the recommended route between destinations is displayed on the navigation screen (left side of Figure 3(h)). When the "better destination search" button is clicked on the screen of FIG. 3(h), the judgment unit 13 is as Figure 4 As shown, a circular area with the current position O of the own vehicle as the center and the linear distance from the current position O to the destination A as the radius R is used as the search range, and within the circular area, it is determined whether there is a A repla...
no. 2 approach
[0050] In the first embodiment, a circular area is used as the search range. But not limited to this, you can also Figure 5 The quadrilateral area shown is the search range.
[0051] Figure 5 It is a schematic diagram for explaining the operation when searching for a better destination in the second embodiment. When the user clicks the "better destination search" button in FIG. 3(h), the judgment unit 13 is as Figure 5 As shown, the connection L between the current position O and the set destination A is the center, and the connection L is expanded outward by the prescribed angle ranges r1, r2, r3, and r4 to determine a quadrilateral area, and Let this quadrilateral area be the search range. Among them, the angles r1 to r4 are all 45 degrees or less, preferably 30 degrees or less, and the angles r1, r2, r3, and r4 may be different from each other, or any of them may be the same. In particular, in r1, r2, r3, and When r4 is the same, the determined quadrilateral area is a rho...
no. 3 approach
[0057] In another embodiment of the present invention, the search range may be set along the path from the current position to the set destination A.
[0058] Image 6 It is a schematic diagram for explaining the operation when searching for a better destination in the third embodiment. When the user clicks the "better destination search" button in FIG. 3(h), the judgment unit 13 is as Image 6 As shown, in the area of a predetermined width on both sides of the path L from the current position O of the vehicle to the set destination A that has been retrieved by the path search unit 15, it is determined whether there is the same type as the destination A. Instead of POI. The prescribed width may be 500 meters or less, and preferably 300 meters or less. When it is determined that there is a substitute POI, the presentation unit 14 displays the substitute POI as a candidate POI on the display unit 16. If multiple destination A is retrieved (in Image 6 In the case of two alterna...
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