Navigation device, and method for retrieving alternative facility by navigation device

Abstract

The invention discloses a navigation device which can display destination facilities and facilities comprised in upper layer facility types of destination facility types to ensure that a user can change set destination facilities according to the condition. The navigation device comprises a current position detection part, a storage part, an operation part, a facility retrieval part, a display part, a destination facility type determination part and an upper facility type judgment part; the storage part stores map data; the operation part inputs the destination facilities; the facility retrieval part retrieves the destination facilities; the destination facility type determination part determines the facility types of the destination facilities when the operation part inputs the destination facilities; the upper facility type judgment part judges whether the upper layer facility types of the facility types, which are determined by the destination facility type determination part, are comprised; and under the condition of determining that the upper layer facility types are comprised, the facility retrieval part retrieves the destination facilities and upper layer replacement facilities which are comprised in the facility types of the upper layer and are a specified distance far away from the destination facilities, and the retrieved facilities are displayed on the display part.

Description

technical field [0001] The present invention relates to a navigation device and its replacement facility retrieval method, in particular to a navigation device capable of retrieving and displaying alternative destination facilities different from a set destination and its replacement facility retrieval method. Background technique [0002] In the database of prior art navigation devices, such as Figure 10 As shown, facilities of each facility type are generally stored in category, major category, medium category, and small category. It can be seen from the figure that according to the order of categories, major categories, medium categories, and small categories, the scope of each category is getting smaller and smaller, and the content is becoming more and more specific, such as "Zhongshan District Police Station" and "Xigang District Police Station "belongs to the same facility type "police station", which belongs to the facility category of the small category. The facili...

AI Technical Summary

Problems solved by technology

[0006] However, when the user inputs a specific facility name in the navigation device, for example, he wants to go to "A Dumpling Shop" to have a meal while driving, and when he inputs "A Dumpling Shop" in the navigation device, the "A Dumpling Shop" is found through the display of the navigation device. When the "Dumpling Shop" is far away from the current location and you want to go to the nearby "Chinese Restaurant", since the "Chinese Restaurant" belongs to the specific facilities included in the upper class facility category "Chinese Cuisine" of "A Dumpling Shop", so In the navigation device of the prior art as described above, when the user only inputs "A Dumpling Shop", the user cannot be presented with options included in the facility categories belonging to the upper class of "A Dumpling Shop" at the same time. Specific facilities, therefore, the user has to re-enter "China Restaurant" to search again, which becomes troublesome and wastes the user's time

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