Navigation apparatus for searching interest point and method for searching interest point

Abstract

The invention relates to a navigation device capable of searching interest points and a method for searching interest points. The Chinese characters related to name data of all interest points in an interest point name database are arranged in a certain sequence, and an index item consisting of index records is set for each different Chinese character, wherein each index record of the index item corresponds to one interest point name data including the specific Chinese character, and all of the index items constitute the interest point index database of the navigation device. Each index record includes a name code corresponding to the interest point name data and a position code of the position of the specific Chinese character in the interest point name data. When the navigation device is used for searching the interest points, the records of each index item corresponding to the inputted character sequence are compared one by one to obtain a group of index records satisfying the requirement, and interest points are displayed after extracting the interest point name data according to the group of index records. The navigation device has the advantage of reliable, simple and rapid searching.

Description

Navigation device capable of retrieving points of interest and method for retrieving points of interest technical field The invention relates to a method for retrieving interest points of a navigation device. Background technique Points of interest refer to places that are more important or frequently used in a certain area and face the whole society, such as banks, major shopping malls, major business buildings, hotels, government agencies, entertainment venues, major scenic spots, etc. The addresses of units belonging to a certain industry in the region, such as the addresses of units in electrical appliances manufacturing and clothing sales. Chinese patent document CN1924526A discloses an electronic map keyword retrieval method and device for satellite navigation. The method includes: the user inputs keywords to be retrieved through the touch screen of the navigator, and selects the keyword category and the geographical range to be retrieved, and then the central proc...

AI Technical Summary

Problems solved by technology

The disadvantage of the above prior art is that when the existing navigation system retrieves the points of interest, it can only retrieve the relevant points of interest within the preset geographical range around the current location or within the geographical range along the route. The scope is small, resulting in incomplete search results

In addition, although the existing navigation system can choose to search in a larger geographical range when executing the retrieval program, so as to obtain more complete retrieval results, this will greatly increase the data of the points of interest to be retrieved, because the existing The retrieval method is to compare the required POI name with the POI name in the larger geographical range one by one, the data usage is large, so that the memory of the navigation system is greatly occupied, resulting in insufficient memory, resulting in a slow retrieval process , and even the navigation system crashes, which greatly affects the retrieval efficiency and even affects the normal use of the navigation system

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