Method for preventing picture display characters from being mutually overlapped in navigation system

Abstract

The invention provides a method for preventing picture display characters from being mutually overlapped in a navigation system, comprising the following steps of: 1) setting a characters displaying priority: setting the priority of the characters in the picture display according to the types of the display characters, and sequencing; 2) building spatial index for sequenced data according to the longitude and latitude coordinates of the data; 3) obtaining the other characters in a region around the characters by the spatial index for processing the characters, and judging whether the characters are overlapped; 4) according to the overlapping condition, moving the characters coordinates in a stated range, and recursively judging whether the characters are overlapped and moving the coordinates, until that the characters are not overlapped with the surrounding characters, or even if the characters coordinates reach the maximum moving quantity, the characters are still overlapped, namely,the process is unsuccessful; and 5) judging whether can cancel the characters which are unsuccessfully processed according to the priority of the characters. The method can effectively solve the problem that the Chinese characters of display picture in a navigator are mutually overlapped, and can effectively improve the effect and the quality of the picture display.

Description

technical field [0001] The invention relates to a processing method for navigation electronic map data, in particular to a processing method for character display. Background technique [0002] When the navigation system is displaying a map, if there are too many text information in the geographical area displayed on the screen, or there are several texts to be displayed at the same coordinate position, these two situations often cause the texts to overlap each other. On the one hand, the screen display will bring a complicated feeling to the user, or the information that the user cares about will be covered, so that he cannot get the information he needs; In the reading of map data, the amount of redundant data will cause the situation that the map movement and display are not smooth. Therefore, solving this problem is one of the important functions that an excellent car navigation device should have. [0003] Solving the text overlay problem can be handled by the navigat...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to provide a navigation system to prevent the screen display characters from overlapping each other.

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