Road intersection display method, road intersection drafting module and navigation system

Abstract

The invention discloses a method for displaying road crossed positions, a module for drawing the road crossed positions and a navigation system. The method for displaying road crossed positions in the navigation system comprises: reading the median elevations at the crossed positions of related crossed roads; comparing the median elevations at the crossed positions of the roads to tell if the median elevations are equal, and, if the median elevations at the crossed positions of the roads are equal, drawing the crossed positions of the roads and making all curb lines at the crossed positions of the roads unconnected; if the median elevations at the crossed positions of the roads are unequal, drawing the crossed positions of the roads and making the curb lines of the road having the largestmedian elevation connected and the curb lines of other roads having smaller median elevations unconnected; and at the same time, drawing the crossed positions of the roads with a three-dimensional median elevation effect which shows the differences between the median elevations. Due to the step of drawing the crossed positions of the roads with the three-dimensional median elevation effect which shows the differences between the median elevations during the drawing of the crossed positions of the roads with different median elevations, the method allows whether crossed positions of the roads are crossings or road overpasses to be told on a navigation picture and facilitates the use of a navigation system of a user.

Description

technical field [0001] The invention relates to the field of GPS navigation, and more specifically, relates to a method for displaying road intersections in a navigation system, a road intersection drawing module and a navigation system. Background technique [0002] At present, the global positioning system (Global Positioning System, GPS) for vehicles is one of the important application directions of GPS navigation. The GPS antenna of the car GPS navigation system receives the data information transmitted by at least 3 of the 24 GPS satellites around the earth, combined with the electronic map stored in the car navigation terminal, the position coordinates determined by the GPS satellite signal and this match to determine the exact position of the navigation object in the electronic map. [0003] figure 1 Shows the structural composition of the existing navigation system: [0004] Described navigation system comprises: loudspeaker 1, storage device 2, input device 3, so...

AI Technical Summary

Problems solved by technology

[0020] Since the existing navigation systems all use this display method to display the intersecting relationship of roads, the distinction between the two intersecting relationships is not obvious enough from the navigation screen

In the process of using, users often look at the navigation screen displayed by the navigation system while driving, and often cannot quickly identify whether the road intersection on the navigation screen displayed by the navigation system is an intersection or an overpass road, which will easily cause users Misidentification, causing inconvenience to users

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