Crossing enlarged map display device

Abstract

The invention discloses a crossing enlarged map display device, which comprises a crossing enlarged map data reading module used for reading the map data of the electronic map into the memory, a crossing enlarged map data pre-treating module used for changing the geographical coordinates in the basic map data into corresponding screen coordinates through the weighing analysis of the interest points and the diameter analysis of the crossings, a crossing enlarged map protracting module used for protracting the crossing enlarged map according to the protracting of the data obtained by the crossing enlarged map pre-treating module through the background, the path, the leading line and the interest point information layer, and a crossing enlarged map display device used for displaying the crossing enlarged map protracted by the crossing enlarged map protracting module. Adopting the technical proposal of the utility model, the invention can completely display the information of the crossings.

Description

technical field [0001] The invention relates to the field of electronic navigation, in particular to a display device for an enlarged intersection map. Background technique [0002] Enlarged intersection map means that when the vehicle is at a distance of XXX meters from complex road sections such as forks, overpasses, and roundabouts in front, an enlarged schematic diagram of the intersection ahead will be automatically displayed on the screen, with guiding lines marked on the map to indicate the turning of the intersection. It's a way to broaden the lead. [0003] Existing crossing enlarged map, generally take the crossing to turn to, the roundabout, the overpass as the center point, and draw and display according to the scale of 50 meters or 100 meters. [0004] The prior art intersection enlargement map display device comprises: [0005] The intersection expansion map data reading module is used to read the map data of the electronic map into the memory; the data readi...

AI Technical Summary

Problems solved by technology

[0009] Due to the fixed scale of the existing intersection enlarged map display device, when the structures of intersections, roundabouts, and overpasses are relatively complex and contain a large area, only part of the information of the intersection will be displayed, and part of the map content may serve as a sign. The POI (Point of Interest, point of interest) is not displayed in the enlarged intersection map

As shown in the comparison between Figure 1 and Figure 2, the POI of "McDonald's Zhongguancun Store" may not be displayed during the generation of the enlarged intersection map display device in the prior art

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