Method and device for marking electronic map road display text

Abstract

The invention provides a method and device for marking electronic map road display text. The method comprises the steps that an electronic map at a first display level is obtained; a first text buffer area is established on a first road with display text needing marking; existing display text located in the first text buffer area on the electronic map is obtained, a display area of the existing display text is calculated, and the display area of the existing display text is removed from the first text buffer area to obtain a second text buffer area; a third text buffer area established on a second road with display text needing marking is obtained, the third text buffer area and the second text buffer area have an overlapped area, and the overlapped area is removed from the second text buffer area to obtain a text marking area of the first road at the first display level. By the adoption of the method and device, the work for manually adjusting electronic map marked text can be replaced, marking work of expressway display text is completed with one step, and it can be ensured that different pieces of display text do not overlap one another.

Description

Technical field [0001] The present invention relates to the technical field of electronic map making, in particular to a method and device for marking road display characters on an electronic map. Background technique [0002] Display text is one of the important contents of electronic maps. Display text can greatly improve the expressive ability and comprehensibility of the map. Display text labeling method has always been one of the basic problems in the field of cartography. [0003] In the process of electronic map production by electronic map manufacturers, the newly added road elements, facility elements, water system green space and other background elements will be displayed and labeled in a separate process. Among them, the display text marked from the elements of high-grade roads (high-speed, urban highway) is the most important. As a large number of roads change every year, new and revised roads must be marked with text every year. [0004] The traditional method of hig...

AI Technical Summary

Problems solved by technology

In the case of adding and modifying a large number of expressways every year, displaying text labels and adjustments will consume a lot of manpower and material resources

[0008] 2. Repeated adjustments caused the extension of the construction period

[0009] 3. It is difficult to label as many high-level texts as possible

The main method of manually adjusting the displayed text is to upgrade the alternative text generated by the program preprocessing. If the position of the text generated by the original preprocessing is unreasonable, it will be difficult to mark more text to a higher level, which will cause When the final map product is zoomed, a road has no road name text in a large area under a certain level

[0010] Four, error-prone

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