Method and device for marking road display text on electronic map

Abstract

The present invention provides a method and device for labeling text displayed on roads on an electronic map. The method includes: acquiring an electronic map at a first display level; creating a first text buffer on the first road that needs to be marked with displayed text; Obtain the existing display text located in the first text buffer on the electronic map, calculate the display area of ​​the existing display text, remove the display area of ​​the existing display text in the first text buffer, and obtain the second text buffer; obtain the required label The third text buffer created on the second road to display the text, the third text buffer and the second text buffer have an overlapping area, remove the overlapping area in the second text buffer, and obtain the first road in the first display The text label area under the grade. By adopting the method and device, the work of manually adjusting the marked text on the electronic map can be replaced, and the marked work of the displayed text on the expressway can be completed in one step, and the displayed text can not be covered.

Description

technical field [0001] The invention relates to the technical field of electronic map production, in particular to a method and a device for marking road display text on an electronic map. Background technique [0002] Displaying text is one of the important contents of electronic maps, and displaying text can greatly improve the expressiveness and comprehensibility of maps. The display text labeling method has always been one of the basic problems in the field of cartography. [0003] In the process of producing electronic maps, electronic map manufacturers will display and mark newly added background elements such as road elements, facility elements, and water system green spaces in a separate process link. Among them, the display text marked from high-level road (high-speed, urban high-speed) elements is the most important. Since a large number of roads are changed every year, the newly added and modified roads should be marked in text every year. [0004] The traditio...

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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