Map annotation display method and device based on inheritance characteristics

Abstract

The invention provides a map annotation display method and device based on inheritance characteristics. The method comprises the following steps: extracting map annotations contained in scale maps ofdifferent levels from existing map data, and assigning unique annotation points ID for the extracted map annotations; reading the annotation points ID of the map annotations displayed on the scale mapof all levels respectively, and recording the annotation points ID in a preset list; obtaining the annotation points ID of the map annotations contained in the scale map of any level, judging whetherthe map annotations contained in the scale map of any level are displayed in the adjacent level scale map according to the annotation points ID recorded in the preset list, and if yes, increasing thedisplay priority of the map annotations contained in the scale map of any level and displayed in the adjacent level scale map. Therefore, according to the embodiment of the invention, the priority ofthe map annotations in the scale maps of adjacent levels is increased by weighting the inheritance specific gravity so as to improve the consistency of map annotation display in the scale map of alllevels.

Description

technical field [0001] The invention relates to the field of computer application technology, in particular to a method and device for displaying map notes based on inheritance characteristics. Background technique [0002] The map scale is the ratio of the length of the line segment on the map to the length of the corresponding line segment on the ground. The larger the map scale, the smaller the error and the higher the measurement accuracy on the map. Corresponding map notes, such as place names, river names, mountain names, etc., will be displayed at different levels of scale. [0003] Usually, for important annotation points, both the small scale and the large scale need to be displayed, but in the actual map display, for example, under a certain level of scale, the priority of important annotation points may be marked by more important annotations Points are avoided, resulting in important note points not being displayed. Therefore, it is necessary to improve the dis...

AI Technical Summary

Problems solved by technology

[0003] Usually, for important annotation points, both the small scale and the large scale need to be displayed, but in the actual map display, for example, under a certain level of scale, the priority of important annotation points may be marked by more important annotations The point is avoided, which causes the important note point to not be displayed

Images