Method for realizing dynamic point ground feature annotation of GIS

Abstract

The invention relates to a method for achieving geography information system object dynamic labeling. The object labeling location can be dynamically adjusted by the real condition; it dose quoting before labeling the object, if the object picture is inside the map window and the labeling content is outside the map window, the system can automatically find out a location inside the window around the object so as to display the labeling inside the map window, if the object labeling location covers the front object picture or the object labeling, the system can automatically find out a vacancy location inside the window around the object so as to undertake the object labeling do not cover the front object picture or the object labeling.

Description

technical field [0001] The invention relates to a method for realizing dynamic annotation of points, features and features in a geographic information system. Background technique [0002] In geographic information systems, traditional labeling techniques are static: the position of labeling information relative to the marked features is fixed. There are two main problems with this technique: [0003] 1. When the marked feature is at the border of the map or the screen, the mark cannot be displayed or the display is incomplete; [0004] 2. When the number of ground features on the map is relatively large and the graphic display scale is relatively small, there will be a phenomenon that the marks of the ground features overlap each other, and the marks cover the ground features, which will cause the entire map to be blurred. This problem can be alleviated by layered display of map content, but the above problem will still occur when there are a large nu...

AI Technical Summary

Problems solved by technology

[0003] 1. When the marked feature is at the border of the map or the screen, the mark cannot be displayed or the display is incomplete;

[0004] 2. When the number of ground features on the map is relatively large and the graphic display scale is relatively small, there will be a phenomenon that the marks of the ground features overlap each other, and the marks cover the ground features, which will cause the entire map to be blurred

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