Drawing method and system for complex network topology graph element notes based on browser

Abstract

The invention discloses a drawing method and system for complex network topology graph element notes based on a browser. The method includes: candidate note positions are arranged around point elements, according to real-time position changes of the point elements, whether there are enough positions for setting the notes around the point elements is determined, a note rectangular dynamic avoiding model is built, the note positions are changed according to the change of the point elements in a screen, the problem that notes are covered by other notes in the condition of the movement of the point elements is avoided, note position configuration of the point elements in the screen is performed, the notes can automatically avoid edges of the screen, and the condition that a part of the note is located outside the screen is prevented. According to the drawing method and system for the complex network topology graph element notes based on the browser, the point elements can be noted and displayed to the maximum, and the condition that confusion occurs since the notes are covered by the edges of the screen can also be avoided.

Description

technical field [0001] The invention relates to an electronic map annotation technology, in particular to a browser-based drawing method and system for annotating complex network topological map point elements. Background technique [0002] Annotation has always been regarded as a part of the map. The language of interpreting the map and the allocation of annotation positions are one of the difficult problems in the process of map making. Electronic maps are easy to carry, real-time, dynamic and other advantages make up for the shortcomings of traditional maps such as large size, not easy to carry, not easy to save, and are used in more and more fields. The electronic map has the characteristics of arbitrarily adjusting the scale, layered display, and three-dimensional display. The real-time and dynamic requirements make it more difficult to place annotations in the electronic map. The dynamic avoidance of annotations is a typical NP difficulty. However, the real-time chang...

AI Technical Summary

Problems solved by technology

[0003] Point features in topology visualization are one of the important components of topological maps. Some topological maps need to know the relevant information of certain point features. The general annotation method cannot meet the needs of point feature annotation in topological maps. For example, annotations are relatively Because the position of the point feature is fixed, when moving a point feature alone, one case is that the annotation does not move with the point feature; the other is that the relative position of the point feature and the annotation remains unchanged, and it will appear In the case of covering other annotations, the location of the annotations does not avoid the edge of the screen, and some annotations are located inside the screen, which will cause trouble for the recognition of point features. Therefore, a new annotation method is needed to label point elements. Related information, and automatically avoid annotations between point features, not overlapping each other

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