Three-dimensional visualization method and device for OD relations in GIS

Abstract

The invention provides a three-dimensional visualization method and device for OD relations in a GIS. The method is used for generating a corresponding three-dimensional curve capable of being recognized by a GIS system according to input data of a user and carrying out three-dimensional visual display, and comprises the following steps: S1, obtaining OD relation statistical data used for reflecting the relation between two positions and places; S2, acquiring curve construction information input by a user; S3, generating a curve type; S4, calculating curve heights of the plurality of curves; S5, sampling each curve in sequence so as to calculate sampling point coordinates of a plurality of sampling points corresponding to each curve; S6, converting the data into a corresponding statisticalfile containing all the curves in the GIS according to the curves, the corresponding sampling point coordinates and the OD relation statistical data; and S7, visually displaying the statistical filethrough a three-dimensional visual application.

Description

technical field [0001] The invention belongs to the field of data visualization, in particular to a method and device for three-dimensional visualization of OD relationships in GIS. Background technique [0002] OD generally refers to the starting and ending points of traffic in traffic, O refers to the origin (ORIGIN), and D refers to the end point (DESTINATION). OD traffic volume is a commonly used noun and indicator in the traffic field, reflecting the traffic volume between two points, while in this patent, the content of OD is generalized as the relationship between two points, this relationship can be traffic volume, Reachability, telephone contact volume, similarity, business connection, etc. [0003] The expression and visualization of OD is a very common method in the industry, and the expression of OD is generally realized with the help of professional software and Internet tools. Taking urban and rural planning as an example, practitioners in this industry are m...

AI Technical Summary

Problems solved by technology

Since practitioners currently use ready-made and relatively mature software and tools, the effects obtained are often similar, which may attract attention in the early stage, but as more and more people master these tools, similar There are more and more tools, and the display of OD diagrams has become difficult to grasp and study, forming a bright feeling

[0006] (2) Limited expression information

Since the current mainstream OD expression tools are all on the 2D plane, the information expressed cannot be too much. If there is too much information, the OD lines will be complicated and the expression effect will be disordered (ie figure 1 In the situation shown, too many connections make it difficult to effectively and intuitively represent)

[0007] In order to avoid these defects, methods such as deleting information, gradient expression, color distinction, and simulating parabolas by replacing straight lines are generally used, but some methods will also cause information loss to a certain extent

Human perception is three-dimensional, but there is no convenient and easy-to-use tool for three-dimensional expression of OD relationship

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