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A Schematic Map Animation Method Based on Physical Simulation

A physical simulation and physical model technology, applied in the field of data visualization, can solve problems such as the lack of effective and feasible methods, achieve the effect of reducing the development cycle and investment effort, and avoiding the process of parameter adjustment and trial and error

Active Publication Date: 2020-05-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research on schematic maps mainly focuses on the generation algorithm of static maps, and there is a lack of effective and feasible methods for how dynamic data changes in geographic space.

Method used

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  • A Schematic Map Animation Method Based on Physical Simulation
  • A Schematic Map Animation Method Based on Physical Simulation
  • A Schematic Map Animation Method Based on Physical Simulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Embodiment one, as Figure 1-Figure 4 As shown, the inventor tested ten sets of random attribute data in the United States. Since Alaska and Hawaii are not connected to other states in the United States, additional operations are required. For simplicity, the changes in the two states are not considered here. In the key frame generation stage, although the error between the actual area and the ideal area of ​​individual areas is larger than that of other areas, the error of the overall area of ​​the map is small.

Embodiment 2

[0089] Embodiment two, such as Figure 5 As shown, the inventor tested the changes in the express delivery business volume in mainland China over the years from 2005 to 2014. The data comes from the National Data Network. Among them, since Hainan Province is not connected to other mainland regions, additional operations are required, which will not be considered here. The express business is concentrated in the southeast, and Guangdong, Zhejiang, Jiangsu, Shanghai and other places have always been the hot spots of the national express business. In contrast, the business volume in northwest regions such as Xinjiang and Ningxia is relatively small; Since 2006, the express delivery business in various places has developed steadily, and the northwest region, which is at the bottom, is not far behind and has grown significantly. The above characteristics of attribute data are especially evident in animation effects.

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Abstract

The invention discloses a schematic map animation method based on physical simulation. The method is used to present changes of attribute data along with time in a geographic area. The method comprises the following steps of through a map deformation algorithm, generating a static schematic map and taking as a key frame; and establishing a spring-mass point model for a two-dimensional map, then solving a stress deformation problem of an elastic object under a space-time constraint so that the schematic map can naturally and smoothly change among the key frames. By using the method, animation can reach good changing effect and an information expression capability. Compared to a direct interpolation method, by using the method, a lot of adjusting-parameter try and error processes can be avoided; and conditions which do not accord with a reality are not generated, such as block overlapping and the like.

Description

technical field [0001] The invention relates to the field of data visualization, in particular to a schematic map method for displaying dynamic data. Background technique [0002] The continuous schematic map (Cartogram) is a thematic map in which the area of ​​the area is proportional to the attribute data, and the adjacency relationship and the relative position between the areas are given priority. It has an intuitive and clear visualization effect. People have made many explorations on the generation algorithms of continuous schematic maps. The "Rubber-Sheet Distortion" algorithm proposed by Dougenik (Dougenik J A, Chrisman N R, Niemeyer DR, "AN ALGORITHM TO CONSTRUCTCONTINUOUS AREA CARTOGRAM," Professional Geographer, vol.37, no.1, pp.75:81, 1985), will The map is regarded as a "force field". In each iteration, the displacement of the vertices is proportional to the "resultant force" received, and finally an effective schematic map is generated. The algorithm based on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T13/80
CPCG06T13/80
Inventor 任重沈雪周昆
Owner ZHEJIANG UNIV