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A method to realize the linkage and fusion of 3D geographic information system and 3D graphics system

A technology of geographic information system and three-dimensional graphics, which is applied in the field of realizing the linkage and integration of three-dimensional geographic information system and three-dimensional graphics system, can solve the problem of no linkage and integration of three-dimensional geographic information system and three-dimensional graphics system, and achieve the effect of eliminating the feeling of beating

Active Publication Date: 2017-06-23
中国电建集团城市规划设计研究院有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no method of linkage and integration between 3D geographic information system and 3D graphics system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0020] In this example, 3D GIS and 3D graphics are integrated in the same viewport area. The positions and sizes of the 3D graphics window and the 3D GIS window are the same, and only one of the windows is displayed at the same time; by controlling the display of the 3D GIS window and the 3D graphics window To achieve the effect of scene switching.

[0021] Set the conditions for switching between 3D GIS and 3D graphics: set the threshold D1 for switching from 3D GIS to 3D graphics, and the threshold D2 for switching from 3D graphics to 3D GIS, where D2>D1. Calculate the distance Dt from the current viewpoint position to the reference point position in real time. When DtD2, switch from the 3D graphics window to the 3D GIS window.

[0022] Align 3D GIS coordinates with 3D graphic coordinates: Generally, 3D GIS uses Gaussian coordinates or spherical geodetic coordinate systems, while 3D graphic systems use their own 3D Cartesian coordinates. Therefore, when the window is switch...

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PUM

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Abstract

The invention relates to the field of computer software applications, which discloses a method for realizing the linkage and fusion of a three-dimensional geographic information system and a three-dimensional graphics system, and realizes the viewpoint linkage between the three-dimensional GIS and the three-dimensional graphics system, thereby reducing or eliminating the need for users to operate the three-dimensional GIS and the three-dimensional graphics system. The jumping feeling when switching 3D graphics achieves the experience effect of smooth transition when switching between systems. This method overlaps the windows of the 3D geographic information system and the 3D graphics system, and dynamically switches by judging the distance between the viewpoint and the observed object. Display the window of one of the systems. At the same time, by synchronizing the position and direction of the viewpoint in the two systems, the position and direction of the viewpoint in the new system are consistent with the position and direction of the system before switching. The method of the invention is suitable for the integration between three-dimensional geographic system and three-dimensional graphics system, between different three-dimensional geographic information systems, and between different three-dimensional graphics systems.

Description

technical field [0001] The invention relates to the field of computer software applications, in particular to a method for realizing linkage and fusion of a three-dimensional geographic information system and a three-dimensional graphics system. Background technique [0002] At present, the 3D geographic information system (GIS) is usually used to represent the macroscopic geographic image coordinates and geographic information parameters, and the 3D graphics system is used to represent the refined 3D model and the interactive operation of the model. In some practical applications, it is usually necessary to display both macroscopic geographic information and detailed 3D models. This requirement can be achieved if the two are used in combination. [0003] At present, there are many systems based on the linkage and integration of 2D maps and 3D geographic information systems, and the linkage of 2D maps and 3D graphics. However, there is no method for linkage and integration ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/0481G06T3/00
Inventor 钟维明张志伟陈万涛朱晨黄志澎梁吉欣
Owner 中国电建集团城市规划设计研究院有限公司
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