Method for achieving linkage between two-dimensional map and three-dimensional map on Web page
A three-dimensional map and two-dimensional map technology, applied in the field of geospatial information visualization, can solve the problems that three-dimensional maps cannot be automatically adjusted, lack flexibility, and have a single interface, and achieve the effect of being universal and extensive and improving user experience.
Inactive Publication Date: 2013-11-20
POWERCHINA CHENGDU ENG
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[0010] The technical problem to be solved by the present invention is: to propose a method for realizing 2D and 3D map linkage on a Web page, to solve the problem that the 2D and 3D map linkage cannot be realized on the Web page in the traditional technology, and cannot be automatically adjusted when switching to a 3D map, The problem of single interface and lack of flexibility
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[0026] In order to solve the problems in the traditional technology that the linkage of 2D and 3D maps cannot be realized on the Web page, cannot be automatically adjusted when switching to a 3D map, and the interface is single and lacks flexibility, the present invention proposes a method for realizing 2D and 3D linkage on the Web page , which uses Web Ajax, Javascript and other technologies to synchronize 2D and 3D views through coordinates and view ranges. The 2D view is operated by panning, zooming in, and zooming out. When switching to the 3D view, the range of the current 2D view is obtained through the client script, and then the Javascript API interface function of the 3D plug-in is called to set the coordinate range of the 3D window to realize the synchronization of the display range , and vice versa by the same idea.
[0027] like figure 1 As shown, the method specifically includes:
[0028] A. First establish the two-dimensional scale series and the three-dimensio...
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The invention relates to the field of geographic space information visualization, and discloses a method for achieving linkage between a two-dimensional map and a three-dimensional map on a Web page. The method for achieving linkage between the two-dimensional map and the three-dimensional map on the Web page solves the problems that in the prior art, linkage between the two-dimensional map and the three-dimensional map cannot be achieved on the Web page, automatic adjustment cannot be carried out when the two-dimensional map is switched to the three-dimensional map, and an interface is single and lacks flexibility. The method for achieving linkage between the two-dimensional map and the three-dimensional map on the Web page comprises the steps that (1) technologies such as the Web Ajax technology and the Javascript technology are used, and synchronization of a two-dimensional view and a three-dimensional view is carried out through coordinates and the ranges of the views; (2) the translation operation, the amplification operation and reduction operation are carried out on the two-dimensional view, when the two-dimensional view is switched to the three-dimensional view, the range of the current two-dimensional view is obtained through a client script, a Javascript API interface function of a three-dimensional plug-in is called to set the coordinate range of a three-dimensional window, and synchronization of the display ranges is achieved, and on the contrary, linkage between the two-dimensional map and the three-dimensional map on the Web page is achieved according to the same thinking. The method for achieving linkage between the two-dimensional map and the three-dimensional map on the Web page is applicable to displaying geographic space information in a two-dimensional mode and in a three-dimensional mode.
Description
technical field [0001] The present invention relates to the field of geographic spatial information visualization, and in particular relates to a method for realizing two-dimensional and three-dimensional map linkage on a Web page, which is suitable for two-dimensional and three-dimensional display of geographic spatial information. Background technique [0002] The traditional two-dimensional geographic information system technology is mature but lacks the effect of three-dimensional visualization and virtual simulation, while the three-dimensional geographic information system lacks the convenience and macroscopicity of the two-dimensional geographic information system. At present, the GIS system based on the 2D and 3D hybrid structure realizes the linkage display and query function of geographic information in the 2D and 3D interfaces. The way to realize the linkage of 2D and 3D maps is that the geographical coordinates of the 2D part and the 3D part of the system corresp...
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Inventor 宋述军刘永亮
Owner POWERCHINA CHENGDU ENG