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Acquisition and organization method of topographic data in virtual map

A technology of topographical data and virtual maps, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of complex data and achieve the effect of convenient and reasonable use

Inactive Publication Date: 2010-06-30
CHINA DIGITAL VIDEO BEIJING
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Problems solved by technology

There are also many different file formats for terrain data files applied to GIS. They have different ways of organizing and describing data, but in general, the data described is too complicated, and many data contents are not suitable for the use of virtual map systems. meaningful

Method used

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  • Acquisition and organization method of topographic data in virtual map
  • Acquisition and organization method of topographic data in virtual map
  • Acquisition and organization method of topographic data in virtual map

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Embodiment Construction

[0031] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] Such as figure 1 As shown, the acquisition and organization method of terrain data in the virtual map includes the following steps:

[0033] (1) Read data from the geographic information system database and generate corresponding graphics to draw a map;

[0034] (2) For various elements displayed in the map, select or create attributes belonging to each element;

[0035] (3) Construct the data corresponding to the newly generated elements;

[0036] (4) Store the selected or constructed element attributes and element data in a serialized manner as attribute files and data files, respectively.

[0037] Through data reading, the data is divided into three types of organization: point, line, and surface according to the form of data belonging. Since the basic element of OpenGL surface drawing is a convex polygon, the boundary of the rea...

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Abstract

The invention relates to the virtual technology of three-dimensional terrains, in particular to an acquisition and organization method of topographic data in a virtual map, which comprises the following steps of: reading data from the database of a geographical information system and generating a corresponding graph; aiming at various elements displayed in a map, selecting or creating the attributes belonging to each element; constructing date which correspond to new generated elements; and respectively saving the selected or constructed element attributes and element data as attribute files and data files by using a serialization way. In the invention, the topographic data is constructed by adopting a manual intervention way; aiming at files of different terrains and physiognomies, the same organization structure is adopted to organize the data in the files, thereby enabling the file access to be carried out by adopting the same way; the data construction of earth terrains and physiognomies can be mastered by the control on the attributes of the terrain elements, thereby constructing the earth terrains and physiognomies of different demands so that the virtual map system can moreconveniently and reasonably use the topographic data.

Description

technical field [0001] The invention relates to a virtual technology of three-dimensional terrain, in particular to a method for acquiring and organizing terrain data in a virtual map. Background technique [0002] With the development of computer science, it has become a reality to realize the three-dimensional simulation of the earth by computer. The more famous virtual map systems include Google Earth of Google, Virtual Earth of Microsoft and so on. There are few virtual map systems dedicated to video production, but the applications in this area are extensive. For example, in news production, different regions of the world are often displayed; in weather forecasts, a certain region or even the entire earth is often used. If these areas are all displayed in three dimensions, it will give the audience a very strong visual effect. [0003] The key to realize the virtual scene in the virtual map system is the acquisition of scene data, and there is no special virtual map ...

Claims

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Application Information

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IPC IPC(8): G06F17/30
Inventor 龚浩
Owner CHINA DIGITAL VIDEO BEIJING
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