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Method and system for three-dimensional terrain modeling

A technology of three-dimensional terrain and modeling method, applied in the field of GIS, can solve the problem of illumination model affecting system efficiency, etc., and achieve the effect of improving system efficiency

Inactive Publication Date: 2011-07-06
CHINA DIGITAL VIDEO BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a three-dimensional terrain modeling method and system to solve the problem that the self-built illumination model affects the system efficiency

Method used

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  • Method and system for three-dimensional terrain modeling
  • Method and system for three-dimensional terrain modeling

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Embodiment Construction

[0052] In order to make the above objectives, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] Since the D3D three-dimensional engine provides modeling, lighting and other simulations, which well meets the requirements for making three-dimensional terrain, the present invention uses the D3D three-dimensional engine to construct a three-dimensional model without the need to construct a lighting model by itself, thereby improving system efficiency.

[0054] Among them, Direct 3D (D3D) is a display program developed by Microsoft to improve the display performance of 3D games in WIN 95 / 98. It is a 3D graphics API based on Microsoft's common object mode COM (Common ObjectMode).

[0055] The following examples are used to describe in detail.

[0056] Reference figure 1 , Is a flowchart of a method for modeling three-di...

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Abstract

The invention provides a method and a system for three-dimensional terrain modeling. The method comprises the following steps: reading altitude data; converting the altitude data to three-dimensional space coordinates and constructing a three-dimensional model; calculating the color information and normal vector of each vertex in the three-dimensional model; and rendering the three-dimensional model. By using a D3D (display 3-dimensional) three-dimensional engine for constructing the three-dimensional engine, the method can well meet the requirement of the three-dimensional terrain because the D3D three-dimensional engine can simulate modeling, illumination and the like, thereby omitting the construction of an illumination model and improving the system efficiency.

Description

Technical field [0001] The present invention relates to the field of GIS technology, in particular to a three-dimensional terrain modeling method and system. Background technique [0002] GIS stands for Geographic Information System (Geographic Information System). It is a computer-based tool that can map and analyze things and events that occur on the earth. GIS technology integrates the unique visual effects of maps and geographic analysis functions with general database operations (such as query and statistical analysis). This ability distinguishes GIS from other information systems, and makes it practical in interpreting events, predicting results, and planning strategies in a wide range of public and individual enterprises and institutions. Geographic information systems are widely used in resource surveys, environmental assessments, disaster prediction, land management, urban planning, post and telecommunications, transportation, military public security, water conservancy...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00
Inventor 胡守刚
Owner CHINA DIGITAL VIDEO BEIJING
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