Method and device for displaying three-dimensional GIS (geographic information system) model

A display method and technology of a display device, which are applied in the field of geographic information systems, can solve the problems of slow loading speed and low efficiency of a three-dimensional GIS model, and achieve the effect of improving efficiency

Inactive Publication Date: 2014-12-24
GUANGDONG VTRON TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0004] However, the existing technical vector data is stretched to generate a white model. If a refined model with high precision needs to be displayed, it is necessary to repeatedly load the refined model.
Usually the loading speed is relatively slow, resulting in very low efficiency of 3D GIS model display

Method used

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  • Method and device for displaying three-dimensional GIS (geographic information system) model
  • Method and device for displaying three-dimensional GIS (geographic information system) model

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] see figure 1 Shown, a kind of three-dimensional GIS model display method comprises the following steps:

[0020] Step S101, acquiring vector data for generating a model, generating a corresponding model to be displayed according to geometric primitive data associated with the vector data or generating a corresponding model to be displayed based on height data associated with the vector data. The model to be displayed can be a geometric model without texture by pulling up the vector data. It should be noted that the corresponding model to be displayed can be generated according to the geome...

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Abstract

The invention provides a method and a device for displaying a three-dimensional GIS (geographic information system) model. The method comprises the following steps of obtaining vector data for generating the model, and according to geometric primitive data correlated with the vector data, generating the corresponding to-be-displayed model, or according to the height data correlated with the vector data, generating the corresponding to-be-displayed model; according to the current vision point height and vision field range, judging if the to-be-displayed model of the corresponding display area needs to be displayed and the to-be-displayed model needs to be subjected to texture rendering or not; if so, finding the corresponding texture from a pre-generated texture base, performing the texture rendering on the to-be-displayed model according to the finding results, and displaying the to-be-displayed model subjected to the texture rendering. The method and the device for displaying the three-dimensional GIS model can be used for improving the efficiency of refining display of massive three-dimensional GIS models.

Description

technical field [0001] The invention relates to the technical field of geographic information systems, in particular to a three-dimensional GIS model display method and a three-dimensional GIS model display device. Background technique [0002] On the video wall system, the good support of 3D GIS (Geographic Information System, geographic information system) massive model data is definitely a big blow to the market. In the prior art, the vector data in the 2D GIS development process is usually used when generating massive 3D GIS models, and users can quickly batch model by stretching the vector data, which saves a lot of labor. [0003] For example: quickly generate a rendering of high-rise buildings through the urban planning plan to provide a forward-looking preview for urban construction planning. Support terabyte-level vector data to generate white models, which is sufficient for city-level GIS applications. For example, through rapid modeling of all buildings in Beijin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30G06T17/05
CPCG06F16/2237G06F16/29G06T17/005G06T17/05
Inventor 林良辉
Owner GUANGDONG VTRON TECH CO LTD
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