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Method for quickly displaying monomer model in massive geographical information three-dimensional models

A technology of geographic information and 3D models, which is applied in the field of fast display of single models, can solve the problems of being unable to use normally in the system and taking a long time, and achieve the effects of improving search and calculation speed, improving display efficiency, and efficient display

Inactive Publication Date: 2013-11-27
TIANJIN INST OF SURVEYING & MAPPING +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0002] In the urban 3D geographic information system, because the management area usually has tens of thousands of square kilometers, it may even expand into multiple cities. If the current resolution terrain data, image data and 3D model data are used in such a range, The amount of data generally exceeds TB, or even several TB, and the number of single models it has is usually several million. Using existing traditional methods, even if database retrieval technology is adopted, it is necessary to find out in such massive data at any time. The single 3D model we need and display it takes a long time, so that it cannot be used normally in the system

Method used

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Embodiment Construction

[0015] The present invention will be further described in detail below through the specific examples, the following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention with this.

[0016] A method for quickly displaying a single model in a massive three-dimensional model of geographic information, the steps of the method are as follows:

[0017] (1) Establishment of massive 3D models of geographic information: use computers, computer graphics cards, digital cameras, and stereoscopic image measuring instruments to establish 3D models through manual collection of 3D frames of 3D targets of geographic information, and then map the 3D models obtained by digital cameras Massive 3D models of geographical information are produced by attaching them to the 3D stereoscopic model;

[0018] (2) Establishment of quick search unit: Divide the massive 3D model data of geographic information into several grids according to the geograp...

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Abstract

The invention relates to a method for quickly displaying a monomer model in massive geographical information three-dimensional models. The method comprises the following steps of (1) constructing the geographical information massive three-dimensional models; (2) constructing quick searching units; (3) constructing unique ID (identifications) of the quick searching units; (4) displaying the monomer model. The quick searching units in a region covered by a window display range can be quickly calculated; the searching and calculating speed can be increased by tens of thousands of times by finding out the required monomer three-dimensional model from the quick searching units; high-efficiency displaying of the massive geographical information three-dimensional models can be also realized even through a general commercial PC (personal computer) machine.

Description

technical field [0001] The invention belongs to the field of three-dimensional model display, in particular to a method for rapidly displaying single models in massive three-dimensional models of geographic information. Background technique [0002] In the urban 3D geographic information system, because the management area usually has tens of thousands of square kilometers, it may even expand into multiple cities. If the current resolution terrain data, image data and 3D model data are used in such a range, The amount of data generally exceeds TB, or even several TB, and the number of single models it has is usually several million. Using existing traditional methods, even if database retrieval technology is adopted, it is necessary to find out in such massive data at any time. It takes a long time to display the single 3D model we need, so that it cannot be used normally in the system. Contents of the invention [0003] The purpose of the present invention is to overcome...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30G06T17/00
Inventor 马华山王冬周奎黄勇周义军
Owner TIANJIN INST OF SURVEYING & MAPPING
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