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Paging multi-level displaying method based on three-dimensional digital city system model

A three-dimensional digital and system model technology, applied in the direction of digital output to display devices, etc., can solve the problems of poor display effect and greatly reduced system display effect, so as to reduce the amount of reading, improve the display efficiency, and reduce the cost of hardware use. Effect

Active Publication Date: 2013-12-11
天津市测绘院有限公司 +1
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AI Technical Summary

Problems solved by technology

If you want to display a rough model, the display effect of the system will be greatly reduced, and the display effect will be very poor

Method used

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Embodiment Construction

[0016] 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.

[0017] A paged multi-level display method based on a three-dimensional digital city system model, the steps of which are as follows:

[0018] ⑴. Using computer, computer graphics card, digital camera and stereoscopic image measuring instrument to manually collect the 3D frame of the 3D target of geographical information to establish a 3D stereoscopic model, and then paste the 3D model texture obtained by the digital camera on the 3D stereoscopic model for production Create a 3D digital city system;

[0019] (2) Divide the single model in the 3D digital city system into three levels according to the distance from the viewpoint in the 3D digital city system to the center of the single model: the first level is the fine display model, and the f...

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Abstract

The invention relates to a paging multi-level displaying method based on a three-dimensional digital city system model. The paging multi-level displaying method includes the following steps that (1), a three-dimensional model is established by the utilization of a computer, a computer graphic display card, a digital camera and a stereoscopic image measurement instrument through a three-dimensional frame which is used for mutually collecting geographic information three-dimensional objects, and then three-dimensional model maps obtained through the digital camera are attached to the three-dimensional model to generate a three-dimensional digital city system; (2), monomer models in the three-dimensional digital city system are divided into three levels according to geographic on-site distances from a viewpoint to the centers of the monomer models; the first level is a fine display model, the second level is a common display model and the third level is a rough display model; (3), a call rule is formulated among the fine display model, the common display model and the rough display model in the step two. A mass of the monomer models in the three-dimensional mode can be rapidly displayed, time is short, efficiency is high and requirements for hardware are low.

Description

technical field [0001] The invention belongs to the field of three-dimensional digital city display, in particular to a page-by-page multi-level display method based on a three-dimensional digital city system model. Background technique [0002] When the traditional 3D digital city system displays the 3D model in the window, it usually finds all the 3D single models within the geographic space range in the window, loads them into the memory from the database, and then puts them into the graphics card for display from the memory. If you want to display the detailed model, the 3D digital city system will be very stuck when browsing, and even the computer will crash or crash when the model data is too large. If you want to display a rough model, the display effect of the system will be greatly reduced, and the display effect will be very poor. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/14
Inventor 韩振镖王冬周丽珠王光昇雷雨
Owner 天津市测绘院有限公司
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