A method of urban 3D data organization
A technology of three-dimensional data and cities, applied in the computer field, can solve problems such as slow processing, untimely response, and large amount of single data, and achieve the effect of increasing structure and texture accuracy and improving efficiency
Active Publication Date: 2020-05-22
ZHEJIANG KELAN INFORMATION TECH CO LTD
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Problems solved by technology
[0006] The present invention aims at the disadvantages of three-dimensional space model data in the prior art, due to many data objects, large amount of single data, and complex organization methods, especially the shortcomings of inconvenient management, slow processing, slow loading, and untimely response of massive data, and provides A Method for Urban 3D Data Organization
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[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0022] like Figure 1 to Figure 3 As shown, a method for urban three-dimensional data organization includes the following steps:
[0023] (1) Divide based on the map size of the surveying and mapping data. The division is based on a map of 1:500 in urban areas and a map of 1:2000 in suburban areas. Grid management units are established to divide and manage the original 3D data by unit. ;
[0024] (2) According to the grid management unit established in step (1), a three-dimensional mathematical model is generated based on the calculation based on the spatial distance, model volume and screen pixels, and the three-dimensional mathematical model is driven to generate three-dimensional fine modeling data. The modeling data generates continuously simplified three-dimensional space data, and the definition corresponding to the continuously simpli...
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The invention relates to the technical field of computers, and discloses a city three-dimensional data organization method. The method comprises the following steps: (1) division is carried out with the map size of mapping data as a basis, and a meshed management unit is built; (2) according to the meshed management unit built in the first step, a three-dimensional mathematical model is calculated and generated, three-dimensional refined modeling data are driven to be generated by the three-dimensional mathematical model, and continuously-simplified three-dimensional space data are generated according to the three-dimensional refined modeling data; (3) according to the three-dimensional space data generated in the second step, a multi-class basic geographic information data software automatic configuration scheme is built for each mesh and is stored in a three-dimensional space data packet; and (4) the three-dimensional space data packet is called to be rendered to a target model. Through reasonable data organization, different data classes are loaded according to a picture scale and a space distance, the structure and the texture precision can be added gradually, and the data management efficiency, the transmission efficiency and the processing efficiency can be greatly enhanced.
Description
technical field [0001] The invention relates to the field of computer technology, in particular to a method for organizing three-dimensional city data. Background technique [0002] In the process of establishing the urban model, after a comprehensive comparison and analysis of the current 3D data, which generally uses planning units and urban administrative divisions as management units, and combined with the technical accumulation of urban geographic information, a grid-based model is proposed. Data management mode, its main method is to survey and map topographic map as a grid. By using the grid as the basic modeling unit, the production, processing, database building, publishing and other applications of 3D spatial data are carried out. On the one hand, this method avoids changes in basic management units caused by planning adjustments and administrative division adjustments, and can satisfy long-term scientific management through stable grid methods. At the same time, ...
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IPC IPC(8): G06T17/05G06T15/00
CPCG06T15/005G06T17/05
Inventor 陈利军俞蔚
Owner ZHEJIANG KELAN INFORMATION TECH CO LTD