City three-dimensional model data organization method applicable to network transmission

Abstract

The invention relates to the technical field of geographic space information systems, and provides a city three-dimensional model data organization method. The method comprises the steps of conducting multi-detail and multi-level simplifying pre-process to city three-dimensional model data, establishing a multi-level three-dimensional scene organization structure for a large number of scenes within the range of a whole city, conducting serialization and reestablishment to the three-dimensional model data of network transmission, and conducting dynamic scheduling to the city three-dimensional model data based on visibility computing and level of detail (LOD) computing. Through the establishment of a space index structure of a large number of city three-dimensional model data and automatic multi-detail and multi-level simplification of the city three-dimensional model data, organization optimization is conducted to the three-dimensional model data under the network environment, dynamic scheduling efficiency of the city three-dimensional model data under the network environment is improved, and real-time visual efficiency of the city three-dimensional model data is improved.

Description

technical field [0001] The invention relates to the technical field of geographic space information systems, in particular to a data organization method of a three-dimensional city model. Background technique [0002] A city is a huge complex system. By establishing a three-dimensional digital city that can provide people with all kinds of realistic scene information about the city in an all-round and intuitive way, a three-dimensional and lifelike three-dimensional virtual urban environment is built. In the face of complex cities, managers provide more powerful decision-making tools. With the rapid development of spatial information acquisition technology and 3D modeling technology, the acquisition accuracy and modeling speed of urban 3D model data expressing data content on the ground, surface, and underground have been continuously improved, and the scope of data modeling has been continuously expanded. The increasing nature of data has led to a rapid expansion of its da...

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Problems solved by technology

[0005] The present invention provides a method for organizing 3D model data of a city suitable for network transmission, aiming to solve the problems in the prior art that the visualization efficiency of large-scale 3D model data of a city is low and it is difficult to meet the needs of users

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