Rapid splicing and cutting method for three-dimensional model of digital city

Abstract

The invention relates to a rapid splicing and cutting method for a three-dimensional model of a digital city. The method comprises the steps of extracting a footing contour line of the three-dimensional model and determining a world coordinate origin of the three-dimensional model; performing standardized operation on the three-dimensional model; carrying out contour matching based on the three-dimensional model footing contour line so as to carry out rapid model splicing; extracting cutting information of the three-dimensional model; and performing model cutting according to the cutting information of the three-dimensional model. According to the rapid splicing and cutting method for the three-dimensional model of the digital city, offset information of a single three-dimensional model inthe whole scene is obtained through a model footing contour matching method. Scripts are executed in three-dimensional modeling software, and rapid splicing of the three-dimensional model is achieved. Through standardized operation on the model, the manufacturing quality of the three-dimensional model is ensured. Through block segmentation of a large-size model, fast loading of a three-dimensional digital city can be met through block storage. According to a block storage mode, data storage management, rapid loading and dynamic updating of a large-scale scene are greatly facilitated.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional digital cities, and in particular relates to a method for quickly splicing and cutting three-dimensional models of digital cities. Background technique [0002] With the rapid development of advanced technologies such as virtual reality (VR) and 5G, GIS applications based on two-dimensional data can no longer meet the spatial data representation of urban professional applications. A more intuitive, WYSIWYG three-dimensional spatial data has become a new data expression method that customers are keen on, and it will become the core data of the digital city and even the digital earth. Based on 3D digital scenes, using VR technology can realistically simulate present and future cities, support data analysis, program demonstration and optimization, and support geographic information systems, etc. [0003] In the process of digitalizing high-definition 3D city maps, buildings are photographe...

AI Technical Summary

Problems solved by technology

Digital city processing enterprises in the process of producing 3D models vary from person to person, and cannot guarantee the quality of model production

In the process of merging 3D models, manually drag and drop them to the actual location according to the geographical location of each 3D model, which leads to low assembly efficiency

The division of urban blocks is divided according to the two-dimensional administrative planning map or road map of urban design. The division of each block is very irregular, and data storage is difficult to standardize

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