Topological zoning-based three-dimensional geological automatic modeling method for urban areas

Abstract

The method of three-dimensional geological automatic modeling of urban area based on topological zoning includes: (1) preparation of survey data; (2) topological zoning of urban areas; (3) drawing thegeological section of the interface between urban blocks; (4) Automatic 3D modeling and dynamic updating of urban block geology; (5) Three-dimensional geological automatic modeling in urban area. Theinvention firstly divides a city block into a plurality of city blocks according to a topological zoning rule, draws a shared geological section on an interface of adjacent blocks, then carries out geological three-dimensional automatic modeling of all the city blocks by using prospecting data and geological section, and finally carries out geological three-dimensional automatic modeling of the city block through seamless splicing. On the one hand, the method improves the precision of 3D geological modeling and the efficiency of 3D geological model reconstruction; on the other hand, the method solves the problem of the inconsistency of the three-dimensional geological model of the urban area at the boundary of the block.

Description

technical field [0001] The invention relates to the field of urban geology, in particular to a three-dimensional automatic modeling method for urban area geology based on topological partitions. Background technique [0002] The 3D digitalization of urban geological work is the basic condition for the realization of digital cities, and urban 3D geological modeling is the key technology to realize the digitalization of urban geological work. At the same time, it can provide important geological spatial data and data for solving various complex geological problems encountered in cities Digital means, while providing rich and comprehensive geological information for applications such as urban planning, construction and operation. [0003] At present, gratifying research results have been achieved in the field of urban 3D geological modeling at home and abroad. Based on different types of modeling data sources, 3D geological modeling methods are also different. There are many m...

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Problems solved by technology

However, there are not many research results at present. The existing research results are limited by the diversity of data sources, and it is difficult to completely describe the shape and properties of geological bodies from different perspectives. The efficiency and quality of geological model construction need to be improved.

In particular, the above three types of methods all pay attention to the characteristics of geological work itself, deviate from the needs of urban geological 3D models in the process of urban survey, planning, construction, and operation, and do not follow the axis of traffic road network, the division of plot units, and the phased nature of survey data. The combination of updating, etc. does not consider the problem of both the accuracy and efficiency of urban geological 3D modeling of thousands of square kilometers, and the method has great limitations.

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