A web-based urban 3D modeling method

Abstract

The invention relates to a Web-based three-dimensional city modeling method. The method comprises the following steps that a parameter management module selects and imports a parameter set from a service website according to the ground object type of a city, and performs centralized management and edition on the parameter set; a service website module uploads a DXF (drawing exchange format) file to a server in a form of an original project file; an automatic modeling module acquires the original project DXF file uploaded to the server by a user, converts the DXF file into an SHP format file, reads a style code of an SHP picture element, reads the other parameter information of the SHP picture element, and performs automatic modeling. According to the method, parameter management and parametric modeling are separated, and are connected through the Web, so that the user is only required to perform simple parameter management operation in a familiar AutoCAD (auto computer aided design) software platform, a complex parametric modeling process is automatically implemented by the automatic modeling module on the server, and a technical threshold for the user is lowered.

Description

technical field [0001] The invention belongs to the technical field of computer-aided design, and relates to a Web-based three-dimensional modeling method for cities. Background technique [0002] Digital city represents the development direction of urban informatization and is an important means to promote the informatization of the whole country. Since entering the 21st century, the digital city has developed rapidly and has become one of the most potential strategic high-tech fields. In various application systems of digital cities, 3D city models are gradually replacing 2D city maps, becoming the basis for many fields such as urban planning, urban management, public safety, heritage protection, traffic navigation, tourism and vacation, military defense, film and television entertainment, etc. Geospatial information representation. The construction of traditional 3D city models mainly relies on commercialized computer-aided design software, and adopts a large number of ...

AI Technical Summary

Problems solved by technology

However, this type of technology has a high technical threshold, mainly in the following aspects: it is modeled by formal or structured grammatical rules, so users must master a specific computer language and have certain programming capabilities; the types of urban features Rich and diverse, it is necessary to establish a huge grammar rule base to approach the complex spatial form of the real world; it is difficult to connect with traditional two-dimensional city model data, and it is inconvenient to edit

These problems have seriously restricted the application of parametric technology in the field of urban 3D modeling, and hindered the conversion of existing 2D city maps to 3D city models.

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