Three-dimensional model generation method and system

Abstract

The invention discloses a three-dimensional model generation method and system, and the method comprises the steps: obtaining the two-dimensional position data of two-dimensional elements corresponding to a target real scene element and the topographic data of the target real scene element; generating the three-dimensional position data of a needed target there-dimensional model corresponding to the target real scene element according to the two-dimensional position data and the topographic data; carrying out the triangularization of the two-dimensional elements corresponding to the target real scene element; finally generating a target three-dimensional model corresponding to the target real scene element based on the three-dimensional position data and the triangularization result. Therefore, the method can achieve the automatic generation of the three-dimensional model according to the actual two-dimensional position data and the topographic data, is higher in data manufacturing efficiency, and is smaller in model data size. Moreover, because the method takes the actual two-dimensional position data and the topographic data as the data source of the three-dimensional model, the generated three-dimensional model has a higher position matching degree with the real scene element, thereby improving the reference value of a three-dimensional electronic map.

Description

technical field [0001] The invention belongs to the technical field of model construction of electronic maps, and in particular relates to a three-dimensional model generation method and a three-dimensional model generation system. Background technique [0002] The three-dimensional electronic map can provide users with map retrieval functions such as map query and travel navigation through intuitive geographical simulation representations, and has become a new highlight in the development of Internet services today. [0003] In the 3D electronic map, a large number of 3D models corresponding to the elements of the real world are required, such as road models, green space models, fence models, etc. corresponding to roads, green spaces, fences, etc. These models require as efficient a generation rate as possible and as little model data as possible. In addition, in order to ensure the reference value of the 3D electronic map, it is also required that the generated 3D model an...

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Problems solved by technology

[0004] At present, the 3D model is generally generated by manual production or the automatic generation of the 3D model by using related technologies such as oblique photography. The automatic generation method of the technology overcomes the above-mentioned problems of the manual production method. However, because this method uses the actual two-dimensional data collected manually and the data obtained by oblique photography as the data source of the three-dimensional model, the standards of the two data are different, resulting in the construction of the three-dimensional model. The error of the model is large, so the generated 3D model is difficult to match the position of the real scene elements, which affects the reference value of the 3D electronic map

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