Method for converting three-dimensional house model into two-dimensional vector plane with height attributes

Abstract

The invention discloses a method for converting a three-dimensional house model into a two-dimensional vector surface with a height attribute. The method comprises the steps of obtaining vector slicedata content; extracting three-dimensional building information according to the vector slice data content; obtaining the number of three-dimensional building vertexes and coordinate element positionsof the three-dimensional building vertexes based on the three-dimensional building information, and calculating the height of the three-dimensional building by utilizing the number of the three-dimensional building vertexes and the coordinate element positions of the three-dimensional building vertexes; calculating polygonal contour edges in the three-dimensional building, and extracting coordinate values of the polygonal contour edges; performing polygon contour edge coordinate conversion according to the polygon contour edge coordinate values to obtain a coordinate string data set; and storing the three-dimensional building height and coordinate string data set to the shp object. In this way, the two-dimensional vector surface data corresponding to the three-dimensional building of theinternet map can be obtained, the building height can be extracted, and the timeliness of the data is consistent with the latest data updated by the internet map.

Description

technical field [0001] The invention relates to the technical field of the Internet, in particular to a method for converting a three-dimensional house model into a two-dimensional vector surface with height attributes. Background technique [0002] With the continuous development of GIS big data, the analysis and application of spatial data are becoming more and more extensive. Among them, the analysis of population flow and density and the analysis of the temporal and spatial location of population are becoming more and more important, while the combined analysis of population and housing is more and more important. is the top priority, so the demand for housing construction data is very urgent and important. [0003] However, traditional GIS data manufacturers often do not perform as well as Internet map data update for data update, and the architectural integrity and coverage area of ​​Internet map are more comprehensive. However, due to the upgrade of the front-end vis...

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Problems solved by technology

[0004] In response to the above problems, there are currently some methods for extracting Internet vector slices, but they are all based on the plaintext data obtained from the older Internet map service interface, which does not contain height information, and the data update cannot reach the quality of the new interface data; currently There is no proper data parsing algorithm for the new interface that can convert the 3D building information in the Internet map into 2D building data with height attributes

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