An intelligent classification method for building shape based on fusion of global and local features
Supported by deep learning methods for building shape cognition,it has become a hot research topic in fields such as cartography.The feature mining ability of deep learning can help extract embedded representations of shapes,supporting appli-cation scenarios such as cartographic generalization and spatial retrieval.A graph convolutional neural network model for build-ing shape classification that integrates global features and graph node features is constructed,and validated using building data as an example.Firstly,a weighted building graph is constructed,and then a fusion description of the shape is generated based on the 4 macroscopic shape features of building and the multi-level local and regional structural features of boundary vertice.Graph convolutional neural networks are used to extract multi-level shape information,and the feature coding generated by fu-sing graph representations from different layers is used for shape classification.The experimental results show that compared to the comparative method,the proposed method is more effective in distinguishing the shape categories of different buildings,and the generated feature coding have positive shape discrimination.
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