An aggregation index clustering method of natural polygon features for spatial knowledge mining

Spatial clustering is one of the important methods to mining spatial knowledge. Existing methods fail to cluster natural polygon features with great differences in geometry and distribution. Hence an aggregation index is proposed to measure distribution density, and a new natural polygon feature clustering method is designed. First, the formula of aggregation index is designed and its effectiveness is verified. Then, on basis of aggregation index and the shortest distance, the affiliation relationship of adjacent polygon features is established to identify the clustering center. Thus, initial clustering group is constructed. Finally, border feature detection principle and adjacent group merging model are provided to obtain better clustering results. Experiments show that compared with MST and MSSCP, the method proposed can take the complexity of geometric and distribution characteristics into account and effectively improve the clustering results of natural polygon features