STICC: a multivariate spatial clustering method for repeated geographic pattern discovery with consideration of spatial contiguity. Issue 8 (3rd August 2022)

• Record Type: Journal Article
• Authors: Kang, Yuhao; Wu, Kunlin; Gao, Song; Ng, Ignavier; Rao, Jinmeng; Ye, Shan; Zhang, Fan; Fei, Teng
• Is Part Of: International journal of geographical information science. Volume 36:Issue 8(2022)
• Page Start: 1518
• Page End: 1549
• Publication Date: 2022-08-03
• Subjects: Spatial clustering -- spatial partition -- regionalization -- GeoAI -- spatial contiguity; Geography -- Data processing -- Periodicals; Information storage and retrieval systems -- Periodicals; Géomatique -- Périodiques; Systèmes d'information -- Périodiques; 910.285
• DOI: 10.1080/13658816.2022.2053980
• Languages: English
• ISSNs: 1365-8816

Abstract

Abstract: Spatial clustering has been widely used for spatial data mining and knowledge discovery. An ideal multivariate spatial clustering should consider both spatial contiguity and aspatial attributes. Existing spatial clustering approaches may face challenges for discovering repeated geographic patterns with spatial contiguity maintained. In this paper, we propose a Spatial Toeplitz Inverse Covariance-Based Clustering (STICC) method that considers both attributes and spatial relationships of geographic objects for multivariate spatial clustering. A subregion is created for each geographic object serving as the basic unit when performing clustering. A Markov random field is then constructed to characterize the attribute dependencies of subregions. Using a spatial consistency strategy, nearby objects are encouraged to belong to the same cluster. To test the performance of the proposed STICC algorithm, we apply it in two use cases. The comparison results with several baseline methods show that the STICC outperforms others significantly in terms of adjusted rand index and macro-F1 score. Join count statistics is also calculated and shows that the spatial contiguity is well preserved by STICC. Such a spatial clustering method may benefit various applications in the fields of geography, remote sensing, transportation, and urban planning, etc.