Colocation mining is one of the major spatial data mining tasks. When discovering colocation patterns, spatial statistics or data mining approaches are commonly used. Colocation mining results are typically presented in a textual form and do not provide any spatial information; thus,
the results lack an intuitive approach to obtain cognition of colocation rules. Here, we propose a visualization approach to discover colocation patterns for two independent point distributions and generate visual results. This approach makes use of the ability of human color perception. For
two geographic features, our approach first generates density surfaces of the input features and then visualizes the density surfaces using a red or green light with different intensities. Then, based on the law of additive color mixing, our approach mixes the colors of the two density surfaces
to generate a colocation rule map. The visualization approach can also provide local details of colocation and be used for local colocation analysis. Users can detect colocation patterns and their distribution from the colocation rule maps. We use both synthetic data and real data to test
the performance of our approach.
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Spatial data mining;
colocation rule map;
Document Type: Research Article
College of Resources and Environmental Science, Hunan Normal University, Changsha, China
School of Resource and Environment Sciences, Wuhan University, Wuhan, China
School of Geographic and Biologic Information, Nanjing University of Posts and Telecommunications, Nanjing, China
Publication date: March 4, 2019
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