The increasing usage of Geographical Information Systems (GIS) for various problems makes the volume of spatial data is growing fast. Spatial data mining is one of the several ways to find the new knowledge from data collection. One of spatial data mining tasks is spatial association rule. There are numerous association rule algorithms have been developed for mining association. Unfortunately, the most algorithms can only used for mining non-spatial and specific formatted data. Therefore, spatial data preprocessing is needed in order conventional association algorithms can be used for spatial data.
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