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An algorithm about spatial association rule mining which is based on concept lattice is presented. Firstly, a concept lattice (a concept hierarchy) diagram is given, Moreover, databases and selected, transform spatial data into attribute data by generalizing spatial are introduced. Then the method of build spatial concept lattice by using: generalize spatial relationships into attribute relationships is given. Finally, an improvement algorithm of spatial association rule mining based concept lattice is offered and the experiment results show the algorithm is effective.