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We propose Roadscape-based Route Recommender System (R3), which provides diversified roadscapebased routes. Given starting and destination points, R3 provides four types of roadscape-based routes: rural-, mountainous-, waterside-, and urban-prior routes. To reduce the computational cost, we propose a coarse-to-fine route search approach that consists of a roadscape-based clustering method, roadscape cluster graph, coarse-grained route search, and fine-grained route search. We evaluated thedoi:10.2197/ipsjjip.27.392 fatcat:ntxbt4ky3rbwbjxpdspyllybpu