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Currently,temporal and spatial factors are not considered together in current history trajectory indices,and the performance of indexes is sensitive to query size.This paper realizes adaptive octree based Trajectory clustering index(ATTI),which uses octree index spatial and temporal factors together and implements the query workload adaptive mechanism by virtual octree forest.The results show that ATTI can reduce half of range query process delay.

ATTI: Workload-Aware Query Adaptive OcTree Based Trajectory Index