Abstract
RBD-tree,a new variant index structure,derived from Ro-tree was introduced in this paper.RBD-tree is an index structure based on node density which is important to measure the node quality.The core idea of RBD-tree is to organize the nodes with similar features together.In reality,the nodes with similar features are often adjacent with each other.Therefore,RBD-tree greatly improves the spatial query efficiency,and optimization of the index structure is independent of storage devices.
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