Reverse View Field Nearest Neighbor queries

In this paper, we introduce a novel type of spatial query called the Reverse View Field Nearest Neighbor (RVFNN) query. To process the query, we propose two query processing methods on an R*-tree: (1) RVFNN query processing on a sector-based R*-tree and (2) RVFNN query processing on an origin-based R*-tree. In addition, we propose a new type of spatial data index structure called the View Field R-tree (VFR-tree) and a search method for RVFNN queries on the VFR-tree. The VFR-tree overcomes the limitations of the R*-tree by considering both origins and sectors. We carry out various experiments to evaluate the performance and verify the efficiency of the proposed methods.