Class Summary Class Description FlatRStarTreeFlatRTree is a spatial index structure based on a R*-Tree but with a flat directory. FlatRStarTreeFactory<O extends NumberVector>Factory for flat R*-Trees. FlatRStarTreeFactory.Par<O extends NumberVector>Parameterization class. FlatRStarTreeIndex<O extends NumberVector>The common use of the flat rstar tree: indexing number vectors. FlatRStarTreeNodeRepresents a node in a flat R*-Tree.