In n-dimensional space (each dimension range of 0-1) to insert values on the basis of geographical coordinates. From a partition of space began to insert, once the provisions of the cache is full of the cache on the application of new space. cache after the full deposit value in the document. Each district is divided into one 2n, has a built-2n-tree structure used to manage.

Partition
.........\BFile.cpp
.........\BFile.h
.........\Cache.cpp
.........\Cache.h
.........\generaldef.h
.........\qtree.cpp
.........\qtree.h
.........\quadtree4.cpp
.........\utility.cpp
.........\utility.h

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