R - tree , like b + tree , is dynamic balanced tree , the search key is based on spatial object ' s minimum bounding rectangle R树是一种类似于b ~ +树的动态平衡树,其索引项基于空间对象的最小外接矩形。
Spatial object ' s minimum bounding rectangle approximately reflects the spatial characters of spatial objects , which speeds the search process 空间对象的外接矩形能够粗略反映出空间对象的空间特性,从而加速空间对象的定位过程。
百科解释
The minimum bounding rectangle (MBR), also known as bounding box or envelope, is an expression of the maximum extents of a 2-dimensional object (e.g.