Returning the Coordinates of the Root Bounding Box

The root page of an R-tree index contains the bounding box that encloses all the objects in the index. It is often useful to know the exact coordinates of this bounding box. For example, Step 5 in the procedure described in the section Clustering Spatial Data on the Disk uses this measurement. One common use of this information is to set the scale of a display screen before retrieving data.

To return the coordinates of the root bounding box, use the rtreeRootBB() function.