Create localtree (a quadtree index of all US block centroids) in global environment

Create localtree (a quadtree index of all US block centroids) in global environment

Usage

indexblocks()

Value

Returns TRUE when done. Side effect is it creates the index in memory.

Details

Note this is duplicated code in .onAttach() and also in global_defaults_*.R

.onAttach() can be edited to create this when the package loads, but then it takes time each time a developer rebuilds/installs the package or others that load EJAM.

It also has to happen in global_defaults_*.R if it has not already.