Why "RTree" is geographically even distribution while "RBush" is NOT?

[hoogw]

tree.search()
when I limit result count, I found it is not geographically distributed.
it clustered, centralized as my another post screenshot shows
#103

original "rtree" performs geographically distributed result, but rBush is NOT, why?

I use same testing data, limit 500 out of 150k point.

I use original 'rtree' logic, I get even distribution of yellow circle point, with same dataset,

when I use rbush, I got clustered, centralized,

rTree ( good even distribution)

rbush ( centralized, not even, )

How to make rBush like rTree output even distribution?
This is critical, clustered map is not usable.

[Volodymyr Agafonkin]

I don’t know, and I don’t think rbush should have a certain distribution in results. Please use rTree if it suites you better.