LorenzBuehmann commented on PR #1344:
URL: https://github.com/apache/jena/pull/1344#issuecomment-1153549005

   This article contains some numbers for JTS `Quadtree` vs `STRtree`: 
https://link.springer.com/article/10.1007/s41019-020-00147-9
   
   It covers 
   * indexing costs
   * index size
   * range queries
   * distance queries
   * point-in-polygon join query
   
   We could keep the `STRtree` for read-only datasets, and I think we have to 
live with the `Quadtree` for read-write Datasets. Internally only `query` 
operation is called on the `STRtree`, thus changing the datastructure should be 
trivial.


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