What kind of visualizations/statistics can I get from PostGIS' GiST index?
If we look at Wikipedia's R-tree entry, there are different R-tree variations and visualizations of bounding boxes of each using ELKI. GiST index is similar to R-Tree index. So is there some method/ extension for this kind of visualization (perhaps through QGIS)?
Edit: Here it is also visualized - how is this achieved?