PostGIS uses an R Tree implemented on a GiST index by default, with a pure R tree partially implemented. http://postgis.net/docs/manual-2.1/using_postgis_dbman

PostGIS uses an R Tree implemented on a GiST index by default, with a pure R tree partially implemented. http://postgis.net/docs/manual-2.1/using_postgis_dbmanagement.html#idp7232880 http://postgis.net/docs/manual-2.1/using_postgis_dbmanagemen...