http://postgis.net/2015/10/07/postgis-2.2.0
PostGIS 2.2.0 is released! Over the last two years a number of interesting new features have been added, such as:
* True nearest-neighbor searching for all geometry and geography types
* New volumetric geometry support, including ST_3DDifference, ST_3DUnion and more
* Temporal data model support and functions like ST_ClosestPointOfApproach to support temporal query
* Spatial clustering functions ST_ClusterIntersecting and ST_ClusterWithin
* Subdividing large geometries with ST_Subdivide
* Fast box clipping with ST_ClipByBox2D
* In-database raster processing with ST_Retile and ST_CreateOverview
* New high-speed native code address standardizer
* Visvalingam-Whyatt geometry simplification with ST_SimplifyVW
* Support for compressed “tiny well-known binary” format with ST_AsTWKB and ST_GeomFromTWKB
See the full list of changes in the news file:
http://svn.osgeo.org/postgis/tags/2.2.0/NEWS
Thanks to everyone who helped with testing and development over this cycle!
Yours,
Team PostGIS