OGC Two Dimensional Tile Matrix Set specification http://docs.opengeospatial.org/is/17-083r2/17-083r2.html
Original TMS definition from http://schemas.opengis.net/tms/1.0/json/examples/
NZTM2000 and LINZAntarticaMapTilegrid are from GDAL https://github.com/OSGeo/gdal/pull/2505/files#diff-33251b8c7db3e78835102ded8d11d851
The TMS stored in this repo are used in https://github.com/developmentseed/morecantile
Issues / PR are welcome