metre
New Zealand Vertical Datum 2009
EPSG
Land Information New Zealand (LINZ) standard S25004.
2019-07-16
Geodesy, engineering survey, topographic mapping.
Replaced by NZVD2016 from 2016-06-27.
-40.91 174.7
-55.95 160.6
-25.88 179.83
160.6 -55.95
-171.2 -25.88
Definition: OGC Well Known Text 2 (2019)
VERTCRS["NZVD2009 height", VDATUM["New Zealand Vertical Datum 2009"], CS[vertical,1], AXIS["gravity-related height (H)",up, LENGTHUNIT["metre",1]], USAGE[ SCOPE["Geodesy, engineering survey, topographic mapping."], AREA["New Zealand - onshore and offshore. Includes Antipodes Islands, Auckland Islands, Bounty Islands, Chatham Islands, Cambell Island, Kermadec Islands, Raoul Island and Snares Islands."], BBOX[-55.95,160.6,-25.88,-171.2]], ID["EPSG",4440]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "VerticalCRS", "name": "NZVD2009 height", "datum": { "type": "VerticalReferenceFrame", "name": "New Zealand Vertical Datum 2009" }, "coordinate_system": { "subtype": "vertical", "axis": [ { "name": "Gravity-related height", "abbreviation": "H", "direction": "up", "unit": "metre" } ] }, "scope": "Geodesy, engineering survey, topographic mapping.", "area": "New Zealand - onshore and offshore. Includes Antipodes Islands, Auckland Islands, Bounty Islands, Chatham Islands, Cambell Island, Kermadec Islands, Raoul Island and Snares Islands.", "bbox": { "south_latitude": -55.95, "west_longitude": 160.6, "north_latitude": -25.88, "east_longitude": -171.2 }, "id": { "authority": "EPSG", "code": 4440 } }
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+vunits=m +no_defs +type=crs"> <Layer srs="+vunits=m +no_defs +type=crs"> </Layer> </Map>
Definition: SQL (PostGIS)
INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 4440, 'EPSG', 4440, '+vunits=m +no_defs +type=crs', 'VERT_CS["NZVD2009 height",VERT_DATUM["New Zealand Vertical Datum 2009",2005,AUTHORITY["EPSG","1039"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","4440"]]');