Geodesy, engineering survey, topographic mapping.
New Zealand - South Island - north of approximately 42°20'S - Nelson vertical CRS area.
-41.44 173.14
-42.44 171.82
-40.44 174.46
171.82 -42.44
174.46 -40.44
Definition: OGC Well Known Text 2 (2019)
VERTCRS["Nelson 1955 height", VDATUM["Nelson 1955"], CS[vertical,1], AXIS["gravity-related height (H)",up, LENGTHUNIT["metre",1]], USAGE[ SCOPE["Geodesy, engineering survey, topographic mapping."], AREA["New Zealand - South Island - north of approximately 42°20'S - Nelson vertical CRS area."], BBOX[-42.44,171.82,-40.44,174.46]], ID["EPSG",5766]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "VerticalCRS", "name": "Nelson 1955 height", "datum": { "type": "VerticalReferenceFrame", "name": "Nelson 1955" }, "coordinate_system": { "subtype": "vertical", "axis": [ { "name": "Gravity-related height", "abbreviation": "H", "direction": "up", "unit": "metre" } ] }, "scope": "Geodesy, engineering survey, topographic mapping.", "area": "New Zealand - South Island - north of approximately 42°20'S - Nelson vertical CRS area.", "bbox": { "south_latitude": -42.44, "west_longitude": 171.82, "north_latitude": -40.44, "east_longitude": 174.46 }, "id": { "authority": "EPSG", "code": 5766 } }
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 ( 5766, 'EPSG', 5766, '+vunits=m +no_defs +type=crs', 'VERT_CS["Nelson 1955 height",VERT_DATUM["Nelson 1955",2005,AUTHORITY["EPSG","5164"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5766"]]');