metre
EPSG
St. Helena Government, Environment and Natural Resources Directorate (ENRD).
2016-11-24
Topographic mapping.
Replaced by SHVD2016 (CRS code 7890) from 2016.
St Helena, Ascension and Tristan da Cunha - St Helena Island - onshore.
-15.96 -5.72
-16.08 -5.85
-15.85 -5.59
-5.85 -16.08
-5.59 -15.85
Definition: OGC Well Known Text 2 (2019)
VERTCRS["Jamestown 1971 height", VDATUM["Jamestown 1971"], CS[vertical,1], AXIS["gravity-related height (H)",up, LENGTHUNIT["metre",1]], USAGE[ SCOPE["Topographic mapping."], AREA["St Helena, Ascension and Tristan da Cunha - St Helena Island - onshore."], BBOX[-16.08,-5.85,-15.85,-5.59]], ID["EPSG",7888]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "VerticalCRS", "name": "Jamestown 1971 height", "datum": { "type": "VerticalReferenceFrame", "name": "Jamestown 1971" }, "coordinate_system": { "subtype": "vertical", "axis": [ { "name": "Gravity-related height", "abbreviation": "H", "direction": "up", "unit": "metre" } ] }, "scope": "Topographic mapping.", "area": "St Helena, Ascension and Tristan da Cunha - St Helena Island - onshore.", "bbox": { "south_latitude": -16.08, "west_longitude": -5.85, "north_latitude": -15.85, "east_longitude": -5.59 }, "id": { "authority": "EPSG", "code": 7888 } }
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 ( 7888, 'EPSG', 7888, '+vunits=m +no_defs +type=crs', 'VERT_CS["Jamestown 1971 height",VERT_DATUM["Jamestown 1971",2005,AUTHORITY["EPSG","1175"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","7888"]]');