Geodesy, engineering survey.
Replaced by ODN (Offshore) height (CRS code 7707) in 2016.
United Kingdom (UK) - Great Britain - Scotland - Flannan Isles onshore.
58.28 -7.61
58.21 -7.75
58.35 -7.46
-7.75 58.21
-7.46 58.35
Definition: OGC Well Known Text 2 (2019)
VERTCRS["Flannan Isles height", VDATUM["Flannan Isles"], CS[vertical,1], AXIS["gravity-related height (H)",up, LENGTHUNIT["metre",1]], USAGE[ SCOPE["Geodesy, engineering survey."], AREA["United Kingdom (UK) - Great Britain - Scotland - Flannan Isles onshore."], BBOX[58.21,-7.75,58.35,-7.46]], ID["EPSG",5748]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "VerticalCRS", "name": "Flannan Isles height", "datum": { "type": "VerticalReferenceFrame", "name": "Flannan Isles" }, "coordinate_system": { "subtype": "vertical", "axis": [ { "name": "Gravity-related height", "abbreviation": "H", "direction": "up", "unit": "metre" } ] }, "scope": "Geodesy, engineering survey.", "area": "United Kingdom (UK) - Great Britain - Scotland - Flannan Isles onshore.", "bbox": { "south_latitude": 58.21, "west_longitude": -7.75, "north_latitude": 58.35, "east_longitude": -7.46 }, "id": { "authority": "EPSG", "code": 5748 } }
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 ( 5748, 'EPSG', 5748, '+vunits=m +no_defs +type=crs', 'VERT_CS["Flannan Isles height",VERT_DATUM["Flannan Isles",2005,AUTHORITY["EPSG","5146"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5748"]]');