EPSG
IOGP
2017-10-16
Change of height or depth unit.
Change of unit from metre to US survey foot (ftUS). 1 ftUS = (12/39.37)m ≈ 0.304800609601219m.
United States (USA) - onshore and offshore.
(0,)
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "Conversion", "name": "MSL depth to MSL depth (ftUS)", "method": { "name": "Change of Vertical Unit", "id": { "authority": "EPSG", "code": 1069 } }, "parameters": [ { "name": "Unit conversion scalar", "value": 3.28083333333333, "unit": "unity", "id": { "authority": "EPSG", "code": 1051 } } ], "id": { "authority": "EPSG", "code": 8057 } }
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=unitconvert +z_in=m +z_out=us-ft"> <Layer srs="+proj=unitconvert +z_in=m +z_out=us-ft"> </Layer> </Map>
Definition: SQL (PostGIS)
INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 8057, 'EPSG', 8057, '+proj=unitconvert +z_in=m +z_out=us-ft', 'PROJECTION["Change_of_Vertical_Unit"],PARAMETER["Unit conversion scalar",3.28083333333333]');