EPSG
IOGP
2017-10-16
Change of height or depth unit.
Change of unit from metre to International foot (ft). 1ft = 0.3048. For States which have adopted International feet for their State Plane coordinate systems.
United States (USA) - onshore - Arizona; Michigan; Montana; North Dakota; Oregon; South Carolina.
(0,)
Definition: OGC Well Known Text 2 (2019)
CONVERSION["NAVD88 height to NAVD88 height (ft)", METHOD["Change of Vertical Unit", ID["EPSG",1069]], PARAMETER["Unit conversion scalar",3.28083989501312, SCALEUNIT["unity",1], ID["EPSG",1051]], ID["EPSG",8229]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "Conversion", "name": "NAVD88 height to NAVD88 height (ft)", "method": { "name": "Change of Vertical Unit", "id": { "authority": "EPSG", "code": 1069 } }, "parameters": [ { "name": "Unit conversion scalar", "value": 3.28083989501312, "unit": "unity", "id": { "authority": "EPSG", "code": 1051 } } ], "id": { "authority": "EPSG", "code": 8229 } }
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=unitconvert +z_in=m +z_out=ft"> <Layer srs="+proj=unitconvert +z_in=m +z_out=ft"> </Layer> </Map>
Definition: SQL (PostGIS)
INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 8229, 'EPSG', 8229, '+proj=unitconvert +z_in=m +z_out=ft', 'PROJECTION["Change_of_Vertical_Unit"],PARAMETER["Unit conversion scalar",3.28083989501312]');