foot
EPSG example wellbore local vertical CRS (ft)
EPSG example wellbore vertical datum
EPSG
IOGP
2019-02-17
Wellbore survey.
Vertical component of wellbore cubic CRS (CRS code 8821). Depth is relative to the zero depth point used during wellbore survey (e.g. derrick floor).
Description of the extent of the CRS.
Vertical CS. Axis: local depth (d). Orientation: down. UoM: ft.
Definition: OGC Well Known Text
VERT_CS["EPSG example wellbore local vertical CRS (ft)", VERT_DATUM["EPSG example wellbore vertical datum",2005, AUTHORITY["EPSG","1205"]], UNIT["foot",0.3048, AUTHORITY["EPSG","9002"]], AXIS["Local depth",DOWN], AUTHORITY["EPSG","8897"]]
Definition: OGC Well Known Text 2 (2019)
VERTCRS["EPSG example wellbore local vertical CRS (ft)", VDATUM["EPSG example wellbore vertical datum"], CS[vertical,1], AXIS["local depth (d)",down, LENGTHUNIT["foot",0.3048]], USAGE[ SCOPE["Wellbore survey."], AREA["Description of the extent of the CRS."], BBOX[-90,-180,90,180]], ID["EPSG",8897]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "VerticalCRS", "name": "EPSG example wellbore local vertical CRS (ft)", "datum": { "type": "VerticalReferenceFrame", "name": "EPSG example wellbore vertical datum" }, "coordinate_system": { "subtype": "vertical", "axis": [ { "name": "Local depth", "abbreviation": "d", "direction": "down", "unit": { "type": "LinearUnit", "name": "foot", "conversion_factor": 0.3048 } } ] }, "scope": "Wellbore survey.", "area": "Description of the extent of the CRS.", "bbox": { "south_latitude": -90, "west_longitude": -180, "north_latitude": 90, "east_longitude": 180 }, "id": { "authority": "EPSG", "code": 8897 } }
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+vunits=ft +no_defs +type=crs"> <Layer srs="+vunits=ft +no_defs +type=crs"> </Layer> </Map>
Definition: SQL (PostGIS)
INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 8897, 'EPSG', 8897, '+vunits=ft +no_defs +type=crs', 'VERT_CS["EPSG example wellbore local vertical CRS (ft)",VERT_DATUM["EPSG example wellbore vertical datum",2005,AUTHORITY["EPSG","1205"]],UNIT["foot",0.3048,AUTHORITY["EPSG","9002"]],AXIS["Local depth",DOWN],AUTHORITY["EPSG","8897"]]');