EPSG:9451 — BI height

Vertical · Europe - British Isles - UK and Ireland onshore, UKCS

Export Formats

OGC WKT

VERT_CS[
    "BI height",
    VERT_DATUM["British Isles height ensemble",2005,AUTHORITY["EPSG","1288"]],
    UNIT["metre",1,AUTHORITY["EPSG","9001"]],
    AXIS["Gravity-related height",UP],
    AUTHORITY["EPSG","9451"]
]

WKT2

VERTCRS[
    "BI height",
    ENSEMBLE[
        "British Isles height ensemble",
        MEMBER["Malin Head",ID["EPSG",5130]],
        MEMBER["Belfast Lough",ID["EPSG",5131]],
        MEMBER["Ordnance Datum Newlyn",ID["EPSG",5101]],
        MEMBER["Ordnance Datum Newlyn (Offshore)",ID["EPSG",1164]],
        MEMBER["Ordnance Datum Newlyn (Orkney Isles)",ID["EPSG",5138]],
        MEMBER["Lerwick",ID["EPSG",5140]],
        MEMBER["Stornoway",ID["EPSG",5144]],
        MEMBER["Douglas",ID["EPSG",5148]],
        MEMBER["St. Marys",ID["EPSG",5147]],
        ENSEMBLEACCURACY[0.4],
        ID["EPSG",1288]
    ],
    CS[vertical,1,ID["EPSG",6499]],
    AXIS["Gravity-related height (H)",up],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    GEOIDMODEL["ETRS89 to BI height (1)",ID["EPSG",9914]],
    GEOIDMODEL["ETRS89 to BI height (2)",ID["EPSG",9916]],
    GEOIDMODEL["ETRS89 to BI height (3)",ID["EPSG",9918]],
    ID["EPSG",9451]
]

PROJ.4

+vunits=m +no_defs +type=crs

Proj4js

How to add a projection to Proj4js? →

proj4.defs("EPSG:9451", "+vunits=m +no_defs +type=crs");

JSON

{
  "type": "CoordinateReferenceSystem",
  "code": 9451,
  "name": "BI height",
  "kind": "vertical",
  "area": "Europe - British Isles - UK and Ireland onshore, UKCS",
  "unit": "metre",
  "bbox": [
    49.75,
    -10.85,
    61.01,
    2.01
  ],
  "proj4": "+vunits=m +no_defs +type=crs"
}

PostGIS

How to add a projection to PostGIS? →

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (9451, 'EPSG', 9451, '+vunits=m +no_defs +type=crs', 'VERT_CS["BI height",VERT_DATUM["British Isles height ensemble",2005,AUTHORITY["EPSG","1288"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","9451"]]');

MapServer

How to add a projection to MapServer? →

PROJECTION
  "+vunits=m"
  "+no_defs"
  "+type=crs"
END

GeoServer

How to add a projection to GeoServer? →

9451=VERT_CS["BI height",VERT_DATUM["British Isles height ensemble",2005,AUTHORITY["EPSG","1288"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","9451"]]

Related Coordinate Systems

Available Transformations (3)

Transformation	Source → Target	Accuracy (m)
ETRS89 to BI height (2)	4937 → 9451	0.014
ETRS89 to BI height (1)	4937 → 9451	0.02
ETRS89 to BI height (3)	4937 → 9451	0.023

Frequently Asked Questions

How do I add EPSG:9451 to GeoServer?

Add the following definition to your GeoServer configuration:

9451=VERT_CS["BI height",VERT_DATUM["British Isles height ensemble",2005,AUTHORITY["EPSG","1288"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","9451"]]

Read the full GeoServer guide →

How do I add EPSG:9451 to PostGIS?

Add the following definition to your PostGIS configuration:

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (9451, 'EPSG', 9451, '+vunits=m +no_defs +type=crs', 'VERT_CS["BI height",VERT_DATUM["British Isles height ensemble",2005,AUTHORITY["EPSG","1288"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","9451"]]');

Read the full PostGIS guide →

How do I add EPSG:9451 to MapServer?

Add the following definition to your MapServer configuration:

PROJECTION
  "+vunits=m"
  "+no_defs"
  "+type=crs"
END

Read the full MapServer guide →

How do I use EPSG:9451 with Proj4js?

Add the following definition to your Proj4js configuration:

proj4.defs("EPSG:9451", "+vunits=m +no_defs +type=crs");

Read the full Proj4js guide →