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Geodetic CRS: MRH21 Grid + ODN height
Data source: EPSG
Information source: Network Rail.
Revision date: 2021-11-04
Scope: Engineering survey and topographic mapping for railway applications.
&stroke=red&width=2&path=51.35,-3.27|53.26,-3.27|53.26,-0.36|51.35,-0.36|51.35,-3.27)
Center coordinates
226263.83 266307.76
Projected bounds:
124877.15 160050.58
327606.92 373590.62
WGS84 bounds:
-3.27 51.35
-0.36 53.26
Definition: OGC Well Known Text
COMPD_CS["MRH21 Grid + ODN height", PROJCS["MRH21 Grid", GEOGCS["MRH21-IRF", DATUM["MRH21_Intermediate_Reference_Frame", SPHEROID["GRS 1980",6378137,298.257222101, AUTHORITY["EPSG","7019"]], AUTHORITY["EPSG","1314"]], PRIMEM["Greenwich",0, AUTHORITY["EPSG","8901"]], UNIT["degree",0.0174532925199433, AUTHORITY["EPSG","9122"]], AUTHORITY["EPSG","9866"]], PROJECTION["Transverse_Mercator"], PARAMETER["latitude_of_origin",52.3], PARAMETER["central_meridian",-1.8], PARAMETER["scale_factor",1], PARAMETER["false_easting",227286.9881], PARAMETER["false_northing",265751.2874], UNIT["metre",1, AUTHORITY["EPSG","9001"]], AXIS["Easting",EAST], AXIS["Northing",NORTH], AUTHORITY["EPSG","9869"]], VERT_CS["ODN height", VERT_DATUM["Ordnance Datum Newlyn",2005, AUTHORITY["EPSG","5101"]], UNIT["metre",1, AUTHORITY["EPSG","9001"]], AXIS["Gravity-related height",UP], AUTHORITY["EPSG","5701"]], AUTHORITY["EPSG","9870"]]
Definition: OGC Well Known Text 2 (2019)
COMPOUNDCRS["MRH21 Grid + ODN height", PROJCRS["MRH21 Grid", BASEGEOGCRS["MRH21-IRF", DATUM["MRH21 Intermediate Reference Frame", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], ID["EPSG",9866]], CONVERSION["MRH21-TM", METHOD["Transverse Mercator", ID["EPSG",9807]], PARAMETER["Latitude of natural origin",52.3, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8801]], PARAMETER["Longitude of natural origin",-1.8, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8802]], PARAMETER["Scale factor at natural origin",1, SCALEUNIT["unity",1], ID["EPSG",8805]], PARAMETER["False easting",227286.9881, LENGTHUNIT["metre",1], ID["EPSG",8806]], PARAMETER["False northing",265751.2874, LENGTHUNIT["metre",1], ID["EPSG",8807]]], CS[Cartesian,2], AXIS["(E)",east, ORDER[1], LENGTHUNIT["metre",1]], AXIS["(N)",north, ORDER[2], LENGTHUNIT["metre",1]]], VERTCRS["ODN height", VDATUM["Ordnance Datum Newlyn"], CS[vertical,1], AXIS["gravity-related height (H)",up, LENGTHUNIT["metre",1]]], USAGE[ SCOPE["Engineering survey and topographic mapping for railway applications."], AREA["United Kingdom (UK) - on or related to Midland Rail Hub, covering routes through Cardiff, Bristol, Gloucester, Derby, Birmingham, Leicester, and Lincoln."], BBOX[51.35,-3.27,53.26,-0.36]], ID["EPSG",9870]]
Definition: ESRI Well Known Text
PROJCS["MRH21_Grid", GEOGCS["GCS_MRH21-IRF", DATUM["MRH21_Intermediate_Reference_Frame", SPHEROID["GRS_1980",6378137.0,298.257222101]], PRIMEM["Greenwich",0.0], UNIT["Degree",0.0174532925199433]], PROJECTION["Transverse_Mercator"], PARAMETER["False_Easting",227286.9881], PARAMETER["False_Northing",265751.2874], PARAMETER["Central_Meridian",-1.8], PARAMETER["Scale_Factor",1.0], PARAMETER["Latitude_Of_Origin",52.3], UNIT["Meter",1.0]], VERTCS["Newlyn", VDATUM["Ordnance_Datum_Newlyn"], PARAMETER["Vertical_Shift",0.0], PARAMETER["Direction",1.0], UNIT["Meter",1.0]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "CompoundCRS", "name": "MRH21 Grid + ODN height", "components": [ { "type": "ProjectedCRS", "name": "MRH21 Grid", "base_crs": { "name": "MRH21-IRF", "datum": { "type": "GeodeticReferenceFrame", "name": "MRH21 Intermediate Reference Frame", "ellipsoid": { "name": "GRS 1980", "semi_major_axis": 6378137, "inverse_flattening": 298.257222101 } }, "coordinate_system": { "subtype": "ellipsoidal", "axis": [ { "name": "Geodetic latitude", "abbreviation": "Lat", "direction": "north", "unit": "degree" }, { "name": "Geodetic longitude", "abbreviation": "Lon", "direction": "east", "unit": "degree" } ] }, "id": { "authority": "EPSG", "code": 9866 } }, "conversion": { "name": "MRH21-TM", "method": { "name": "Transverse Mercator", "id": { "authority": "EPSG", "code": 9807 } }, "parameters": [ { "name": "Latitude of natural origin", "value": 52.3, "unit": "degree", "id": { "authority": "EPSG", "code": 8801 } }, { "name": "Longitude of natural origin", "value": -1.8, "unit": "degree", "id": { "authority": "EPSG", "code": 8802 } }, { "name": "Scale factor at natural origin", "value": 1, "unit": "unity", "id": { "authority": "EPSG", "code": 8805 } }, { "name": "False easting", "value": 227286.9881, "unit": "metre", "id": { "authority": "EPSG", "code": 8806 } }, { "name": "False northing", "value": 265751.2874, "unit": "metre", "id": { "authority": "EPSG", "code": 8807 } } ] }, "coordinate_system": { "subtype": "Cartesian", "axis": [ { "name": "Easting", "abbreviation": "E", "direction": "east", "unit": "metre" }, { "name": "Northing", "abbreviation": "N", "direction": "north", "unit": "metre" } ] } }, { "type": "VerticalCRS", "name": "ODN height", "datum": { "type": "VerticalReferenceFrame", "name": "Ordnance Datum Newlyn" }, "coordinate_system": { "subtype": "vertical", "axis": [ { "name": "Gravity-related height", "abbreviation": "H", "direction": "up", "unit": "metre" } ] } } ], "scope": "Engineering survey and topographic mapping for railway applications.", "area": "United Kingdom (UK) - on or related to Midland Rail Hub, covering routes through Cardiff, Bristol, Gloucester, Derby, Birmingham, Leicester, and Lincoln.", "bbox": { "south_latitude": 51.35, "west_longitude": -3.27, "north_latitude": 53.26, "east_longitude": -0.36 }, "id": { "authority": "EPSG", "code": 9870 } }
Definition: GeoServer
9870=COMPD_CS["MRH21 Grid + ODN height",PROJCS["MRH21 Grid",GEOGCS["MRH21-IRF",DATUM["MRH21_Intermediate_Reference_Frame",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","1314"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","9866"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",52.3],PARAMETER["central_meridian",-1.8],PARAMETER["scale_factor",1],PARAMETER["false_easting",227286.9881],PARAMETER["false_northing",265751.2874],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","9869"]],VERT_CS["ODN height",VERT_DATUM["Ordnance Datum Newlyn",2005,AUTHORITY["EPSG","5101"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5701"]],AUTHORITY["EPSG","9870"]]
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=tmerc +lat_0=52.3 +lon_0=-1.8 +k=1 +x_0=227286.9881 +y_0=265751.2874 +ellps=GRS80 +units=m +vunits=m +no_defs +type=crs"> <Layer srs="+proj=tmerc +lat_0=52.3 +lon_0=-1.8 +k=1 +x_0=227286.9881 +y_0=265751.2874 +ellps=GRS80 +units=m +vunits=m +no_defs +type=crs"> </Layer> </Map>
Definition: SQL (PostGIS)
INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 9870, 'EPSG', 9870, '+proj=tmerc +lat_0=52.3 +lon_0=-1.8 +k=1 +x_0=227286.9881 +y_0=265751.2874 +ellps=GRS80 +units=m +vunits=m +no_defs +type=crs', 'COMPD_CS["MRH21 Grid + ODN height",PROJCS["MRH21 Grid",GEOGCS["MRH21-IRF",DATUM["MRH21_Intermediate_Reference_Frame",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","1314"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","9866"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",52.3],PARAMETER["central_meridian",-1.8],PARAMETER["scale_factor",1],PARAMETER["false_easting",227286.9881],PARAMETER["false_northing",265751.2874],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","9869"]],VERT_CS["ODN height",VERT_DATUM["Ordnance Datum Newlyn",2005,AUTHORITY["EPSG","5101"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5701"]],AUTHORITY["EPSG","9870"]]');
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