OSGB36 / British National Grid + BI height - EPSG:9920
Detailed Extent
WKT
HVCOORDSYS["OSGB36_British_National_Grid_and_BI_height",
PROJCS["British_National_Grid",
GEOGCS["GCS_OSGB_1936",
DATUM["D_OSGB_1936",
SPHEROID["Airy_1830", 6377563.396, 299.3249646]],
PRIMEM["Greenwich", 0.0],
UNIT["Degree", 0.0174532925199433]],
PROJECTION["Transverse_Mercator"],
PARAMETER["False_Easting", 400000.0],
PARAMETER["False_Northing", -100000.0],
PARAMETER["Central_Meridian", -2.0],
PARAMETER["Scale_Factor", 0.9996012717],
PARAMETER["Latitude_Of_Origin", 49.0],
UNIT["Meter", 1.0]],
VERTCS["BI_height",
VDATUM["British_Isles_height_ensemble"],
PARAMETER["Vertical_Shift", 0.0],
PARAMETER["Direction", 1.0],
UNIT["Meter", 1.0]]]
WKT2
COMPOUNDCRS["OSGB36_British_National_Grid_and_BI_height",
PROJCRS["British_National_Grid",
BASEGEOGCRS["GCS_OSGB_1936",
DATUM["D_OSGB_1936",
ELLIPSOID["Airy_1830", 6377563.396, 299.3249646]],
PRIMEM["Greenwich", 0.0],
CS[ellipsoidal, 2],
AXIS["Latitude (lat)", north,
ORDER[1]],
AXIS["Longitude (lon)", east,
ORDER[2]],
ANGLEUNIT["Degree", 0.0174532925199433]],
CONVERSION["Transverse_Mercator",
METHOD["Transverse_Mercator"],
PARAMETER["False_Easting", 400000.0],
PARAMETER["False_Northing", -100000.0],
PARAMETER["Central_Meridian", -2.0],
PARAMETER["Scale_Factor", 0.9996012717],
PARAMETER["Latitude_Of_Origin", 49.0]],
CS[Cartesian, 2],
AXIS["Easting (X)", east,
ORDER[1]],
AXIS["Northing (Y)", north,
ORDER[2]],
LENGTHUNIT["Meter", 1.0]],
VERTCRS["BI_height",
VDATUM["British_Isles_height_ensemble"],
CS[vertical, 1],
AXIS["Gravity-related height (H)", up,
LENGTHUNIT["Meter", 1.0]]],
ID["EPSG", "9920"]]
Data from @esri/proj-codes
{
"wkid": 9920,
"latestWkid": 9920,
"pcsWkid": 27700,
"gcsWkid": 4277,
"vcsWkid": 9451,
"macro": "PE_HVC_OSGB36_BRITISH_NATIONAL_GRID_BI_HEIGHT",
"name": "OSGB36_British_National_Grid_and_BI_height",
"wkt": "HVCOORDSYS[\"OSGB36_British_National_Grid_and_BI_height\",PROJCS[\"British_National_Grid\",GEOGCS[\"GCS_OSGB_1936\",DATUM[\"D_OSGB_1936\",SPHEROID[\"Airy_1830\",6377563.396,299.3249646]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",400000.0],PARAMETER[\"False_Northing\",-100000.0],PARAMETER[\"Central_Meridian\",-2.0],PARAMETER[\"Scale_Factor\",0.9996012717],PARAMETER[\"Latitude_Of_Origin\",49.0],UNIT[\"Meter\",1.0]],VERTCS[\"BI_height\",VDATUM[\"British_Isles_height_ensemble\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]]",
"wkt2": "COMPOUNDCRS[\"OSGB36_British_National_Grid_and_BI_height\",PROJCRS[\"British_National_Grid\",BASEGEOGCRS[\"GCS_OSGB_1936\",DATUM[\"D_OSGB_1936\",ELLIPSOID[\"Airy_1830\",6377563.396,299.3249646]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],CONVERSION[\"Transverse_Mercator\",METHOD[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",400000.0],PARAMETER[\"False_Northing\",-100000.0],PARAMETER[\"Central_Meridian\",-2.0],PARAMETER[\"Scale_Factor\",0.9996012717],PARAMETER[\"Latitude_Of_Origin\",49.0]],CS[Cartesian,2],AXIS[\"Easting (X)\",east,ORDER[1]],AXIS[\"Northing (Y)\",north,ORDER[2]],LENGTHUNIT[\"Meter\",1.0]],VERTCRS[\"BI_height\",VDATUM[\"British_Isles_height_ensemble\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]]],ID[\"EPSG\",\"9920\"]]",
"description": "OSGB36 / British National Grid + BI height",
"authority": "EPSG",
"version": "10.049(13.2.0)",
"deprecated": "no",
"areaname": "UK - Britain and UKCS 49~45'N to 61~N, 9~W to 2~E",
"extent": {
"slat": 49.75,
"nlat": 61.01,
"llon": -9.01,
"rlon": 2.01
}
}