COMPOUNDCRS["SMITB20 Grid + ODN height",PROJCRS["SMITB20 Grid",BASEGEOGCRS["SMITB20-IRF",DATUM["SMITB20 Intermediate Reference Frame",ELLIPSOID["GRS 1980",6378137,298.257222101,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],ID["EPSG",10272]],CONVERSION["SMITB20-TM",METHOD["Transverse Mercator",ID["EPSG",9807]],PARAMETER["Latitude of natural origin",50.75,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",-3.85,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["Scale factor at natural origin",1,SCALEUNIT["unity",1],ID["EPSG",8805]],PARAMETER["False easting",110693.666,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",102089.2943,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 the rail route from Okehampton to Penstone."],BBOX[50.65,-4.1,50.85,-3.6]],ID["EPSG",10276]]