BOUNDCRS[SOURCECRS[PROJCRS["NAD83 / BLM 8N (ftUS)",BASEGEOGCRS["NAD83",DATUM["North American Datum 1983",ELLIPSOID["GRS 1980",6378137,298.257222101,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],ID["EPSG",4269]],CONVERSION["BLM zone 8N (US survey foot)",METHOD["Transverse Mercator",ID["EPSG",9807]],PARAMETER["Latitude of natural origin",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",-135,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["Scale factor at natural origin",0.9996,SCALEUNIT["unity",1],ID["EPSG",8805]],PARAMETER["False easting",1640416.67,LENGTHUNIT["US survey foot",0.304800609601219],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["US survey foot",0.304800609601219],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["easting (X)",east,ORDER[1],LENGTHUNIT["US survey foot",0.304800609601219]],AXIS["northing (Y)",north,ORDER[2],LENGTHUNIT["US survey foot",0.304800609601219]],USAGE[SCOPE["No official usage."],AREA["United States (USA) - between 138°W and 132°W onshore and offshore - Alaska."],BBOX[53.6,-138,73.04,-131.99]],ID["EPSG",4428]]],TARGETCRS[VERTCRS["NAVD88 height",VDATUM["North American Vertical Datum 1988"],CS[vertical,1],AXIS["gravity-related height (H)",up,LENGTHUNIT["metre",1]],USAGE[SCOPE["Geodesy, engineering survey, topographic mapping."],AREA["Mexico - onshore. United States (USA) - CONUS and Alaska - onshore - Alabama; Alaska; Arizona; Arkansas; California; Colorado; Connecticut; Delaware; Florida; Georgia; Idaho; Illinois; Indiana; Iowa; Kansas; Kentucky; Louisiana; Maine; Maryland; Massachusetts; Michigan; Minnesota; Mississippi; Missouri; Montana; Nebraska; Nevada; New Hampshire; New Jersey; New Mexico; New York; North Carolina; North Dakota; Ohio; Oklahoma; Oregon; Pennsylvania; Rhode Island; South Carolina; South Dakota; Tennessee; Texas; Utah; Vermont; Virginia; Washington; West Virginia; Wisconsin; Wyoming."],BBOX[14.51,172.42,71.4,-66.91]],ID["EPSG",5703]]],ABRIDGEDTRANSFORMATION["NAD83 to NAVD88 height (6)",METHOD["Geographic3D to GravityRelatedHeight (gtx)",ID["EPSG",9665]],PARAMETERFILE["Geoid (height correction) model file","g2003u06.bin"],USAGE[SCOPE["Derivation of approximate gravity-related heights from GNSS observations."],AREA["United States (USA) - CONUS onshore south of 41°N and between 112°W and 95°W - Colorado and New Mexico; Arizona east of 112°W; Utah south of 41°N and east of 112°W; Nebraska south of 41°N; Iowa south of 41°N and west of 95°W; Kansas, Missouri, Oklahoma and Texas west of 95°W."],BBOX[25.83,-112,41.01,-94.99]],ID["EPSG",10018],REMARK["Uses Geoid03 hybrid model. See information source for further information. Note: Source CRS is 2D, used in this application of the method as a pseudo-3D CRS."]]]