{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"VerticalCRS","name":"NAVD88 depth (ftUS)","datum":{"type":"VerticalReferenceFrame","name":"North American Vertical Datum 1988"},"coordinate_system":{"subtype":"vertical","axis":[{"name":"Depth","abbreviation":"D","direction":"down","unit":{"type":"LinearUnit","name":"US survey foot","conversion_factor":0.304800609601219}}]},"scope":"Geodesy, engineering survey.","area":"United States (USA) - CONUS and Alaska - onshore - Alabama; Alaska mainland; 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":{"south_latitude":24.41,"west_longitude":-168.26,"north_latitude":71.4,"east_longitude":-66.91},"id":{"authority":"EPSG","code":6358}}