EPSG:8729

COMPD_CS["NAD83 / Georgia West (ftUS) + NAVD88 height (ftUS)",
    PROJCS["NAD83 / Georgia West (ftUS)",
        GEOGCS["NAD83",
            DATUM["North_American_Datum_1983",
                SPHEROID["GRS 1980",6378137,298.257222101,
                    AUTHORITY["EPSG","7019"]],
                AUTHORITY["EPSG","6269"]],
            PRIMEM["Greenwich",0,
                AUTHORITY["EPSG","8901"]],
            UNIT["degree",0.0174532925199433,
                AUTHORITY["EPSG","9122"]],
            AUTHORITY["EPSG","4269"]],
        PROJECTION["Transverse_Mercator"],
        PARAMETER["latitude_of_origin",30],
        PARAMETER["central_meridian",-84.1666666666667],
        PARAMETER["scale_factor",0.9999],
        PARAMETER["false_easting",2296583.333],
        PARAMETER["false_northing",0],
        UNIT["US survey foot",0.304800609601219,
            AUTHORITY["EPSG","9003"]],
        AXIS["Easting",EAST],
        AXIS["Northing",NORTH],
        AUTHORITY["EPSG","2240"]],
    VERT_CS["NAVD88 height (ftUS)",
        VERT_DATUM["North American Vertical Datum 1988",2005,
            AUTHORITY["EPSG","5103"]],
        UNIT["US survey foot",0.304800609601219,
            AUTHORITY["EPSG","9003"]],
        AXIS["Gravity-related height",UP],
        AUTHORITY["EPSG","6360"]],
    AUTHORITY["EPSG","8729"]]

COMPOUNDCRS["NAD83 / Georgia West (ftUS) + NAVD88 height (ftUS)",
    PROJCRS["NAD83 / Georgia West (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["SPCS83 Georgia West zone (US survey foot)",
            METHOD["Transverse Mercator",
                ID["EPSG",9807]],
            PARAMETER["Latitude of natural origin",30,
                ANGLEUNIT["degree",0.0174532925199433],
                ID["EPSG",8801]],
            PARAMETER["Longitude of natural origin",-84.1666666666667,
                ANGLEUNIT["degree",0.0174532925199433],
                ID["EPSG",8802]],
            PARAMETER["Scale factor at natural origin",0.9999,
                SCALEUNIT["unity",1],
                ID["EPSG",8805]],
            PARAMETER["False easting",2296583.333,
                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]]],
    VERTCRS["NAVD88 height (ftUS)",
        VDATUM["North American Vertical Datum 1988"],
        CS[vertical,1],
            AXIS["gravity-related height (H)",up,
                LENGTHUNIT["US survey foot",0.304800609601219]]],
    USAGE[
        SCOPE["Engineering survey, topographic mapping."],
        AREA["United States (USA) - Georgia - counties of Baker; Banks; Barrow; Bartow; Ben Hill; Berrien; Bibb; Bleckley; Brooks; Butts; Calhoun; Carroll; Catoosa; Chattahoochee; Chattooga; Cherokee; Clarke; Clay; Clayton; Cobb; Colquitt; Cook; Coweta; Crawford; Crisp; Dade; Dawson; De Kalb; Decatur; Dooly; Dougherty; Douglas; Early; Fannin; Fayette; Floyd; Forsyth; Fulton; Gilmer; Gordon; Grady; Gwinnett; Habersham; Hall; Haralson; Harris; Heard; Henry; Houston; Irwin; Jackson; Jasper; Jones; Lamar; Lee; Lowndes; Lumpkin; Macon; Marion; Meriwether; Miller; Mitchell; Monroe; Morgan; Murray; Muscogee; Newton; Oconee; Paulding; Peach; Pickens; Pike; Polk; Pulaski; Putnam; Quitman; Rabun; Randolph; Rockdale; Schley; Seminole; Spalding; Stewart; Sumter; Talbot; Taylor; Terrell; Thomas; Tift; Towns; Troup; Turner; Twiggs; Union; Upson; Walker; Walton; Webster; White; Whitfield; Wilcox; Worth."],
        BBOX[30.62,-85.61,35.01,-82.99]],
    ID["EPSG",8729]]

PROJCS["NAD_1983_StatePlane_Georgia_West_FIPS_1002_Feet",
    GEOGCS["GCS_North_American_1983",
        DATUM["D_North_American_1983",
            SPHEROID["GRS_1980",6378137.0,298.257222101]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["False_Easting",2296583.333],
    PARAMETER["False_Northing",0.0],
    PARAMETER["Central_Meridian",-84.1666666666667],
    PARAMETER["Scale_Factor",0.9999],
    PARAMETER["Latitude_Of_Origin",30.0],
    UNIT["US survey foot",0.304800609601219]],
VERTCS["NAVD88_height_(ftUS)",
    VDATUM["North_American_Vertical_Datum_1988"],
    PARAMETER["Vertical_Shift",0.0],
    PARAMETER["Direction",1.0],
    UNIT["US survey foot",0.304800609601219]]

proj4.defs("EPSG:8729","+proj=tmerc +lat_0=30 +lon_0=-84.1666666666667 +k=0.9999 +x_0=699999.9998984 +y_0=0 +datum=NAD83 +units=us-ft +vunits=us-ft +no_defs +type=crs");

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "CompoundCRS",
    "name": "NAD83 / Georgia West (ftUS) + NAVD88 height (ftUS)",
    "components": [
        {
            "type": "ProjectedCRS",
            "name": "NAD83 / Georgia West (ftUS)",
            "base_crs": {
                "type": "GeographicCRS",
                "name": "NAD83",
                "datum": {
                    "type": "GeodeticReferenceFrame",
                    "name": "North American Datum 1983",
                    "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": 4269
                },
                "remarks": "Longitude is POSITIVE EAST. The adjustment included connections to Greenland and Mexico but the system was not adopted there. For applications with an accuracy of better than 1m replaced by NAD83(HARN) in the US and PRVI and by NAD83(CSRS) in Canada."
            },
            "conversion": {
                "name": "SPCS83 Georgia West zone (US survey foot)",
                "method": {
                    "name": "Transverse Mercator",
                    "id": {
                        "authority": "EPSG",
                        "code": 9807
                    }
                },
                "parameters": [
                    {
                        "name": "Latitude of natural origin",
                        "value": 30,
                        "unit": "degree",
                        "id": {
                            "authority": "EPSG",
                            "code": 8801
                        }
                    },
                    {
                        "name": "Longitude of natural origin",
                        "value": -84.1666666666667,
                        "unit": "degree",
                        "id": {
                            "authority": "EPSG",
                            "code": 8802
                        }
                    },
                    {
                        "name": "Scale factor at natural origin",
                        "value": 0.9999,
                        "unit": "unity",
                        "id": {
                            "authority": "EPSG",
                            "code": 8805
                        }
                    },
                    {
                        "name": "False easting",
                        "value": 2296583.333,
                        "unit": {
                            "type": "LinearUnit",
                            "name": "US survey foot",
                            "conversion_factor": 0.304800609601219
                        },
                        "id": {
                            "authority": "EPSG",
                            "code": 8806
                        }
                    },
                    {
                        "name": "False northing",
                        "value": 0,
                        "unit": {
                            "type": "LinearUnit",
                            "name": "US survey foot",
                            "conversion_factor": 0.304800609601219
                        },
                        "id": {
                            "authority": "EPSG",
                            "code": 8807
                        }
                    }
                ]
            },
            "coordinate_system": {
                "subtype": "Cartesian",
                "axis": [
                    {
                        "name": "Easting",
                        "abbreviation": "X",
                        "direction": "east",
                        "unit": {
                            "type": "LinearUnit",
                            "name": "US survey foot",
                            "conversion_factor": 0.304800609601219
                        }
                    },
                    {
                        "name": "Northing",
                        "abbreviation": "Y",
                        "direction": "north",
                        "unit": {
                            "type": "LinearUnit",
                            "name": "US survey foot",
                            "conversion_factor": 0.304800609601219
                        }
                    }
                ]
            }
        },
        {
            "type": "VerticalCRS",
            "name": "NAVD88 height (ftUS)",
            "datum": {
                "type": "VerticalReferenceFrame",
                "name": "North American Vertical Datum 1988"
            },
            "coordinate_system": {
                "subtype": "vertical",
                "axis": [
                    {
                        "name": "Gravity-related height",
                        "abbreviation": "H",
                        "direction": "up",
                        "unit": {
                            "type": "LinearUnit",
                            "name": "US survey foot",
                            "conversion_factor": 0.304800609601219
                        }
                    }
                ]
            }
        }
    ],
    "scope": "Engineering survey, topographic mapping.",
    "area": "United States (USA) - Georgia - counties of Baker; Banks; Barrow; Bartow; Ben Hill; Berrien; Bibb; Bleckley; Brooks; Butts; Calhoun; Carroll; Catoosa; Chattahoochee; Chattooga; Cherokee; Clarke; Clay; Clayton; Cobb; Colquitt; Cook; Coweta; Crawford; Crisp; Dade; Dawson; De Kalb; Decatur; Dooly; Dougherty; Douglas; Early; Fannin; Fayette; Floyd; Forsyth; Fulton; Gilmer; Gordon; Grady; Gwinnett; Habersham; Hall; Haralson; Harris; Heard; Henry; Houston; Irwin; Jackson; Jasper; Jones; Lamar; Lee; Lowndes; Lumpkin; Macon; Marion; Meriwether; Miller; Mitchell; Monroe; Morgan; Murray; Muscogee; Newton; Oconee; Paulding; Peach; Pickens; Pike; Polk; Pulaski; Putnam; Quitman; Rabun; Randolph; Rockdale; Schley; Seminole; Spalding; Stewart; Sumter; Talbot; Taylor; Terrell; Thomas; Tift; Towns; Troup; Turner; Twiggs; Union; Upson; Walker; Walton; Webster; White; Whitfield; Wilcox; Worth.",
    "bbox": {
        "south_latitude": 30.62,
        "west_longitude": -85.61,
        "north_latitude": 35.01,
        "east_longitude": -82.99
    },
    "id": {
        "authority": "EPSG",
        "code": 8729
    }
}

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=tmerc +lat_0=30 +lon_0=-84.1666666666667 +k=0.9999 +x_0=699999.9998984 +y_0=0 +datum=NAD83 +units=us-ft +vunits=us-ft +no_defs +type=crs">
	<Layer srs="+proj=tmerc +lat_0=30 +lon_0=-84.1666666666667 +k=0.9999 +x_0=699999.9998984 +y_0=0 +datum=NAD83 +units=us-ft +vunits=us-ft +no_defs +type=crs">
	</Layer>
</Map>

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 8729, 'EPSG', 8729, '+proj=tmerc +lat_0=30 +lon_0=-84.1666666666667 +k=0.9999 +x_0=699999.9998984 +y_0=0 +datum=NAD83 +units=us-ft +vunits=us-ft +no_defs +type=crs', 'COMPD_CS["NAD83 / Georgia West (ftUS) + NAVD88 height (ftUS)",PROJCS["NAD83 / Georgia West (ftUS)",GEOGCS["NAD83",DATUM["North_American_Datum_1983",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","6269"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4269"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",30],PARAMETER["central_meridian",-84.1666666666667],PARAMETER["scale_factor",0.9999],PARAMETER["false_easting",2296583.333],PARAMETER["false_northing",0],UNIT["US survey foot",0.304800609601219,AUTHORITY["EPSG","9003"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","2240"]],VERT_CS["NAVD88 height (ftUS)",VERT_DATUM["North American Vertical Datum 1988",2005,AUTHORITY["EPSG","5103"]],UNIT["US survey foot",0.304800609601219,AUTHORITY["EPSG","9003"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","6360"]],AUTHORITY["EPSG","8729"]]');