metre
Engineering survey, topographic mapping.
None
United States (USA) - Alabama east of approximately 86°37'W - counties Barbour; Bullock; Calhoun; Chambers; Cherokee; Clay; Cleburne; Coffee; Coosa; Covington; Crenshaw; Dale; De Kalb; Elmore; Etowah; Geneva; Henry; Houston; Jackson; Lee; Macon; Madison; Marshall; Montgomery; Pike; Randolph; Russell; StClair; Talladega; Tallapoosa.
Data Source: EPSG v11.016 2024-08-31
Datum: North American Datum 1983
Coordinate System: Undefined
Projection: Undefined
Geodetic CRS: Undefined
COMPOUNDCRS["NAD83 / Alabama East + NAVD88 height",
PROJCRS["NAD83 / Alabama East",
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 Alabama East zone (meter)",
METHOD["Transverse Mercator",
ID["EPSG",9807]],
PARAMETER["Latitude of natural origin",30.5,
ANGLEUNIT["degree",0.0174532925199433],
ID["EPSG",8801]],
PARAMETER["Longitude of natural origin",-85.8333333333333,
ANGLEUNIT["degree",0.0174532925199433],
ID["EPSG",8802]],
PARAMETER["Scale factor at natural origin",0.99996,
SCALEUNIT["unity",1],
ID["EPSG",8805]],
PARAMETER["False easting",200000,
LENGTHUNIT["metre",1],
ID["EPSG",8806]],
PARAMETER["False northing",0,
LENGTHUNIT["metre",1],
ID["EPSG",8807]]],
CS[Cartesian,2],
AXIS["easting (X)",east,
ORDER[1],
LENGTHUNIT["metre",1]],
AXIS["northing (Y)",north,
ORDER[2],
LENGTHUNIT["metre",1]]],
VERTCRS["NAVD88 height",
VDATUM["North American Vertical Datum 1988"],
CS[vertical,1],
AXIS["gravity-related height (H)",up,
LENGTHUNIT["metre",1]]],
USAGE[
SCOPE["Engineering survey, topographic mapping."],
AREA["United States (USA) - Alabama east of approximately 86°37'W - counties Barbour; Bullock; Calhoun; Chambers; Cherokee; Clay; Cleburne; Coffee; Coosa; Covington; Crenshaw; Dale; De Kalb; Elmore; Etowah; Geneva; Henry; Houston; Jackson; Lee; Macon; Madison; Marshall; Montgomery; Pike; Randolph; Russell; StClair; Talladega; Tallapoosa."],
BBOX[30.99,-86.79,35,-84.89]],
ID["EPSG",8801]]
{
"$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
"type": "CompoundCRS",
"name": "NAD83 / Alabama East + NAVD88 height",
"components": [
{
"type": "ProjectedCRS",
"name": "NAD83 / Alabama East",
"base_crs": {
"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
}
},
"conversion": {
"name": "SPCS83 Alabama East zone (meter)",
"method": {
"name": "Transverse Mercator",
"id": {
"authority": "EPSG",
"code": 9807
}
},
"parameters": [
{
"name": "Latitude of natural origin",
"value": 30.5,
"unit": "degree",
"id": {
"authority": "EPSG",
"code": 8801
}
},
{
"name": "Longitude of natural origin",
"value": -85.8333333333333,
"unit": "degree",
"id": {
"authority": "EPSG",
"code": 8802
}
},
{
"name": "Scale factor at natural origin",
"value": 0.99996,
"unit": "unity",
"id": {
"authority": "EPSG",
"code": 8805
}
},
{
"name": "False easting",
"value": 200000,
"unit": "metre",
"id": {
"authority": "EPSG",
"code": 8806
}
},
{
"name": "False northing",
"value": 0,
"unit": "metre",
"id": {
"authority": "EPSG",
"code": 8807
}
}
]
},
"coordinate_system": {
"subtype": "Cartesian",
"axis": [
{
"name": "Easting",
"abbreviation": "X",
"direction": "east",
"unit": "metre"
},
{
"name": "Northing",
"abbreviation": "Y",
"direction": "north",
"unit": "metre"
}
]
}
},
{
"type": "VerticalCRS",
"name": "NAVD88 height",
"datum": {
"type": "VerticalReferenceFrame",
"name": "North American Vertical Datum 1988"
},
"coordinate_system": {
"subtype": "vertical",
"axis": [
{
"name": "Gravity-related height",
"abbreviation": "H",
"direction": "up",
"unit": "metre"
}
]
}
}
],
"scope": "Engineering survey, topographic mapping.",
"area": "United States (USA) - Alabama east of approximately 86°37'W - counties Barbour; Bullock; Calhoun; Chambers; Cherokee; Clay; Cleburne; Coffee; Coosa; Covington; Crenshaw; Dale; De Kalb; Elmore; Etowah; Geneva; Henry; Houston; Jackson; Lee; Macon; Madison; Marshall; Montgomery; Pike; Randolph; Russell; StClair; Talladega; Tallapoosa.",
"bbox": {
"south_latitude": 30.99,
"west_longitude": -86.79,
"north_latitude": 35,
"east_longitude": -84.89
},
"id": {
"authority": "EPSG",
"code": 8801
}
}
{'crs_wkt': 'COMPOUNDCRS["NAD83 / Alabama East + NAVD88 height",PROJCRS["NAD83 '
'/ Alabama East",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 '
'Alabama East zone (meter)",METHOD["Transverse '
'Mercator",ID["EPSG",9807]],PARAMETER["Latitude of natural '
'origin",30.5,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude '
'of natural '
'origin",-85.8333333333333,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["Scale '
'factor at natural '
'origin",0.99996,SCALEUNIT["unity",1],ID["EPSG",8805]],PARAMETER["False '
'easting",200000,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False '
'northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["easting '
'(X)",east,ORDER[1],LENGTHUNIT["metre",1]],AXIS["northing '
'(Y)",north,ORDER[2],LENGTHUNIT["metre",1]]],VERTCRS["NAVD88 '
'height",VDATUM["North American Vertical Datum '
'1988"],CS[vertical,1],AXIS["gravity-related height '
'(H)",up,LENGTHUNIT["metre",1]]],USAGE[SCOPE["Engineering survey, '
'topographic mapping."],AREA["United States (USA) - Alabama east '
"of approximately 86°37'W - counties Barbour; Bullock; Calhoun; "
'Chambers; Cherokee; Clay; Cleburne; Coffee; Coosa; Covington; '
'Crenshaw; Dale; De Kalb; Elmore; Etowah; Geneva; Henry; Houston; '
'Jackson; Lee; Macon; Madison; Marshall; Montgomery; Pike; '
'Randolph; Russell; StClair; Talladega; '
'Tallapoosa."],BBOX[30.99,-86.79,35,-84.89]],ID["EPSG",8801]]',
'false_easting': 200000.0,
'false_northing': 0.0,
'geographic_crs_name': 'NAD83',
'geopotential_datum_name': 'North American Vertical Datum 1988',
'grid_mapping_name': 'transverse_mercator',
'horizontal_datum_name': 'North American Datum 1983',
'inverse_flattening': 298.257222101,
'latitude_of_projection_origin': 30.5,
'longitude_of_central_meridian': -85.8333333333333,
'longitude_of_prime_meridian': 0.0,
'prime_meridian_name': 'Greenwich',
'projected_crs_name': 'NAD83 / Alabama East',
'reference_ellipsoid_name': 'GRS 1980',
'scale_factor_at_central_meridian': 0.99996,
'semi_major_axis': 6378137.0,
'semi_minor_axis': 6356752.314140356}