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Method: Geographic3D to GravityRelatedHeight (gtx)
Grid Files: g2003u03.bin
Remarks: 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.
Information source: National Geodetic Survey, http://www.ngs.noaa.gov/GEOID/
Revision date: 2015-11-25
Unit: US survey foot
Geodetic CRS: NAD83
Datum: North American Datum 1983
Ellipsoid: GRS 1980
Prime meridian: Greenwich
Data source: EPSG
Information source: National Geodetic Survey http://www.ngs.noaa.gov/INFO/Policy/st_plane.html
Revision date: 2001-11-06
Scope: Engineering survey, topographic mapping.
Remarks: State law defines system in US survey feet. Federal definition is metric - see code 26967. For applications with an accuracy of better than 3 feet, replaced by NAD83(HARN) / SPCS.
Coordinate system: Cartesian 2D CS. Axes: easting, northing (X,Y). Orientations: east, north. UoM: ftUS.
&stroke=red&width=2&path=41.0,-95.0|49.37,-95.0|49.37,-77.99|41.0,-77.99|41.0,-95.0)
Center coordinates
1696284.57 5537587.93
Projected bounds:
-695914.03 4003725.21
4001841.56 7241308.77
WGS84 bounds:
-95.0 41.0
-77.99 49.37
Definition: OGC Well Known Text 2 (2019)
BOUNDCRS[ SOURCECRS[ 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]], 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",2240]]], 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 (3)", METHOD["Geographic3D to GravityRelatedHeight (gtx)", ID["EPSG",9665]], PARAMETERFILE["Geoid (height correction) model file","g2003u03.bin"], USAGE[ SCOPE["Derivation of approximate gravity-related heights from GNSS observations."], AREA["United States (USA) - CONUS north of 41°N and between 95°W and 78°W - Michigan and Wisconsin; Minnesota east of 95°W; Iowa north of 41°N and east of 95°W; Illinois, Indiana and Ohio north of 41°N; Pennsylvania north of 41°N and west of 78°W; New York west of 78°W."], BBOX[41,-95,49.37,-77.99]], ID["EPSG",10015], 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."]]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "BoundCRS", "source_crs": { "type": "ProjectedCRS", "name": "NAD83 / Georgia West (ftUS)", "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 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 } } ] }, "id": { "authority": "EPSG", "code": 2240 } }, "target_crs": { "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" } ] }, "id": { "authority": "EPSG", "code": 5703 } }, "transformation": { "name": "NAD83 to NAVD88 height (3)", "method": { "name": "Geographic3D to GravityRelatedHeight (gtx)", "id": { "authority": "EPSG", "code": 9665 } }, "parameters": [ { "name": "Geoid (height correction) model file", "value": "g2003u03.bin", "id": { "authority": "EPSG", "code": 8666 } } ], "id": { "authority": "EPSG", "code": 10015 } } }
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=tmerc +lat_0=30 +lon_0=-84.1666666666667 +k=0.9999 +x_0=699999.999898399 +y_0=0 +datum=NAD83 +units=us-ft +no_defs +type=crs"> <Layer srs="+proj=tmerc +lat_0=30 +lon_0=-84.1666666666667 +k=0.9999 +x_0=699999.999898399 +y_0=0 +datum=NAD83 +units=us-ft +no_defs +type=crs"> </Layer> </Map>
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