EPSG:26720

NAD27 / UTM zone 20N

Available transformations
to EPSG:4326
EPSG:4326 - WGS 84

Selected transformation

Grid Files: conus.las conus.los

Remarks:

Information source: Both transformations from US National Geodetic Survey.

Revision date: 1999-10-20

Attributes

Unit: metre

Geodetic CRS: NAD27

Datum: North American Datum 1927

Ellipsoid: Clarke 1866

Prime meridian: Greenwich

Data source: EPSG

Revision date: 1995-06-02

Scope: Engineering survey, topographic mapping.

Remarks: In Quebec replaced by NAD27(CGQ77) / UTM zone 20N (code 2034).

Area of use: North America - between 66°W and 60°W - onshore and offshore. Canada - New Brunswick; Labrador; Nova Scotia; Nunavut; Prince Edward Island; Quebec. United States (USA) offshore Atlantic.

Coordinate system: Cartesian 2D CS. Axes: easting, northing (E,N). Orientations: east, north. UoM: m.

Covered area powered by MapTiler MapTiler logo
SimpleMap

Center coordinates
inf inf

Projected bounds:
-4163037.76 4440089.95
304706.63 7868203.39

WGS84 bounds:
-129.17 23.81
-65.69 49.38

United States (USA) - CONUS including EEZ - onshore and offshore - Alabama; 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. US Gulf of Mexico (GoM) OCS.
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Definition: OGC Well Known Text 2 (2019)

BOUNDCRS[
    SOURCECRS[
        BOUNDCRS[
            SOURCECRS[
                PROJCRS["NAD27 / UTM zone 20N",
                    BASEGEOGCRS["NAD27",
                        DATUM["North American Datum 1927",
                            ELLIPSOID["Clarke 1866",6378206.4,294.978698213898,
                                LENGTHUNIT["metre",1]]],
                        PRIMEM["Greenwich",0,
                            ANGLEUNIT["degree",0.0174532925199433]],
                        ID["EPSG",4267]],
                    CONVERSION["UTM zone 20N",
                        METHOD["Transverse Mercator",
                            ID["EPSG",9807]],
                        PARAMETER["Latitude of natural origin",0,
                            ANGLEUNIT["degree",0.0174532925199433],
                            ID["EPSG",8801]],
                        PARAMETER["Longitude of natural origin",-63,
                            ANGLEUNIT["degree",0.0174532925199433],
                            ID["EPSG",8802]],
                        PARAMETER["Scale factor at natural origin",0.9996,
                            SCALEUNIT["unity",1],
                            ID["EPSG",8805]],
                        PARAMETER["False easting",500000,
                            LENGTHUNIT["metre",1],
                            ID["EPSG",8806]],
                        PARAMETER["False northing",0,
                            LENGTHUNIT["metre",1],
                            ID["EPSG",8807]]],
                    CS[Cartesian,2],
                        AXIS["(E)",east,
                            ORDER[1],
                            LENGTHUNIT["metre",1]],
                        AXIS["(N)",north,
                            ORDER[2],
                            LENGTHUNIT["metre",1]],
                    ID["EPSG",26720]]],
            TARGETCRS[
                GEOGCRS["NAD83",
                    DATUM["North American Datum 1983",
                        ELLIPSOID["GRS 1980",6378137,298.257222101,
                            LENGTHUNIT["metre",1]]],
                    PRIMEM["Greenwich",0,
                        ANGLEUNIT["degree",0.0174532925199433]],
                    CS[ellipsoidal,2],
                        AXIS["geodetic latitude (Lat)",north,
                            ORDER[1],
                            ANGLEUNIT["degree",0.0174532925199433]],
                        AXIS["geodetic longitude (Lon)",east,
                            ORDER[2],
                            ANGLEUNIT["degree",0.0174532925199433]],
                    ID["EPSG",4269]]],
            ABRIDGEDTRANSFORMATION["NAD27 to NAD83 (1)",
                METHOD["NADCON",
                    ID["EPSG",9613]],
                PARAMETERFILE["Latitude difference file","conus.las"],
                PARAMETERFILE["Longitude difference file","conus.los"],
                ID["EPSG",1241]]]],
    TARGETCRS[
        GEOGCRS["WGS 84",
            ENSEMBLE["World Geodetic System 1984 ensemble",
                MEMBER["World Geodetic System 1984 (Transit)"],
                MEMBER["World Geodetic System 1984 (G730)"],
                MEMBER["World Geodetic System 1984 (G873)"],
                MEMBER["World Geodetic System 1984 (G1150)"],
                MEMBER["World Geodetic System 1984 (G1674)"],
                MEMBER["World Geodetic System 1984 (G1762)"],
                MEMBER["World Geodetic System 1984 (G2139)"],
                ELLIPSOID["WGS 84",6378137,298.257223563,
                    LENGTHUNIT["metre",1]],
                ENSEMBLEACCURACY[2.0]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            CS[ellipsoidal,2],
                AXIS["geodetic latitude (Lat)",north,
                    ORDER[1],
                    ANGLEUNIT["degree",0.0174532925199433]],
                AXIS["geodetic longitude (Lon)",east,
                    ORDER[2],
                    ANGLEUNIT["degree",0.0174532925199433]],
            USAGE[
                SCOPE["Horizontal component of 3D system."],
                AREA["World."],
                BBOX[-90,-180,90,180]],
            ID["EPSG",4326]]],
    ABRIDGEDTRANSFORMATION["NAD83 to WGS 84 (5)",
        METHOD["Coordinate Frame rotation (geog2D domain)",
            ID["EPSG",9607]],
        PARAMETER["X-axis translation",-0.991,
            ID["EPSG",8605]],
        PARAMETER["Y-axis translation",1.9072,
            ID["EPSG",8606]],
        PARAMETER["Z-axis translation",0.5129,
            ID["EPSG",8607]],
        PARAMETER["X-axis rotation",-0.0257899075194932,
            ID["EPSG",8608]],
        PARAMETER["Y-axis rotation",-0.0096500989602704,
            ID["EPSG",8609]],
        PARAMETER["Z-axis rotation",-0.0116599432323421,
            ID["EPSG",8610]],
        PARAMETER["Scale difference",1,
            ID["EPSG",8611]],
        USAGE[
            SCOPE["Geodesy."],
            AREA["United States (USA) - CONUS onshore - Alabama; 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[24.41,-124.79,49.38,-66.91]],
        ID["EPSG",1515],
        REMARK["Strictly between NAD83 and ITRF96(1997.0). Supersedes NAD83 to WGS 84 (4) (code 1308)."]]]

Definition: PROJ.4

+proj=utm +zone=20 +ellps=clrk66 +towgs84=-0.991,1.9072,0.5129,0.0257899075194932,0.0096500989602704,0.0116599432323421,0 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:26720","+proj=utm +zone=20 +ellps=clrk66 +towgs84=-0.991,1.9072,0.5129,0.0257899075194932,0.0096500989602704,0.0116599432323421,0 +units=m +no_defs +type=crs");

Definition: JSON

{
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    "type": "BoundCRS",
    "source_crs": {
        "type": "BoundCRS",
        "source_crs": {
            "type": "ProjectedCRS",
            "name": "NAD27 / UTM zone 20N",
            "base_crs": {
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                "datum": {
                    "type": "GeodeticReferenceFrame",
                    "name": "North American Datum 1927",
                    "ellipsoid": {
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                        "semi_major_axis": 6378206.4,
                        "semi_minor_axis": 6356583.8
                    }
                },
                "coordinate_system": {
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                            "name": "Geodetic latitude",
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                            "unit": "degree"
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                            "direction": "east",
                            "unit": "degree"
                        }
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                "method": {
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                        "code": 9807
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                },
                "parameters": [
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                        "name": "Latitude of natural origin",
                        "value": 0,
                        "unit": "degree",
                        "id": {
                            "authority": "EPSG",
                            "code": 8801
                        }
                    },
                    {
                        "name": "Longitude of natural origin",
                        "value": -63,
                        "unit": "degree",
                        "id": {
                            "authority": "EPSG",
                            "code": 8802
                        }
                    },
                    {
                        "name": "Scale factor at natural origin",
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                        "unit": "unity",
                        "id": {
                            "authority": "EPSG",
                            "code": 8805
                        }
                    },
                    {
                        "name": "False easting",
                        "value": 500000,
                        "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",
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                        "direction": "east",
                        "unit": "metre"
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                    {
                        "name": "Northing",
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                        "direction": "north",
                        "unit": "metre"
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            "id": {
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        },
        "target_crs": {
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            "name": "NAD83",
            "datum": {
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            "coordinate_system": {
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                        "direction": "east",
                        "unit": "degree"
                    }
                ]
            },
            "id": {
                "authority": "EPSG",
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        },
        "transformation": {
            "name": "NAD27 to NAD83 (1)",
            "method": {
                "name": "NADCON",
                "id": {
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            },
            "parameters": [
                {
                    "name": "Latitude difference file",
                    "value": "conus.las",
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                },
                {
                    "name": "Longitude difference file",
                    "value": "conus.los",
                    "id": {
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                    }
                }
            ],
            "id": {
                "authority": "EPSG",
                "code": 1241
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        }
    },
    "target_crs": {
        "type": "GeographicCRS",
        "name": "WGS 84",
        "datum_ensemble": {
            "name": "World Geodetic System 1984 ensemble",
            "members": [
                {
                    "name": "World Geodetic System 1984 (Transit)",
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                },
                {
                    "name": "World Geodetic System 1984 (G730)",
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                },
                {
                    "name": "World Geodetic System 1984 (G873)",
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                },
                {
                    "name": "World Geodetic System 1984 (G1150)",
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                },
                {
                    "name": "World Geodetic System 1984 (G1674)",
                    "id": {
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                        "code": 1155
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G1762)",
                    "id": {
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                {
                    "name": "World Geodetic System 1984 (G2139)",
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                        "direction": "north",
                        "unit": "degree"
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                    {
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            },
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        },
        "method": {
            "name": "Coordinate Frame rotation (geog2D domain)",
            "id": {
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                "code": 9607
            }
        },
        "parameters": [
            {
                "name": "X-axis translation",
                "value": -0.991,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8605
                }
            },
            {
                "name": "Y-axis translation",
                "value": 1.9072,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8606
                }
            },
            {
                "name": "Z-axis translation",
                "value": 0.5129,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8607
                }
            },
            {
                "name": "X-axis rotation",
                "value": -1.25033e-07,
                "unit": {
                    "type": "AngularUnit",
                    "name": "radian",
                    "conversion_factor": 1
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8608
                }
            },
            {
                "name": "Y-axis rotation",
                "value": -4.6785e-08,
                "unit": {
                    "type": "AngularUnit",
                    "name": "radian",
                    "conversion_factor": 1
                },
                "id": {
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                    "code": 8609
                }
            },
            {
                "name": "Z-axis rotation",
                "value": -5.6529e-08,
                "unit": {
                    "type": "AngularUnit",
                    "name": "radian",
                    "conversion_factor": 1
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8610
                }
            },
            {
                "name": "Scale difference",
                "value": 0,
                "unit": {
                    "type": "ScaleUnit",
                    "name": "parts per million",
                    "conversion_factor": 1e-06
                },
                "id": {
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                    "code": 8611
                }
            }
        ],
        "id": {
            "authority": "EPSG",
            "code": 1515
        }
    }
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=utm"
	"zone=20"
	"ellps=clrk66"
	"towgs84=-0.991,1.9072,0.5129,0.0257899075194932,0.0096500989602704,0.0116599432323421,0"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=utm +zone=20 +ellps=clrk66 +towgs84=-0.991,1.9072,0.5129,0.0257899075194932,0.0096500989602704,0.0116599432323421,0 +units=m +no_defs +type=crs">
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	</Layer>
</Map>