EPSG:3991

Puerto Rico State Plane CS of 1927

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

Selected transformation

Method: NADCON

Grid Files: prvi.las prvi.los

Remarks: Parameter files are from Puerto Rico to NAD83 (1) (code 1461) assuming that NAD83 is equivalent to WGS 84 within the accuracy of the transformation.

Information source: OGP

Revision date: 2021-09-10

Attributes

Unit: US survey foot

Geodetic CRS: Puerto Rico

Datum: Puerto Rico

Ellipsoid: Clarke 1866

Prime meridian: Greenwich

Data source: EPSG

Information source: US National Geodetic Survey

Revision date: 2009-09-05

Scope: Engineering survey, topographic mapping.

Remarks: Sometimes erroneously referred to as NAD27 / Puerto Rico State Plane CS.

Area of use: Puerto Rico - onshore.

Coordinate system: Cartesian 2D CS. Axes: easting, northing (X,Y). Orientations: east, north. UoM: ftUS.

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Center coordinates
448970.59 141143.61

Projected bounds:
-34445.97 14031.11
932184.06 270455.89

WGS84 bounds:
-67.97 17.87
-65.19 18.57

Puerto Rico - onshore.
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Definition: OGC Well Known Text 2 (2019)

PROJCRS["Puerto Rico State Plane CS of 1927",
    BASEGEOGCRS["Puerto Rico",
        DATUM["Puerto Rico",
            ELLIPSOID["Clarke 1866",6378206.4,294.978698213898,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",4139]],
    CONVERSION["Puerto Rico CS27",
        METHOD["Lambert Conic Conformal (2SP)",
            ID["EPSG",9802]],
        PARAMETER["Latitude of false origin",17.8333333333333,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8821]],
        PARAMETER["Longitude of false origin",-66.4333333333333,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8822]],
        PARAMETER["Latitude of 1st standard parallel",18.4333333333333,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8823]],
        PARAMETER["Latitude of 2nd standard parallel",18.0333333333333,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8824]],
        PARAMETER["Easting at false origin",500000,
            LENGTHUNIT["US survey foot",0.304800609601219],
            ID["EPSG",8826]],
        PARAMETER["Northing at false origin",0,
            LENGTHUNIT["US survey foot",0.304800609601219],
            ID["EPSG",8827]]],
    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["Puerto Rico - onshore."],
        BBOX[17.87,-67.97,18.57,-65.19]],
    ID["EPSG",3991]]

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "ProjectedCRS",
    "name": "Puerto Rico State Plane CS of 1927",
    "base_crs": {
        "name": "Puerto Rico",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Puerto Rico",
            "ellipsoid": {
                "name": "Clarke 1866",
                "semi_major_axis": 6378206.4,
                "inverse_flattening": 294.978698213898
            }
        },
        "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": 4139
        }
    },
    "conversion": {
        "name": "Puerto Rico CS27",
        "method": {
            "name": "Lambert Conic Conformal (2SP)",
            "id": {
                "authority": "EPSG",
                "code": 9802
            }
        },
        "parameters": [
            {
                "name": "Latitude of false origin",
                "value": 17.8333333333333,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8821
                }
            },
            {
                "name": "Longitude of false origin",
                "value": -66.4333333333333,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8822
                }
            },
            {
                "name": "Latitude of 1st standard parallel",
                "value": 18.4333333333333,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8823
                }
            },
            {
                "name": "Latitude of 2nd standard parallel",
                "value": 18.0333333333333,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8824
                }
            },
            {
                "name": "Easting at false origin",
                "value": 500000,
                "unit": {
                    "type": "LinearUnit",
                    "name": "US survey foot",
                    "conversion_factor": 0.304800609601219
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8826
                }
            },
            {
                "name": "Northing at false origin",
                "value": 0,
                "unit": {
                    "type": "LinearUnit",
                    "name": "US survey foot",
                    "conversion_factor": 0.304800609601219
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8827
                }
            }
        ]
    },
    "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
                }
            }
        ]
    },
    "scope": "Engineering survey, topographic mapping.",
    "area": "Puerto Rico - onshore.",
    "bbox": {
        "south_latitude": 17.87,
        "west_longitude": -67.97,
        "north_latitude": 18.57,
        "east_longitude": -65.19
    },
    "id": {
        "authority": "EPSG",
        "code": 3991
    }
}