Guam 1963 / Guam SPCS

Guam - onshore. , accuracy 5.0 m, code 1069 (default) [grid]
Guam - onshore. , accuracy 6.0 m, code 1070 [3]

Selected transformation

Name: Guam 1963 to WGS 84 (2)

Grid Files: guhpgn.las guhpgn.los

Remarks: Parameter files are from Guam 1963 to NAD83(HARN) (1) (code 1068), but for many purposes NAD83(HARN) can be considered to be coincident with WGS 84 within the accuracy of the transformation.

Information source: OGP

Revision date: 2021-09-23

Attributes

Unit: metre

Geodetic CRS: Guam 1963

Datum: Guam 1963

Ellipsoid: Clarke 1866

Prime meridian: Greenwich

Data source: EPSG

Information source: US National Geodetic Survey

Revision date: 2009-07-29

Scope: Cadastre, engineering survey, topographic mapping (large and medium scale).

Remarks: Replaced by NAD83(HARN) / Guam Map Grid (CRS code 4414) from 1995.

Area of use: Guam - onshore.

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

Covered area powered by MapTiler

Center coordinates
54746.24 46250.32

Projected bounds:
31443.62 17485.32
78058.94 75029.52

WGS84 bounds:
144.58 13.18
145.01 13.7

Guam - onshore.

Definition: OGC Well Known Text 2 (2019)

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PROJCRS["Guam 1963 / Guam SPCS",
    BASEGEOGCRS["Guam 1963",
        DATUM["Guam 1963",
            ELLIPSOID["Clarke 1866",6378206.4,294.978698213898,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",4675]],
    CONVERSION["Guam SPCS",
        METHOD["Guam Projection",
            ID["EPSG",9831]],
        PARAMETER["Latitude of natural origin",13.4724663527778,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8801]],
        PARAMETER["Longitude of natural origin",144.748750705556,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8802]],
        PARAMETER["False easting",50000,
            LENGTHUNIT["metre",1],
            ID["EPSG",8806]],
        PARAMETER["False northing",50000,
            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]],
    USAGE[
        SCOPE["Cadastre, engineering survey, topographic mapping (large and medium scale)."],
        AREA["Guam - onshore."],
        BBOX[13.18,144.58,13.7,145.01]],
    ID["EPSG",3993]]

Definition: PROJ.4

+proj=aeqd +guam +lat_0=13.4724663527778 +lon_0=144.748750705556 +x_0=50000 +y_0=50000 +ellps=clrk66 +nadgrids=us_noaa_guhpgn.tif +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:3993","+proj=aeqd +guam +lat_0=13.4724663527778 +lon_0=144.748750705556 +x_0=50000 +y_0=50000 +ellps=clrk66 +nadgrids=us_noaa_guhpgn.tif +units=m +no_defs +type=crs");

Definition: JSON

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{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "ProjectedCRS",
    "name": "Guam 1963 / Guam SPCS",
    "base_crs": {
        "type": "GeographicCRS",
        "name": "Guam 1963",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Guam 1963",
            "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": 4675
        }
    },
    "conversion": {
        "name": "Guam SPCS",
        "method": {
            "name": "Guam Projection",
            "id": {
                "authority": "EPSG",
                "code": 9831
            }
        },
        "parameters": [
            {
                "name": "Latitude of natural origin",
                "value": 13.4724663527778,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8801
                }
            },
            {
                "name": "Longitude of natural origin",
                "value": 144.748750705556,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8802
                }
            },
            {
                "name": "False easting",
                "value": 50000,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8806
                }
            },
            {
                "name": "False northing",
                "value": 50000,
                "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"
            }
        ]
    },
    "scope": "Cadastre, engineering survey, topographic mapping (large and medium scale).",
    "area": "Guam - onshore.",
    "bbox": {
        "south_latitude": 13.18,
        "west_longitude": 144.58,
        "north_latitude": 13.7,
        "east_longitude": 145.01
    },
    "id": {
        "authority": "EPSG",
        "code": 3993
    }
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=aeqd"
	"guam"
	"lat_0=13.4724663527778"
	"lon_0=144.748750705556"
	"x_0=50000"
	"y_0=50000"
	"ellps=clrk66"
	"nadgrids=us_noaa_guhpgn.tif"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=aeqd +guam +lat_0=13.4724663527778 +lon_0=144.748750705556 +x_0=50000 +y_0=50000 +ellps=clrk66 +nadgrids=us_noaa_guhpgn.tif +units=m +no_defs +type=crs">
	<Layer srs="+proj=aeqd +guam +lat_0=13.4724663527778 +lon_0=144.748750705556 +x_0=50000 +y_0=50000 +ellps=clrk66 +nadgrids=us_noaa_guhpgn.tif +units=m +no_defs +type=crs">
	</Layer>
</Map>

EPSG:3993