EPSG:3121

PRS92 / Philippines zone 1

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Available transformations
to EPSG:4326
No other targets exist for this CRS

  • Philippines - onshore and offshore. , accuracy 0.05 m, code 15708 (default) [7]

Selected transformation

Method: Coordinate Frame rotation (geog2D domain)

Remarks: Derived during GPS campaign which established PRS92 coordinates at 330 first order stations.

Information source: National Mapping and Resource Information Authority, Coast and Geodetic Survey Department.

Revision date: 2020-03-14

Attributes

Unit: metre

Geodetic CRS: PRS92

Datum: Philippine Reference System 1992

Ellipsoid: Clarke 1866

Prime meridian: Greenwich

Data source: EPSG

Information source: National Mapping and Resource Information Authority, Coast and Geodetic Survey Department.

Revision date: 2004-12-24

Scope: Engineering survey, topographic mapping.

Remarks: Replaces Luzon 1911 / Philippines zone I (CRS code 25391).

Area of use: Philippines - west of 118°E onshore and offshore.

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

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SimpleMap

Center coordinates
1152339.34 1399807.86

Projected bounds:
393173.26 331748.5
1951895.58 2511711.31

WGS84 bounds:
116.04 3.0
129.95 22.18

Philippines - onshore and offshore.
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Definition: OGC Well Known Text

PROJCS["PRS92 / Philippines zone 1",
    GEOGCS["PRS92",
        DATUM["Philippine_Reference_System_1992",
            SPHEROID["Clarke 1866",6378206.4,294.978698213898],
            TOWGS84[-127.62,-67.24,-47.04,3.068,-4.903,-1.578,-1.06]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4683"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",117],
    PARAMETER["scale_factor",0.99995],
    PARAMETER["false_easting",500000],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","3121"]]

Definition: OGC Well Known Text 2 (2019)

PROJCRS["PRS92 / Philippines zone 1",
    BASEGEOGCRS["PRS92",
        DATUM["Philippine Reference System 1992",
            ELLIPSOID["Clarke 1866",6378206.4,294.978698213898,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",4683]],
    CONVERSION["Philippines zone I",
        METHOD["Transverse Mercator",
            ID["EPSG",9807]],
        PARAMETER["Latitude of natural origin",0,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8801]],
        PARAMETER["Longitude of natural origin",117,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8802]],
        PARAMETER["Scale factor at natural origin",0.99995,
            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["easting (X)",east,
            ORDER[1],
            LENGTHUNIT["metre",1]],
        AXIS["northing (Y)",north,
            ORDER[2],
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Engineering survey, topographic mapping."],
        AREA["Philippines - west of 118°E onshore and offshore."],
        BBOX[6.21,116.04,18.64,118]],
    ID["EPSG",3121]]

Definition: ESRI Well Known Text

PROJCS["PRS_1992_Philippines_Zone_I",
    GEOGCS["GCS_PRS_1992",
        DATUM["D_Philippine_Reference_System_1992",
            SPHEROID["Clarke_1866",6378206.4,294.978698213898]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["False_Easting",500000.0],
    PARAMETER["False_Northing",0.0],
    PARAMETER["Central_Meridian",117.0],
    PARAMETER["Scale_Factor",0.99995],
    PARAMETER["Latitude_Of_Origin",0.0],
    UNIT["Meter",1.0]]

Definition: PROJ.4

+proj=tmerc +lat_0=0 +lon_0=117 +k=0.99995 +x_0=500000 +y_0=0 +ellps=clrk66 +towgs84=-127.62,-67.24,-47.04,3.068,-4.903,-1.578,-1.06 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:3121","+proj=tmerc +lat_0=0 +lon_0=117 +k=0.99995 +x_0=500000 +y_0=0 +ellps=clrk66 +towgs84=-127.62,-67.24,-47.04,3.068,-4.903,-1.578,-1.06 +units=m +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "ProjectedCRS",
    "name": "PRS92 / Philippines zone 1",
    "base_crs": {
        "name": "PRS92",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Philippine Reference System 1992",
            "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": 4683
        }
    },
    "conversion": {
        "name": "Philippines zone I",
        "method": {
            "name": "Transverse Mercator",
            "id": {
                "authority": "EPSG",
                "code": 9807
            }
        },
        "parameters": [
            {
                "name": "Latitude of natural origin",
                "value": 0,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8801
                }
            },
            {
                "name": "Longitude of natural origin",
                "value": 117,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8802
                }
            },
            {
                "name": "Scale factor at natural origin",
                "value": 0.99995,
                "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",
                "abbreviation": "X",
                "direction": "east",
                "unit": "metre"
            },
            {
                "name": "Northing",
                "abbreviation": "Y",
                "direction": "north",
                "unit": "metre"
            }
        ]
    },
    "scope": "Engineering survey, topographic mapping.",
    "area": "Philippines - west of 118°E onshore and offshore.",
    "bbox": {
        "south_latitude": 6.21,
        "west_longitude": 116.04,
        "north_latitude": 18.64,
        "east_longitude": 118
    },
    "id": {
        "authority": "EPSG",
        "code": 3121
    }
}

Definition: GeoServer

3121=PROJCS["PRS92 / Philippines zone 1",GEOGCS["PRS92",DATUM["Philippine_Reference_System_1992",SPHEROID["Clarke 1866",6378206.4,294.978698213898],TOWGS84[-127.62,-67.24,-47.04,3.068,-4.903,-1.578,-1.06]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4683"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",117],PARAMETER["scale_factor",0.99995],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","3121"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"lat_0=0"
	"lon_0=117"
	"k=0.99995"
	"x_0=500000"
	"y_0=0"
	"ellps=clrk66"
	"towgs84=-127.62,-67.24,-47.04,3.068,-4.903,-1.578,-1.06"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=tmerc +lat_0=0 +lon_0=117 +k=0.99995 +x_0=500000 +y_0=0 +ellps=clrk66 +towgs84=-127.62,-67.24,-47.04,3.068,-4.903,-1.578,-1.06 +units=m +no_defs +type=crs">
	<Layer srs="+proj=tmerc +lat_0=0 +lon_0=117 +k=0.99995 +x_0=500000 +y_0=0 +ellps=clrk66 +towgs84=-127.62,-67.24,-47.04,3.068,-4.903,-1.578,-1.06 +units=m +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 3121, 'EPSG', 3121, '+proj=tmerc +lat_0=0 +lon_0=117 +k=0.99995 +x_0=500000 +y_0=0 +ellps=clrk66 +towgs84=-127.62,-67.24,-47.04,3.068,-4.903,-1.578,-1.06 +units=m +no_defs +type=crs', 'PROJCS["PRS92 / Philippines zone 1",GEOGCS["PRS92",DATUM["Philippine_Reference_System_1992",SPHEROID["Clarke 1866",6378206.4,294.978698213898],TOWGS84[-127.62,-67.24,-47.04,3.068,-4.903,-1.578,-1.06]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4683"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",117],PARAMETER["scale_factor",0.99995],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","3121"]]');