EPSG:15487

TWD67 / TM2 zone 121 to TWD97 / TM2 zone 121 (1)

Attributes

Geodetic CRS: TWD67

Datum: Taiwan Datum 1967

Ellipsoid: GRS 1967 Modified

Prime meridian: Greenwich

Data source: EPSG

Information source: Aerial Survey Office, Taiwan Forest Bureau.

Revision date: 2012-01-21

Scope: Transformation of coordinates at 5m level of accuracy.

Remarks: Derived at Hu Tzu Shan (23°59'N, 120°58'E). Residuals increase to maximum of 6.4m as distance increases from this point.

Method: Cartesian Grid Offsets

Area of use: Taiwan, Republic of China - onshore - Taiwan Island.

Description: (0,)

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Definition: OGC Well Known Text 2 (2019)

COORDINATEOPERATION["TWD67 / TM2 zone 121 to TWD97 / TM2 zone 121 (1)",
    VERSION["asafi-Twn"],
    SOURCECRS[
        PROJCRS["TWD67 / TM2 zone 121",
            BASEGEOGCRS["TWD67",
                DATUM["Taiwan Datum 1967",
                    ELLIPSOID["GRS 1967 Modified",6378160,298.25,
                        LENGTHUNIT["metre",1]]],
                PRIMEM["Greenwich",0,
                    ANGLEUNIT["degree",0.0174532925199433]],
                ID["EPSG",3821]],
            CONVERSION["Taiwan 2-degree TM zone 121",
                METHOD["Transverse Mercator",
                    ID["EPSG",9807]],
                PARAMETER["Latitude of natural origin",0,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8801]],
                PARAMETER["Longitude of natural origin",121,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8802]],
                PARAMETER["Scale factor at natural origin",0.9999,
                    SCALEUNIT["unity",1],
                    ID["EPSG",8805]],
                PARAMETER["False easting",250000,
                    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]],
            ID["EPSG",3828]]],
    TARGETCRS[
        PROJCRS["TWD97 / TM2 zone 121",
            BASEGEOGCRS["TWD97",
                DATUM["Taiwan Datum 1997",
                    ELLIPSOID["GRS 1980",6378137,298.257222101,
                        LENGTHUNIT["metre",1]]],
                PRIMEM["Greenwich",0,
                    ANGLEUNIT["degree",0.0174532925199433]],
                ID["EPSG",3824]],
            CONVERSION["Taiwan 2-degree TM zone 121",
                METHOD["Transverse Mercator",
                    ID["EPSG",9807]],
                PARAMETER["Latitude of natural origin",0,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8801]],
                PARAMETER["Longitude of natural origin",121,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8802]],
                PARAMETER["Scale factor at natural origin",0.9999,
                    SCALEUNIT["unity",1],
                    ID["EPSG",8805]],
                PARAMETER["False easting",250000,
                    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]],
            ID["EPSG",3826]]],
    METHOD["Cartesian Grid Offsets",
        ID["EPSG",9656]],
    PARAMETER["Easting offset",828.589,
        LENGTHUNIT["metre",1],
        ID["EPSG",8728]],
    PARAMETER["Northing offset",-206.915,
        LENGTHUNIT["metre",1],
        ID["EPSG",8729]],
    OPERATIONACCURACY[7.0],
    USAGE[
        SCOPE["Transformation of coordinates at 5m level of accuracy."],
        AREA["Taiwan, Republic of China - onshore - Taiwan Island."],
        BBOX[21.87,119.99,25.34,122.06]],
    ID["EPSG",15487],
    REMARK["Derived at Hu Tzu Shan (23°59'N, 120°58'E). Residuals increase to maximum of 6.4m as distance increases from this point."]]

Definition: PROJ.4

+proj=affine +xoff=828.589 +yoff=-206.915

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:15487","+proj=affine +xoff=828.589 +yoff=-206.915");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "Transformation",
    "name": "TWD67 / TM2 zone 121 to TWD97 / TM2 zone 121 (1)",
    "source_crs": {
        "type": "ProjectedCRS",
        "name": "TWD67 / TM2 zone 121",
        "base_crs": {
            "type": "GeographicCRS",
            "name": "TWD67",
            "datum": {
                "type": "GeodeticReferenceFrame",
                "name": "Taiwan Datum 1967",
                "ellipsoid": {
                    "name": "GRS 1967 Modified",
                    "semi_major_axis": 6378160,
                    "inverse_flattening": 298.25
                }
            },
            "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": 3821
            }
        },
        "conversion": {
            "name": "Taiwan 2-degree TM zone 121",
            "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": 121,
                    "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": 250000,
                    "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"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 3828
        }
    },
    "target_crs": {
        "type": "ProjectedCRS",
        "name": "TWD97 / TM2 zone 121",
        "base_crs": {
            "type": "GeographicCRS",
            "name": "TWD97",
            "datum": {
                "type": "GeodeticReferenceFrame",
                "name": "Taiwan Datum 1997",
                "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": 3824
            }
        },
        "conversion": {
            "name": "Taiwan 2-degree TM zone 121",
            "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": 121,
                    "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": 250000,
                    "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"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 3826
        }
    },
    "method": {
        "name": "Cartesian Grid Offsets",
        "id": {
            "authority": "EPSG",
            "code": 9656
        }
    },
    "parameters": [
        {
            "name": "Easting offset",
            "value": 828.589,
            "unit": "metre",
            "id": {
                "authority": "EPSG",
                "code": 8728
            }
        },
        {
            "name": "Northing offset",
            "value": -206.915,
            "unit": "metre",
            "id": {
                "authority": "EPSG",
                "code": 8729
            }
        }
    ],
    "accuracy": "7.0",
    "scope": "Transformation of coordinates at 5m level of accuracy.",
    "area": "Taiwan, Republic of China - onshore - Taiwan Island.",
    "bbox": {
        "south_latitude": 21.87,
        "west_longitude": 119.99,
        "north_latitude": 25.34,
        "east_longitude": 122.06
    },
    "id": {
        "authority": "EPSG",
        "code": 15487
    },
    "remarks": "Derived at Hu Tzu Shan (23°59'N, 120°58'E). Residuals increase to maximum of 6.4m as distance increases from this point."
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=affine"
	"xoff=828.589"
	"yoff=-206.915"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=affine +xoff=828.589 +yoff=-206.915">
	<Layer srs="+proj=affine +xoff=828.589 +yoff=-206.915">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 15487, 'EPSG', 15487, '+proj=affine +xoff=828.589 +yoff=-206.915', 'None');