EPSG:3857 — WGS 84 / Pseudo-Mercator

Projekte · World - 85°S to 85°N

Tanım Formatları

OGC WKT

PROJCS[
    "WGS 84 / Pseudo-Mercator",
    GEOGCS[
        "WGS 84",
        DATUM[
            "WGS_1984",
            SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],
            AUTHORITY["EPSG","6326"]
        ],
        PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4326"]
    ],
    PROJECTION["Mercator_1SP"],
    PARAMETER["central_meridian",0],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",0],
    PARAMETER["false_northing",0],
    UNIT["metre",1,AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    EXTENSION[
        "PROJ4",
        "+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs"
    ],
    AUTHORITY["EPSG","3857"]
]

WKT2

PROJCRS[
    "WGS 84 / Pseudo-Mercator",
    BASEGEOGCRS[
        "WGS 84",
        ENSEMBLE[
            "World Geodetic System 1984 ensemble",
            MEMBER["World Geodetic System 1984 (Transit)",ID["EPSG",1166]],
            MEMBER["World Geodetic System 1984 (G730)",ID["EPSG",1152]],
            MEMBER["World Geodetic System 1984 (G873)",ID["EPSG",1153]],
            MEMBER["World Geodetic System 1984 (G1150)",ID["EPSG",1154]],
            MEMBER["World Geodetic System 1984 (G1674)",ID["EPSG",1155]],
            MEMBER["World Geodetic System 1984 (G1762)",ID["EPSG",1156]],
            MEMBER["World Geodetic System 1984 (G2139)",ID["EPSG",1309]],
            MEMBER["World Geodetic System 1984 (G2296)",ID["EPSG",1383]],
            ELLIPSOID[
                "WGS 84",
                6378137,
                298.257223563,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",7030]
            ],
            ENSEMBLEACCURACY[2],
            ID["EPSG",6326]
        ],
        ID["EPSG",4326]
    ],
    CONVERSION[
        "Popular Visualisation Pseudo-Mercator",
        METHOD["Popular Visualisation Pseudo Mercator",ID["EPSG",1024]],
        PARAMETER[
            "Latitude of natural origin",
            0,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8801]
        ],
        PARAMETER[
            "Longitude of natural origin",
            0,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8802]
        ],
        PARAMETER[
            "False easting",
            0,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8806]
        ],
        PARAMETER[
            "False northing",
            0,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8807]
        ],
        ID["EPSG",3856]
    ],
    CS[Cartesian,2,ID["EPSG",4499]],
    AXIS["Easting (X)",east],
    AXIS["Northing (Y)",north],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",3857]
]

PROJ.4

+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs +type=crs

Proj4js

Proj4js'a nasıl projeksiyon eklerim? →

proj4.defs("EPSG:3857", "+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs +type=crs");

JSON

{
  "type": "CoordinateReferenceSystem",
  "code": 3857,
  "name": "WGS 84 / Pseudo-Mercator",
  "kind": "projected",
  "area": "World - 85°S to 85°N",
  "unit": "metre",
  "bbox": [
    -85.06,
    -180,
    85.06,
    180
  ],
  "proj4": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs +type=crs"
}

PostGIS

PostGIS'a nasıl projeksiyon eklerim? →

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (3857, 'EPSG', 3857, '+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs +type=crs', 'PROJCS["WGS 84 / Pseudo-Mercator",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],PROJECTION["Mercator_1SP"],PARAMETER["central_meridian",0],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],EXTENSION["PROJ4","+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs"],AUTHORITY["EPSG","3857"]]');

MapServer

MapServer'a nasıl projeksiyon eklerim? →

PROJECTION
  "+proj=merc"
  "+a=6378137"
  "+b=6378137"
  "+lat_ts=0"
  "+lon_0=0"
  "+x_0=0"
  "+y_0=0"
  "+k=1"
  "+units=m"
  "+nadgrids=@null"
  "+wktext"
  "+no_defs"
  "+type=crs"
END

GeoServer

GeoServer'a nasıl projeksiyon eklerim? →

3857=PROJCS["WGS 84 / Pseudo-Mercator",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],PROJECTION["Mercator_1SP"],PARAMETER["central_meridian",0],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],EXTENSION["PROJ4","+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs"],AUTHORITY["EPSG","3857"]]

İlişkili Koordinat Sistemleri (428)

Mevcut Dönüşümler (1293)

Dönüşümler temel CRS'den alınmıştır: EPSG:4326 (WGS 84)

Dönüşüm	Kaynak → Hedef	Hassasiyet (m)
JAD2001 to WGS 84 (1)	4758 → 4326	0
QND95 to WGS 84 (1)	4614 → 4326	0
PRS92 to WGS 84 (1)	4683 → 4326	0.05
Guadeloupe 1948 to WGS 84 (2)	4622 → 4326	0.1
LGD2006 to WGS 84 (1)	4754 → 4326	0.1
Martinique 1938 to WGS 84 (2)	4625 → 4326	0.1
WGS 84 to IG05/12 Intermediate CRS	4326 → 6990	0.1
Nahrwan 1967 to WGS 84 (12)	4270 → 4326	0.15
Pointe Noire to WGS 84 (3)	4282 → 4326	0.15
Bogota 1975 to WGS 84 (2)	4218 → 4326	0.2

World Geodetic System 1984 ensemble Kullanan Diğer CRS (366)

Sıkça Sorulan Sorular

EPSG:3857 projeksiyonunu GeoServer'a nasıl eklerim?

Aşağıdaki tanımı GeoServer yapılandırma dosyanıza ekleyin:

3857=PROJCS["WGS 84 / Pseudo-Mercator",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],PROJECTION["Mercator_1SP"],PARAMETER["central_meridian",0],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],EXTENSION["PROJ4","+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs"],AUTHORITY["EPSG","3857"]]

GeoServer rehberinin tamamını okuyun →

EPSG:3857 projeksiyonunu PostGIS'e nasıl eklerim?

Aşağıdaki tanımı PostGIS yapılandırma dosyanıza ekleyin:

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (3857, 'EPSG', 3857, '+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs +type=crs', 'PROJCS["WGS 84 / Pseudo-Mercator",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],PROJECTION["Mercator_1SP"],PARAMETER["central_meridian",0],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],EXTENSION["PROJ4","+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs"],AUTHORITY["EPSG","3857"]]');

PostGIS rehberinin tamamını okuyun →

EPSG:3857 projeksiyonunu MapServer'da nasıl kullanırım?

Aşağıdaki tanımı MapServer yapılandırma dosyanıza ekleyin:

PROJECTION
  "+proj=merc"
  "+a=6378137"
  "+b=6378137"
  "+lat_ts=0"
  "+lon_0=0"
  "+x_0=0"
  "+y_0=0"
  "+k=1"
  "+units=m"
  "+nadgrids=@null"
  "+wktext"
  "+no_defs"
  "+type=crs"
END

MapServer rehberinin tamamını okuyun →

EPSG:3857 projeksiyonunu Proj4js ile nasıl kullanırım?

Aşağıdaki tanımı Proj4js yapılandırma dosyanıza ekleyin:

proj4.defs("EPSG:3857", "+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs +type=crs");

Proj4js rehberinin tamamını okuyun →

Tür

Projekte

Birim

metre

Geodetik CRS

WGS 84

Datum

World Geodetic System 1984 ensemble

Kullanım Alanı

World - 85°S to 85°N

World between 85.06°S and 85.06°N.

Koordinat Sistemi

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

Merkez Koordinatları

0.00 -0.00

Projekte Sınırlar

20048966.10 -20037508.3420037508.34 -20048966.10

WGS84 Sınırları

85.06 -180.00180.00 -85.06

Veri Kaynağı

EPSG

Bilgi Kaynağı

Microsoft.

Revizyon Tarihi

2020-03-14

Kapsam

Web mapping and visualisation.

Açıklamalar

Not a recognised geodetic system. Uses spherical development of ellipsoidal coordinates. Relative to WGS 84 / World Mercator (CRS code 3395) gives errors of 0.7 percent in scale and differences in northing of up to 43km in the map (21km on the ground).

EPSG

3857

ESRI Eşdeğeri

ESRI:102100