Discussion :

[mga_geo]

Je viens de consulter le site http://spatialreference.org pour la projection EPSG:3857 et la réponse est

EPSG:3857 (Google it)

Used by certain Web mapping and visualization applications. Uses spherical development of ellipsoidal coordinates. Relative to an ellipsoidal development errors of up to 800 meters in position and 0.7 percent in scale may arise. It is not a recognized geodetic system: see WGS 84 / World Mercator (CRS code 3395).

[julienltr]

Bonjour,

Sur le Wiki d'OSM on peut lire ceci :
http://wiki.openstreetmap.org/wiki/EPSG:3857

• 54004 - Google Maps uses this projection, in decimal degrees, others meters sometimes (sometimes equivalent?)

• OSGEO:41001 - OSGeo created this code while developing the Tile Map Service (TMS) specification. [1] It was superceded by 900913. (equivalent, deprecated)

• 900913 - Sometimes described as EPSG:900913, this was created for OpenLayers (equivalent)

• ESRI:102113 - First used by ESRI, but then replaced by 102100 (equivalent, deprecated)

• ESRI:102100 - Built differently, but equivalent to 102113 (equivalent, deprecated)

• EPSG:3785 - EPSG added this, similiar to how ESRI:102113 is defined (equivalent, deprecated)

• EPSG:3587 - was never a real EPSG code, but some used this likely as a mistype of EPSG:3785 (mistype)

• EPSG:3857 - EPSG replaced EPSG:3785 with this, and ESRI replaced ESRI:102100 with this (current)

Donc pour moi, "EPSG:3857" est bien le code qui tend à être le "standard".

[dgrichard]

Il y a même pas à charger :

Code :

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http://epsg-registry.org/

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