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Common terms associated with non-WGS 84 applications include but are not limited to: Web Mercator, WGS 84 Web Mercator, WGS 1984 Web Mercator (auxiliary sphere) and European Petroleum Survey Group (EPSG) Spatial Reference System Identifier (SRID) (such as) EPSG: 3857. This is standard practice on the standard spherical Mercator projection, as well, but unlike Web Mercator, the spherical Mercator is not normally used for maps of local areas, such as street maps, and so the accuracy of positions needed for plotting is typically less than the angular deviation caused by using spherical formulas. This erroneous geospatial positioning information poses an unacceptable risk to global safety of navigation activities, and department of defense, intelligence community, and allied partner systems, missions, and operations that require accurate and precise positioning and navigation information. This is an expected behavior. The data doesn't have lat/long - rather X and Y - for example, a coordinate X = -13625357.1076 and Y = 4572333.7702 should correspond to -122.347748 and 37.9357576. By projecting coordinates surveyed against the ellipsoid as if they were surveyed on a sphere, angular relationships change slightly. Remarks: Uses spherical development of ellipsoidal coordinates. Note: The coordinate system for the original map is not changed. This tool uses JavaScript and much of it will not work correctly without it enabled. (link to data is See Spatial Reference SR-ORG:6928 and Spatial Reference SR-ORG:7483. With EPSG(900913) the output is georeferenced, but shifted about 3 raster cells to the north: When I reproject the raster using ArcGIS (export in WGS_1984_Web_Mercator_Auxiliary_Sphere) the result is nearly fine: To be specific, one example here is that the WKID 4326 uses decimal degrees and WKID 3857 uses meters. I understand what the difference is between the Web Mercator projection and Web Mercator Auxiliary Sphere (WMAS). Users are advised that many projected, un-projected, and local spatial coordinate system definitions do not conform to WGS 84.A spherical or Web Mercator spatial reference system uses mathematical formulas and parameters that are incompatible with and non-compliant to the WGS 84. It rose to prominence when Google Maps adopted it in 2005. This message outlines the risks associated with the use of Web Mercator applications for DoD and GEOINT user community operations. ESRI WGS_1984_Web_Mercator_Auxiliary_Sphere The identifier by ESRI is EPSG:3857.

Please bookmark the new location for I typically only work with transverse mercator projections (UTM, 3TM, 10TM) and this one seems a bit different. This is not a limitation for street maps, which is the primary purpose for such services.
The code above transforms coordinates from WGS84 Web Mercator Auxiliary Sphere to WGS84 correctly. However, from the REST endpoint of a hosted service, the spatial reference being used may appear as 102100 (3857). The projection used for all tiled base map services in The National Map is the World Geodetic System 1984 (WGS 84) Web Mercator (Auxiliary Sphere) so that base map services can be used in combination with other common viewers.

click this link. The publishing process only changes the coordinate system for the web layer, then uses this to create tiles for the cached web layer. It is far away up in WGS 84 data frame (but will be ok if I switch the data frame to Web Mercator). Get answers fast from product experts in the forums.Tell us about your issue and find the best support option.Get answers fast from Autodesk support staff and product experts in the forums.Share and vote on ideas for future product releases.Connect, consult with, and hire trusted industry experts on the Autodesk Services Marketplace.AutoCAD Map 3D 2016, AutoCAD Map 3D 2017, AutoCAD Map 3D 2018, AutoCAD Map 3D 2019, & Civil 3D 2019 WGS 1984 Web Mercator and WGS 1984 Web Mercator (Auxiliary Sphere) use a conformal projection that preserves direction and the shape of data but distorts distance and area. What this means is that angles between lines on the surface will not, in general, be mapped to exactly the same angles. The NGA Geomatics Office has assessed the use of Web Mercator and other non-WGS 84 spatial reference systems may cause geo-location / geo-coordinate errors up to 40,000 meters. For example, The The value 85.051129° is the latitude at which the full projected map becomes a square, and is computed as The projection is neither strictly ellipsoidal nor strictly spherical. I need to convert data to the web mercator auxiliary sphere projection, which is commonly used by Google Maps. Another example here is that, if you look at the technical differences between these two WKIDs, you'll see they are inherently different despite the fact that they are so similar:ArcCatalog projection definition for "WGS 1984 Web Mercator.prj"ArcCatalog projection definition for "WGS 1984 Web Mercator (Auxiliary Sphere).prj"I've read recently that Google Earth doesn't always have the best reproject capabilities.