Arcgis Imagery Basemap Coordinate System. Adding a basemap changes the coordinate system of the data frame to web mercator auxiliary sphere description when adding a basemap to arcmap 10 1 using the add basemap dialog the map display is not refreshed and the coordinate system of the data frame is changed to wgs 1984 web mercator auxiliary sphere. I like to just use the esri online basemaps such as this one but it uses 102100 for a coordinate system instead of 4326 which is what i have all my other layers in.
I have a arcgis we application that depends on all coordinate systems of the layers and basemaps to be the same which i would think is standard practice. If it uses the arcgis online tiling scheme it will use web mercator auxiliary sphere all through the rest of the process. To output a global scene with a web mercator auxiliary sphere coordinate system a basemap must be added to the global scene.
I have an aerial photo which doesn t match up with esri world imagery basemap in arcgis 10 2.
When you use your own basemap your map uses the coordinate system of that basemap instead of web mercator the coordinate system of esri basemaps. You can use basemaps from arcgis server layers ogc layers and tile layers. Adding a basemap changes the coordinate system of the data frame to web mercator auxiliary sphere description when adding a basemap to arcmap 10 1 using the add basemap dialog the map display is not refreshed and the coordinate system of the data frame is changed to wgs 1984 web mercator auxiliary sphere. When i add the base map imagery the coordinate system of the data in use is changed.