If I am using ArcGIS Online basemaps in my Flex Viewer, is there any way I can avoid the co-ordinate system being in Web Mercator?
I have tried adding a WKID to the map configuration file and added another basemap in the correct co-ordinate system as the first basemap, but nothing seems to change the display of Web Mercator in the scale bar or in the Co-ordinate Menu.
The simple answer is no... As the ArcGIS online Basemaps are cached which means you are just getting back pre-made images of the map, they will not be re-projected to meet your needs. If you have ever re-projected a image in ArcMap than you will realize the re-projecting many images that consist of the cache view is now feasible.
Thanks for your answer Robert, I won't try any further...
And thank you so much for your Flex Widgets - I have been busy putting them into my web map and they are fantastic. You name comes up every time I find something useful!