When searching for Lat Long using my own basemap, they plot in wrong place.

Discussion created by cboland on Jan 3, 2013
Latest reply on Jan 3, 2013 by mminami-esristaff
I am  using one of my agency's basemaps that we push out as a webservice as a basemap on ArcGIS.com.  We have been plotting points on the basemap by typing in the lat long of a known point.  Up until the beginning - middle of December 2012, it was working ok, but more recently, the lat longs are not plotting where they are supposed to.  I have tested using the webservice in ArcMap and when I plot a point graphic based upon the same lat long, it shows up in the right place, so I know that there isn't a projection issue with the web service.  Has ESRI changed something that may be problematic with my custom projection?  What else might be causing this projection shift in my ArcGIS.com map?

My basemap is projected using a custom projection that we call PCS_albers which is defined as below:
Spatial Reference: PROJCS["PCS_Albers",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Albers"],PARAMETER["False_Easting",400000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-84.0],PARAMETER["Standard_Parallel_1",24.0],PARAMETER["Standard_Parallel_2",31.5],PARAMETER["Latitude_Of_Origin",24.0],UNIT["Meter",1.0]]

e.g. If I plot the coordinates -82.634, 27.762 in ArcMap using the basemap, the point shows up in Saint Petersburg, FL, but if i use ArcGIS online, it is plotting in the middle of the Gulf of Mexico north of the Yucatan Penninsula.

Thanks much!

this only seems to occur when the map service is added as a basemap.  When I add the service without checking the "Use as Basemap" checkbox, it does not shift the service.