Data projection in Web Map

Discussion created by jitendrudu on Jun 6, 2018

There are some Geodesy/ Survey points are imported from Survey products using a custom python tool in ArcMap and which has a projection in State plane, a tool transforms the projection to UTM on import into a GDB.  There is an ESRI JS API map application. It displays these Survey / Geodesy points which has UTM projection. The issue is - when in Arcmap desktop, the points are displayed correctly on the Map; while on the web map the same points have the incorrect location. My take is that the Map Service is having a projection issue on the web map. Question is, can the web map display the data which may be in different projections correctly by some 'auto' re-project? Or the app has to do an explicit transformation?