I am creating a wildlife survey form that has a field where users enter location. Users will be able to enter location using a map (i.e. draggable pushpin) or by manually entering lat/lng. My clients are also requesting an option for entering UTM coordinates.
If a user does enter UTM coords I would like to convert these before pushing to the database. I've seen a couple websites that have utilities for converting UTM to decimal degrees.
Does ESRI have a web service that I could pass UTM coords to and get lat/lng back?