I have animal location data that was collected in UTMs by some assistants and Lat Long by other assistants. I would like to combine these data into layers for each individual animal to show these location points. I'm uncertain what is the best way to do this. It appears Data Frame is in WGS 1984 World Mercator coordinate system so I would like to change both these UTM data and Lat Long data to this as well. All suggestions are most welcome. Thank you in advance.