I'm trying to make a map package, and the error comes up "Layers dataset is using an unknown coordinate system." When I right-click and select "help" it takes me to an ESRI page (error 00047) where it first tells me I must
- Define the coordinate system of the layer's dataset.
and then goes into detail on how to change the map's coordinate system, which is not what I need to do (the map is WGS 1984 UTM zone 10N). When I go into the source data in the layer properties, it does not indicate any way to change the coordinate system there. How can I do this? How can I know that it is the correct coordinate system? If I can't find the correct coordinate system, is that the end of my project?