I have a shapefile of U.S. counties in USA Contiguous Albers Equal Area Conic. I want to do distance calculations. For example, distances from one county to another.
I do not know how to interpret the coordinates. I understand that the distance is in meters.
The ultimate goal is to use the distance as a part of a statistical procedure. Specifically, I am using it in a regression discontinuity design, in which I restrict the sample to counties that are a given distance from a particular line in the U.S. (e.g., the Central Time Zone). So, I'd like the distance to be fairly accurate because I am restricting the sample to be say 20 miles on either side of this line, and the distance should be accurate from a symmetrical perspective.
How may I recover a latitude and longitude?
I wanted to recover them so that I can apply the distance formula for coordinates by hand to get the distances in miles in a way that I can interpret. I've come across projections and UTM when searching, but I do not know what that means.
I use ArcMap 10.1.