The Physical Data tab of the System Coefficients dialog contains information on the location, elevation and size of the simulated watershed.
Latitude is the watershed’s latitude north of the equator. (-90 to 90 degrees)
Longitude is the watershed’s longitude east of the prime meridian. (-180 to 180 degrees)
Elevation is the representative elevation of the watershed. (m above MSL)
Watershed Area is the area of the entire watershed (> 0 m2)