In this case I'm working with county lines from TIGER, but in general, I'm trying to sort out how to know what CRS my data is in.
I thought this would be in the shapefile's
.prj but all I see there is:
EOGCS["GCS_North_American_1983", DATUM["D_North_American_1983", SPHEROID["GRS_1980",6378137,298.257222101]], PRIMEM["Greenwich",0], UNIT["Degree",0.017453292519943295]]
Is there a reliable way to discern the CRS of any one shapefile?