GIS in the humanities

Now that the humanities have discovered GIS, as reported in the paper of record, we can stop making things up about our past.  Did General Lee have a better view at Gettysburg than we previously thought?  Can you trust that eyewitness testmony from Auschwitz-Birkenau after you compared it with the 3d map of the camp during construction?  Did witchcraft really spread like a disease in communities around Salem, MA?

h/t MRK