PhilaPlace integrates history with location through an interface that makes examining historical information by location straightforward.
The site was launched on December 9, 2009 and updated March 29, 2010 as described in this announcement (emphasis added):
On the PhilaPlace “Map” page at PhilaPlace.org, visitors can click on the new “Streets” tab and view [...]
David Crosson, the Executive Director of the California Historical Society, raised this question in a LinkedIn group:
Q: Is anyone aware of state, regional, or national studies that identify creative benchmarks against which to measure the effectiveness of a history organization’s website? Is there a bell curve out there for site visits, [...]