| Camera Maker | Canon | Camera Model | Canon EOS-1Ds Mark III |
| Aperture | f/2.8 | Exposure Value | 0 EV |
| Exposure Program | Manual | Exposure Time | 1/1250 sec |
| Flash | No Flash | Focal Length | 70 mm |
| ISO | 400 | Metering Mode | Pattern |
| Date/Time | 2011:10:18 12:05:10 | Resolution Unit | Inch |
| X Resolution | 240 dots per ResolutionUnit | Y Resolution | 240 dots per ResolutionUnit |
| Compression | Jpeg Compression | Exposure Mode | 1 |
| Subject Distance | 2.25 | Keywords | Robert Patterson historic marker Pennsylvania United States attraction destination display education information landmark marker sign tourist United States of America Philadelphia attractive educating historical marker Historical Site Historical Sites info Lewis and Clark Expedition Meriwether Lewis Philadelphia County Place of Interest Places of Interest professor road side Road sign Roadside signage tour tourism tourist attraction Tourist Destination Tourist Destinations travel Travel Destination Travel Destinations University of Pennsylvania appealing no people PA sightseeing text attract history nobody sightsee US word daytime destinations displays Jason O. Watson / historical-markers.org historic markers landmarks markers signs tourists appeal color image educate historic outdoor USA vertical day historical markers professors road sides tourist attractions tours colour image historical outside U.S. day time U.S.A. day-time words color images daylight outdoors verticals colour images natural light outsides historic site sign with text |
| Caption | ROBERT PATTERSON (1743-1824) Professor, chair of mathematics dept. and vice-provost at University of Pennsylvania, 1799-1814. Tutored Meriwether Lewis in navigation skills to prepare for Lewis and Clark Expedition, 1803-1806. Resided here. Pennsylvania Historical and Museum Commission, 2004 |