aerial photo (black and white)

http://www.co.delaware.pa.us/planning/gisinfoservices/areials.html

This is an aerial (overhead) black and white photography of an area in Delaware County, Pennsylvania. I found the website pretty interesting because they had the same aerial view photographed once in 1960 and then again 40 years later, in 2000. I used the most recent photo, taken in 2000.