Maps are an extremely valuable resource for understanding agricultural information. Maps can provide information on numbers as well as ages of historic farms and farmsteads in an area, and can also be used to take a look at larger trends across and between counties and the rest of the commonwealth. The census maps were created from original agricultural census manuscripts, compiled down to the township level and mapped.
1850 Census Maps
1880 Census Maps
1927 Census Maps
Historic maps can be helpful in documenting an historic farm or farmstead. A company called Maptech has created a website which contains historic USGS topographic maps that can be found by town name, as well as quadrant.
Feel free to browse historic aerials through the Penn Pilot Project, which is provided by Pennsylvania State University, DCNR, and the Pennsylvania Historical and Museum Commission. The photos date from 1937-1970, and are available for download as needed. For more information, please read the instructions at the Penn Pilot website: http://www.pennpilot.psu.edu/
Armagh Township, Mifflin County