Michael Rahnis

GIS Research Specialist

Current Projects

Historic Maps and Atlases

• United States Census of 1840: Map of mill density by county
• Dams located from historic maps of Baltimore County, Maryland
• Dams located from historic maps of Montgomery County, Maryland
• Dams located from historic atlases of Centre County, Pennsylvania
• Dams located from historic atlases of Chester County, Pennsylvania
• Dams located from historic atlases of Huntingdon County, Pennsylvania
• Dams located from historic atlases of Lancaster County, Pennsylvania
• Dams located from historic atlases of York County, Pennsylvania

Documents

• [pdf:5.7 MB] Buried Holocene streams and legacy sediment: Late Pleistocene to historical changes in stream form and process and implications for stream restoration, mid-Atlantic Piedmont region
• [pdf:21.1 MB] Stafford C. Happ, Gordon Rittenhouse, and G. C. Dobson, Some Principles of Accelerated Stream and Valley Sedimentation, Technical Bulletin (Washington DC: U.S. Department of Agriculture, May 1940).

Contact

Tel: 717-358-4750
Fax: 717-291-4186
email: michael.rahnis@fandm.edu