From the air: the aerial photographic record

The aerial record of this ground begins, as most American farmland's does, with the federal farm flights of the late 1930s. The USGS EROS Aerial Photography Single Frame collection — over 6.4 million frames from federal organizations, dated 1937 to the present, the USGS's own holdings running from April 1937 — is the national archive of that photography, and the Indiana Geological Survey's Historical Aerial Photo Index georeferenced the state's photomosaic index maps into 951 county-based images dating from the 1930s to the 1980s, locating 113,016 individual Indiana frames, 39,992 of them in the IGS archive itself. The USDA's Aerial Photography Field Office catalogue carries the county-by-county flight record behind the EROS frames — the FSA and NRCS black-and-white coverage flown county by county from the 1950s forward, with pre-1955 imagery referred to the National Archives. Locally, the SJCPL map case holds a dedicated run of St. Joseph County aerial photographs. The record turns from frames to seamless imagery with the 1998 statewide digital orthophotography (USDA NRCS / Farm Service Agency and USGS; one-metre black-and-white, distributed by Purdue by county — St. Joseph County shares its disc with Elkhart and Lagrange), then the 2005 Statewide Color Orthophotography Project, which flew the whole state plus a 1,000-foot buffer and delivered one-foot county mosaics of this county through the Indiana Spatial Data Portal. The state's Geographic Information Office now manages the imagery as a standing series dating back to 2005, flown on a four-year cycle in county tiers — St. Joseph County in the central tier — with the 2025–2028 programme (Woolpert, contracted January 2025) collecting four-band, six-inch orthoimagery statewide. Between the 1930s frames and the six-inch orthos, the whole transformation of this ground — field, farm lane, subdivision, corridor — exists as photography, and the Granger that no mapmaker drew from a balloon was photographed from the air, completely, for ninety years.

Sources: USGS EROS, Aerial Photo Single Frames collection record (1937–present; 6.4M frames; DOI 10.5066/F7610XKM); Indiana Geological Survey, Development of the Indiana Historical Aerial Photo Index (951 county images, 1930s–1980s; 113,016 frames; IGS archive 39,992); USDA FSA Aerial Photography Field Office imagery catalogue (county listings; pre-1955 referral to NARA); Purdue / USDA, Indiana 1998 Digital Orthophotography (St. Joseph–Elkhart–Lagrange disc); 2005 Statewide Color Orthophotography Project record and IU ISDP county status (St. Joseph, 1-ft mosaic); Indiana GIO statewide imagery catalogue (series from 2005; four-year tier cycle) and the 2025–2028 IGIO programme (Woolpert award, Jan 2025); SJCPL map case (St. Joseph County aerial photographs).