Aerial Photo Source:
Boone County Assessor, Ortho-rectified
Digital Imagery - 2015, 2011, 2007, 2002 & City of Columbia 2017 (metro area).

Historic Aerial Photo Sources:
Boone County Assessor, in-house rectified mylar and
photo imagery - 1994, 1992, 1980, 1977, 1968, 1962, 1956, & 1939 from various sources.
Photo imagery for 1992, 1977, & 1939
are not available County-wide.

Elevation Sources:
Boone County Assessor and City of Columbia Public Works - 2015.

Planimetrics Sources:
Boone County Assessor 2015 & 2009 and City of Columbia Public Works - 2007.