The aerial layer is aerial photography that has been adjusted for the curvature and elevation of the earth.
The cities of McPherson, Lindsborg, Galva, Moundridge, and Inman use photography flown in 1998.
Roxbury, Marquette, and Windom use photography flown in 1986.
Canton, and rural areas use photography flown in 1991.
The aerial layer presented is a combination of this photographic material.