Relief shown by contours and spot heights. "Compiled by photogrammetric methods from imagery dated 1966; topography partly by planetable surveys 1967; revised from imagery dated 1991 ... field checked 1993; map edited 1994." Includes quadrangle location map and index to adjoining quadrangle names. "42096-D5-TF-024." "DMA 6668 I NE--Series V875."
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.