Relief shown by contours and spot heights. "Topography by photogrammetric methods from imagery dated 1961 and planetable surveys 1963; revised from aerial photographs taken 1990-91; field checked 1993; map edited 1994." Includes quadrangle location map and index to adjoining quadrangles. "42096-E4-TF-024." "DMA 6769 III SW--Series V876."
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.