Relief shown by contours and spot heights. "Compiled from USGS 1:24 000-scale topographic maps dated 1956-1976 ... Planimetry revised from aerial photographs taken 1983 ... Map edited 1986." Alternate title: Polk Co., Iowa. Includes location map/sheet index, index to topographic maps, location map, and meters/feet conversion table. "41093-E5-CF-100."
System requirements: An 80386 IBM compatible computer with MS-DOS version 3.1 or later, and 640K of RAM, and a CD-ROM reader using Microsoft Extensions, version 2.0 or later. Relief shown by contours and spot heights. Title from disc label. Shipping list no.: 94-0011-E. "Mastered 2/94." "Monochrome 1-meter pixels"--Container insert. "ISO 9660, JPEG compressed data." FFD. 8 coded a temporarily. 2 copies