special job cover map
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special job cover map[′spesh·əl ¦jäb ′kəv·ər ‚map]
A small-scale map used to record progress on photographic reconnaissance tasks covering very large areas; as each portion of the task is completed, the area covered is outlined on the map.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.