Clear mylar overlay help expedite the recording of sample localities during both field and office work. These overlays allow for fast and accurate measurement of latitudes and longitudes. Presented here is a booklet computer-generated overlays at scales of 1:63,360 and 1:250,000 between the latitudes of 49?00'00'' N. or S. to 71?30'00'' N. or S. Copies of individual overlays are available from the U.S. Geological Survey Open-File Services Section, Branch of Distribution, USGS, Box 25425, Denver Federal Center, Denver, Colo., 80225, telephone (303) 234-5888.
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USGS Numbered Series
Clear mylar templates used to measure latitude and longitude of sample localities at scales of 1:63,360 and 1:250,000 between the latitudes of 49 degrees and 71 degrees 30 minutes north or south