Geospatial Data - 35 of 35
Geospatial Data FAQs - 35 Found
Through time, policies have changed regarding whether or not a full UTM grid would appear on the 7.5-minute map series. Beginning in the mid 1950's, the grid was indicated by blue ticks around the map at 1000 meter spacing. In 1979, the ticks were replaced with a full-line black UTM grid. Because so many complaints were received through a 1991 user survey, the full grid was removed in early 1992 and blue ticks returned to the maps. In 1994, another survey indicated that either a complete grid or internal 1000 meter ticks were the preferred treatment as opposed to the perimeter ticks alone. A full grid appears on the most recently printed 7.5-minute maps with the exception of single edition quadrangles published cooperatively with the U. S. Forest Service.