Why don USGS maps show the UTM grid?
Through time, policies have changed regarding whether or not a full UTM grid would appear on the 7.5’ map series. Beginning in the mid 1950’s, the grid was indicated by blue ticks around the projection 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. 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. Once again, a full grid will appear on the 7.5’ series with the exception of single edition quadrangles published cooperatively with the U. S. Forest Service. 5. How are UTM coordinates measured on the quadrangle? UTM coordinates are measured on the map by subdividing the 1000 meter grid squares into tenths or hundredths. This will narrow down the coordinate to a 100 or 10 meter square. Usually the mea
