These rulers can be utilized to measure or plot latitude/longitude coordinates, UTM/MGRS/USNG coordinates, and to measure distances in either meters or miles. You’ll find them useful if you find yourself working with a GPS receiver and paper maps.
Every ruler is designed for a specific scale map. You will have to use a ruler that fits the dimensions of your map.
At the front side, the rulers have minutes and seconds on one edge and decimal minutes At the other edge, allowing you to make use of either notation. At the back side, the rulers have distance in meters on one edge, and distance in miles At the other edge. Latitude is measured immediately with the ruler. But, since a degree of longitude covers a shorter distance as you move towards the poles, the ruler is used on a diagonal to measure longitude.
The rulers are printed on a sturdy 20mil white plastic stock for durability.
1:25,000 x 2.5 minutes
Latitude Longitude in minutes and seconds and decimal minutes
Distance in Miles
Distance in Kilometers