MapTools Ruler Set For Delorme Atlas & Gazetteer

This ruler set was designed to be used with the DeLorme Atlas & Gazetteer for Texas. It contains 13 ruler pairs for measuring latitude longitude coordinates at latitudes ranging from 25° to 37° on a map with a scale of 1:400,000. It also contains rulers for measuring statute miles and kilometers. The pages of the atlas have a printed lat/lon grid shown with thin black lines. The lines are marked with their values just outside of the edges of the map, in a degrees, minutes and seconds format and in decimal degrees. Longitude rulers used north of their design parallel of latitude, will be too long to fit the grid.