1:400,000 Scale Map Ruler
Price: $4.95
The following map scales are used on various topo maps to locate exact latitude and longitude coordinates for any spot on the map. The various scales are outlined below with a description of the USGS and DELORME maps that they will work on. Each of these individual map scales can be used to locate either latitude-longitude or UTM coordinates. They are packaged in a protective plastic case with detailed instructions.