CYA Military Scale Corner Ruler

This corner ruler has 3 different scales printed on it, suitable for 1: 24,000 / 1: 25,000 / 1: 50,000 scale maps. The bottom edge is placed on the bottom of the map grid, making it easy to align the tool parallel to the grid lines. The 1:24,000 and 1:25,000 corners allow you to divide a 1km map grid to a 10m precision. The 1:50,000 corner allows you to divide a 1km map grid to a 20m precision.