Compatibility: The scaled map is suitable for use with MGRS, USNG or other meter-based coordinate systems. 3 Types of Scale: Coordinate scale protractor is widely used by military forces and navigators to mark the measured map, for use on maps with scales of 1:25000 1:50000 1:100000 1:250000. Easy to Read: Topographic map scale is read in both degrees and mils. Clear printing makes it easy to read the value. High-quality materials: The transparent coordinate scale is made of high-quality plastic materials, durable and sturdy, wear-resistant, anti-fall, and can be used for a long time. Measurements: 12.7 x12.7 cm.