Abney Level, Clinometer, Topographic Map Quadrangle, GPS Receiver, Diameter Tape
Courtesy of Ohio State University Extension

The tools displayed here are used to collect basic data about forests and their management. The foundational information needed is the tree species, diameter, height, and condition. Measuring the growth rate is also important in many aspects of forest research and management. The instruments have changed over time, but the information required and collected has stayed much the same.