Metric Standard, in previous years called “Metric Scale”, is especially suitable for forestry conditions of temperate climates with tree diameters of up to 80 centimeters, and is especially marked for measuring heights from the standard distances of 15, 20, 25 or 30 meters as introduced in general practice in certain regions.
Wide Scale, also called “virgin forest scale”, is a special scale developed for the measurement of large tree diameters at different heights, for angle-count sampling with large basal-area factors, and for simple surveying purposes.
Metric CP combines the functions of the Metric Standard and Wide Scale scales. For this reason, it is a very versatile choice.
The American Scale has functions analogous to Metric Scale, but the measurements are given in the American forestry dimensions of feet and inches.
A comparison between the possibilities of the different scales, see Table.