Ground Measurement
Each tree’s measurements are used to calculate the area projected by the crown onto the ground. Summing the crown areas for all trees measured on a fixed plot area and dividing by the ground area will give the crown closure. The "moosehorn" crown closure estimator is a device for measuring crown closure from the ground. Other methods for estimating crown closure include the use of line-intercept, spherical densiometer, and hemispherical photography. Exact cover measurements should be made in vertical direction, or the cover percent will be overestimated.
Read more about this topic: Crown Closure
Famous quotes containing the words ground and/or measurement:
“My ground is the Bible. Yea, I am a Bible-bigot. I follow it in all things, both great and small.”
—John Wesley (1703–1791)
“That’s the great danger of sectarian opinions, they always accept the formulas of past events as useful for the measurement of future events and they never are, if you have high standards of accuracy.”
—John Dos Passos (1896–1970)