The tag uses the field to power up and transmit its ID back to the reader. The tree grows up from the top and around the tag assuring a predictable reading height. Track trees from seedlings, including genetic information Over 1 billion seedlings per year in the U.S. Reader sends out a signal, tag is passive and only reflects the readers signal. Each tag is a unique number. This number is used as a key in the database to track tree information such as originating nursery, type of tree, planter, and even GPS location.
Some laser pulses reach the forest floor, others reflect from understory and canopy.
Measurements can be carried out at the scale of an individual tree. Allows for detailed modeling of terrain surface. Much higher resolution then previously possible with remotely sensed data. The Precision Forestry Home Page is provided by the College of Forest Resources.