Specifying the tree protection zone

The tree protection zone is the area around the tree that should be fenced off, or preserved, to protect the tree. The tree protection zone moves with the tree trunk location. The zone can be irregular or circular; irregular zones can be reshaped. The TPZ Area displays the calculated area for the entire tree protection zone.

From the Object Info palette of a selected existing tree, select the type of Tree Protection.

Zone	Description
None	Does not display a tree protection zone
Display Irregular Zone	Displays the tree protection zone as an irregular shape which can be reshaped to represent the zone
Edit Irregular Zone	Allows an irregular zone to be reshaped as described below
Display Circular Zone	Displays the tree protection zone as a circle around the tree trunk; set the circle radius with TPZ Radius
Display using 12x DBH	Displays a circular tree protection zone that is calculated based on 12 times the diameter at breast height (DBH) parameter

An irregular tree protection zone may need to extend beyond the initial boundary shape. To reshape the tree protection zone:

2. Drag the handles to reshape the zone. Adjust the radius at the corners of the zone with the TPZ Cnr Radius value, which only displays during zone editing.

3. When reshaping is finished, select Display Irregular Zone from the Tree Protection parameter.