What is it?
What good is it?
- A tree inventory is a listing and description of trees and
- It can be sample, partial or complete, depending
on its purpose.
- It can be handwritten, typed, or computerized.
Any inventory is better than none, but computerized inventories are best
in the long run.
- Inventories permit better hazard reduction, budgeting, and
- A tree inventory is a powerful management tool because it:
- provides an overview of the ages, types, and condition
- allows you to make a maintenance schedule on a solid
- makes it easy to set priorities for pruning and
- is an excellent tool for budget planning and negotiation
- aids greatly in dealing with homeowners
- supplies guidelines for new tree selection
Tree inventory created by University
of Vermont Extension using Microsoft's Access®
What is it like?
How much does it cost?
- Every inventory includes at least address, species, size,
condition, hazard potential, and necessary maintenance work.
- A professional inventory is made by trained and experienced
professionals, now routinely using a computer program capable of advanced
data storage, analysis and reporting.
- A serviceable amateur inventory can be made by trained
non-professionals using a general spreadsheet such as Excel®
or a database such as Access®. Free downloadable inventories
of this type exist on the web. The information is commonly less detailed
and less accurate, hazardous trees must still be examined by a qualified
inspector, and many features of professional inventories will be missing.
- Field data can be collected on an inexpensive PDA,
greatly speeding up the process and making the data more consistent.
- All inventories need to be updated periodically through ground
inspection in order to stay current.
Where can I get more information?
- Cost depends upon who does the inventory, and how many trees
- The cost of a professional inventory will include the price
of the software, the number of trees, and the amount of data being collected
on each tree.
- The cost of an amateur inventory lies principally in the collection
of ground inspection data, since data entry can either be carried out
by existing staff or eliminated altogether through the use of PDAs..
James R. Fazio. [n.d.] "How to Conduct a Street Tree Inventory"
(Tree City Bulletin #23, National Arbor Day Foundation, 100 Arbor Ave,
Nebraska City NE 68410). Gene Olig and Robert Miller, 1997.
Guide to Street Tree Inventory Software". For other information,
advice and help on this topic, call offices of your State Urban Forestry
Coordinator or University Extension service, or visit urban forestry web