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Basic methodology descriptions can be found in i-Tree Landscape's references and the about i-Tree Design page.

The i-Tree Glossary is a good resources for those new to urban forestry. The information archive has detailed methodology documentation, notes, and links to technical papers.

International Use

International use is limited to locations where i-Tree Eco and associated secondary processing has been fully funded. For other locations, US national averages will be used as base data to compute tree benefits; your displaying of these estimates should indicate that they are only for demonstrative purposes.

The i-Tree Database site displays the i-Tree Eco supported locations.

As of 2024, the subset available is:

To reiterate, only i-Tree Eco locations that have that secondary processing funded and completed are available in i-Tree Engine.

At this time, all international locations are of beta status. Critical results should have samples compared to i-Tree Eco before publishing.