i-Tree Methods Documentation, Model Notes, & Technical Papers

For foreign language materials, please see our International Documents.

Para materiales traducidos, consulte los Documentos Internacionales.

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i-Tree Suite General

  • Science Change Log - A running outline of changes made to the science behind the i-Tree tools
  • New Carbon Equations and Methods, 2021
  • i-Tree Species List - Users looking for the latest i-Tree species list should download it directly from the View tab within i-Tree Eco. The online tools generally use a subset of this species list that may eliminate certain shrubs or be regionally specific. The species list is regularly updated within i-Tree Eco and the version provided here may be out of date. This version was downloaded on January 17, 2023.
  • i-Tree Version Updates - Current software versions and the i-Tree desktop change log document.
  • Click here to see changes to the software not related to a software version update. (coming soon)

i-Tree Eco

i-Tree Database

i-Tree Database provides a central submission site for new location-specific data coming into i-Tree from around the world. Submitted data will be vetted and officially added to i-Tree Eco and potentially other tools in the future. Users in these new locations will be able to update their software and run an analysis with new locations and species without requiring manual processing by the US Forest Service. Below are some files that are used in the data submission process with i-Tree Database.Refer to the i-Tree Database Help section for guidance on how to use these resources.

i-Tree Canopy

i-Tree Design

  • iTree Design Methods - An updated summary describing methods and processes used in the i-Tree Design v6 application. Updated September 2014.
  • Design Application Notes - A summary of the i-Tree Design application "About" notes describing the model. Similar information can be accessed directly from the Design application.

i-Tree Landscape

i-Tree Hydro

Please be advised that development has stopped for this tool, as we focus on its underlying model as part of Hydro+ in the i-Tree Research Suite. The following Hydro resources still apply to certain aspects of Hydro+ and to the last release of the Hydro Graphical User Interface (GUI) which is available in the i-Tree installer.

i-Tree Tools Metadata

The following documents summarize the data used to perform the batch runs of i-Tree Eco that are used to create benefits multipliers (or base values) used in i-Tree Canopy, i-Tree Landscape, i-Tree Design, i-Tree Planting, MyTree, and OurTrees.

US locations: Alaska, Hawaii, Puerto Rico, and US Virgin Islands.

International locations: Canada, Colombia, Mexico, and Europe.

i-Tree Pest Detection

i-Tree Species Resources

  • i-Tree Species Methods - A detailed document describing the methodology of the i-Tree Species selector utility.

Legacy Tool Resources

i-Tree Streets & STRATUM

Documents for STRATUM also pertain to i-Tree Streets as Streets is an adaptation of the original Street Tree Resource Assessment Tool for Urban Forest Managers (STRATUM) application.

i-Tree Vue

i-Tree Storm SDAP (Storm Damage Assessment Protocol)

MCTI (Mobile Community Tree Inventory)