i-Tree is a suite of several different applications that focus on the benefits of urban trees; many specifically address the carbon and greenhouse gas emissions benefits of urban trees. In general, each of these applications requires the user to define a study area (residential home, neighborhood, city, county, etc.). It then uses field inventory & sampling data and/or land cover data to calculate tree and forest structure and the benefits that trees provide. Reports inform users how neighborhood trees contribute to carbon sequestration, building energy savings (through shading and/or blocking wind), air quality improvements, and storm water interception. Some applications assist users in summarizing and evaluating the structure of their urban tree communities and examine management needs.
The original i-Tree suite of tools was launched in 2005 with two urban forest assessment applications. It has since been through many updates and improvements; the 2017 release features a desktop suite and 8 different web applications.
USDA Forest Service in cooperation with several partners