Interesting looking tools from USDA; worth looking more into. We could all use more trees in our cities and these tools help show why (if you where ever in doubt).
i-Tree is a state-of-the-art, peer-reviewed software suite from the USDA Forest Service that provides urban and community forestry analysis and benefits assessment tools. The i-Tree tools help communities of all sizes to strengthen their urban forest management and advocacy efforts by quantifying the environmental services that trees provide and the structure of the urban forest.
Developed by USDA Forest Service and numerous cooperators, i-Tree is in the public domain and can be downloaded for free