UrbanCrowns is a Microsoft® Windows®-based computer program developed by the U.S. Forest Service Southern Research Station. The software assists urban forestry professionals, arborists, and community volunteers in assessing and monitoring the crown characteristics of urban trees (both deciduous and coniferous) using a single side-view digital photograph. Program output includes estimates of tree height and length as well as crown height, diameter, ratio, volume, density, and transparency. This paper gives an overview of the UrbanCrowns program with a more detailed discussion on the crown volume output and its potential to aid in quantifying functions and benefits of urban trees.
Winn, Matthew F.; Lee Bradley, Sang-Mook; Araman, Philip A. 2010. Urban Crowns: crown analysis software to assist in quantifying urban tree benefits. In: Laband, D.N., ed. Emerging Issues Along Urban/Rural Interfaces III: Linking Science and Society: Conference proceedings. Atlanta, GA: Auburn University Center for Forest Sustainability. p.86-91.