Document Type
Article
Publication Date
1-2015
Abstract
Tree height is a critical variable of forest inventory assessments, and estimating the height of trees has been a component of forest inventory assessments for decades. The actual tree height of 60 open-grown baldcypress (Taxodium distichum) trees measured with a telescopic height pole were compared to Pictometry hyperspatial 4-in. multispectral imagery estimated tree height on the campus of Stephen F. Austin State University, Nacogdoches, Texas. Linear correlation coefficients (r) between actual tree height and Pictometry-estimated tree height for all 60 trees and the shortest 30 and tallest 30 trees were [1]0.997 for all r values. Pictometry estimated tree height was within, on average, 1.77, 2.15, and 1.40% of actual tree height for all 60 trees, the shortest 30 trees, and the tallest 30 trees, respectively. All three paired t-tests, for all 60 trees, the shortest 30 trees, and the tallest 30 trees, resulted in a P value [1]0.08, indicating that there was no statistical significance between actual and estimated tree height at a 95% confidence level. Pictometry-estimated tree height can be used in lieu of field-based tree height estimation for open-grown urban forests.
Repository Citation
Unger, Daniel; Kulhavy, David; Williams, Jeffrey M.; Creech, David; and Hung, I-Kuai, "Urban Tree Height Assessment Using Pictometry Hyperspatial 4-Inch Multispectral Imagery" (2015). Faculty Publications. 45.
https://scholarworks.sfasu.edu/spatialsci/45
Comments
Originally published in Journal of Forestry 113(1): pages 7-11
Posted with permission from the Society of American Foresters http://dx.doi.org/10.5849/jof.14-020