Skip to Main Content
Digital terrestrial photogrammetric methods for tree stem analysisAuthor(s): Neil A. Clark; Randolph H. Wynne; Daniel L. Schmoldt; Matt Winn
Source: In: Hansen, Mark; Burk, Tom, eds. Integrated tools for natural resources inventories in the 21st century. Gen. Tech. Rep. NC-212. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station. 353-363.
Publication Series: General Technical Report (GTR)
Station: North Central Research Station
PDF: View PDF (848.96 KB)
DescriptionA digital camera was used to measure diameters at various heights along the stem on 20 red oak trees. Diameter at breast height ranged from 16 to over 60 cm, and height to a 10-cm top ranged from 12 to 20 m. The chi-square maximum anticipated error of geometric mean diameter estimates at the 95 percent confidence level was within ±4 cm for all heights when obtained at a distance of 12 m or greater. Error increased with increased stem height from ±3 to ±7 cm for heights from 1 to 20 m. In general, the error is equivalent to three times the instrument precision, which varies with distance. Two-thirds of the volume estimates were within 8 percent of "actual" volumes.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationClark, Neil A.; Wynne, Randolph H.; Schmoldt, Daniel L.; Winn, Matt 2000. Digital terrestrial photogrammetric methods for tree stem analysis. In: Hansen, Mark; Burk, Tom, eds. Integrated tools for natural resources inventories in the 21st century. Gen. Tech. Rep. NC-212. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station. 353-363.
- An assessment of the utility of a non-metric digital camera for measuring standing trees
- Short-term effects of prescribed fire on mixed oak forests in the southern Appalachians: vegetation response
- Effects of herbicide release on the growth of 8- to 12-year-old hardwood trees
XML: View XML