How Do You Rate This Publication?       

Title:	Generating Continuous Surface Probability Maps from Airborne Video Using Two Sampling Intensities Along the Video Transect
Author(s):	Jacobs, Dennis M.; Cooke, William H., III
Date:	2000
Source:	Res. Pap. SRS-22.Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. 7 p.
Station ID:	RP-SRS-022
Description:	Airborne videography can be an effective tool for assessing the effects of catastrophic events on forest conditions. However, there is some question about the appropriate sampling intensity to use, especially when trying to develop correlations with probabilistic data sets such as are assembled through the Forest Inventory and Analysis (FIA) surveys. We used airborne videography to assess damage to forest resources by Hurricane Andrew and the catastrophic February 8-l 1, 1994, ice storm; but, those efforts were limited by the absence of a direct link between video imagery and FIA field plots. In this study, we used the 1994 ice storm in northern Mississippi to test bias and accuracy at two sampling intensities-14.5 by 14.5-km spacing (square) and a 14.5- by 1.6-km spacing (rectangular). Results showed that the square pattern resulted in less biased estimates of damage. We suggest that this bias would be lessened further if sampling was made on the 4.8~km sample grid of FIA data points. We assert that bias could be eliminated if imagery was acquired directly over FIA plots.
	View and Print this Publication (752 KB)
Pristine Version:	An uncaptured or "pristine" version of this publication is available. It has not been subjected to OCR (Optical Character Recognition) and therefore does not have any errors in the text. However it is a larger file size and some people may experience long download times. The "pristine" version of this publication is available here: View and Print the PRISTINE copy of this Publication (1.5 MB)
Publication Notes:	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. Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact the SRS Webmaster, srswebmaster@fs.fed.us if you notice any errors which make this publication unuseable. You may send email to pubrequest@fs.fed.us to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)
	Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility