Title: Estimating uncertainty in map intersections
Author: McRoberts, Ronald E.; Hatfield, Mark A.; Crocker, Susan J.
Source: In: McRoberts, Ronald E.; Reams, Gregory A.; Van Deusen, Paul C.; McWilliams, William H., eds. Proceedings of the eighth annual forest inventory and analysis symposium; 2006 October 16-19; Monterey, CA. Gen. Tech. Report WO-79. Washington, DC: U.S. Department of Agriculture, Forest Service. 289-296.
Publication Series: General Technical Report (GTR)
Description: Traditionally, natural resource managers have asked the question "How much?" and have received sample-based estimates of resource totals or means. Increasingly, however, the same managers are now asking the additional question "Where?" and are expecting spatially explicit answers in the form of maps. Recent development of natural resource databases, access to satellite imagery, development of image classification techniques, and availability of geographic information systems has facilitated construction and analysis of the required maps. Unfortunately, methods for estimating the uncertainty associated with map-based analyses are generally not known, particularly when the analyses require maps to be combined. Motivated by the threat of the emerald ash borer in southeastern Michigan, the number of ash trees at risk was estimated by intersecting a forest/non-forest map and an ash tree distribution map. The primary objectives of the study were to quantify the uncertainty of the estimate and to partition the uncertainty by source. An important conclusion of the study is that spatial correlation - an often ignored component of uncertainty analyses - made the greatest contribution to the uncertainty in the estimate of the total number of ash trees.
- 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.
- This publication may be available in hard copy. 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.
XML: View XML
McRoberts, Ronald E.; Hatfield, Mark A.; Crocker, Susan J. 2009. Estimating uncertainty in map intersections. In: McRoberts, Ronald E.; Reams, Gregory A.; Van Deusen, Paul C.; McWilliams, William H., eds. Proceedings of the eighth annual forest inventory and analysis symposium; 2006 October 16-19; Monterey, CA. Gen. Tech. Report WO-79. Washington, DC: U.S. Department of Agriculture, Forest Service. 289-296.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility