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Applications using estimates of forest parameters derived from satellite and forest inventory data

Reese, Heather and Nilsson, Mats and Sandström, Per and Olsson, Håkan (2002). Applications using estimates of forest parameters derived from satellite and forest inventory data. Computers and electronics in agriculture. 37:1, 37-55
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Abstract

From the combination of optical satellite data, digital map data, and forest inventory plot data, continuous estimates have been made for several forest parameters (wood volume, age and biomass). Five different project areas within Sweden are presented which have utilized these estimates for a range of applications. The method for estimating the forest parameters was a ”k-Nearest Neighbor” algorithm, which used a weighted mean value of k spectrally similar reference plots. Reference data were obtained from the Swedish National Forest Inventory. The output was continuous estimates at the pixel level for each of the variables estimated. Validation results show that accuracy of the estimates for all parameters was low at the pixel level (e.g., for total wood volume RMSE ranged from 58-80%), with a tendency toward the mean, and an underestimation of higher values while overestimating lower values. However, when the accuracy of the estimates is assessed over larger areas, the errors are lower, with best results being 10% RMSE over a 100 ha aggregation, and 17% RMSE over a 19 ha aggregation. Applications presented in this paper include moose and bird habitat studies, county level planning activities, use as input information to prognostic programs, and computation of statistics on timber volume within drainage basins and smaller land holdings. This paper provides a background on the kNN method and gives examples of how end users are currently applying satellite-produced estimation data such as these.

Authors/Creators:Reese, Heather and Nilsson, Mats and Sandström, Per and Olsson, Håkan
Title:Applications using estimates of forest parameters derived from satellite and forest inventory data
Series/Journal:Computers and electronics in agriculture (0168-1699)
Year of publishing :2002
Volume:37
Number:1
Page range:37-55
Publisher:Elsevier Science
ISSN:0168-1699
Language:English
Additional Information:The original publication is available at www.elsevier.com
Publication Type:Journal article
Refereed:Yes
Full Text Status:Public
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING
Keywords:Landsat, SPOT, kNN
URN:NBN:urn:nbn:se:slu:epsilon-1-72
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-1-72
ID Code:3332
Department:(S) > Dept. of Forest Resource Management
(NL, NJ) > Dept. of Forest Resource Management
Deposited By: Heather Reese
Deposited On:14 Aug 2008 00:00
Metadata Last Modified:02 Dec 2014 10:20

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