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Gallegos, Åsa, 2005. Design and evaluation of a computer aided calibration program for visual estimation of vegetation cover. Second cycle, A1E. Umeå: SLU, Dept. of Forest Resource Management

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Abstract

Compared to the number of field inventory programs that monitor change in vegetation with
visual cover estimations, very few studies have been conducted to show how accurate this
type of data is. In addition, no previous studies have determined whether efficient calibration
of field observers can improve such data. This study concerns the design and evaluation of a
computer program consisting of images of vegetation on which the true cover of vegetation
has been digitally calculated. The calibration consists of estimation with immediate feedback
of the true cover. The results show that even a short time of calibration greatly improves the
estimations and can also drastically reduce the influence of different backgrounds,
aggregation patterns and personnel experience.

Main title:Design and evaluation of a computer aided calibration program for visual estimation of vegetation cover
Authors:Gallegos, Åsa
Supervisor:Glimskär, Anders and Peterson, Hans and Walheim, Mats
Examiner:UNSPECIFIED
Series:Arbetsrapport / Sveriges lantbruksuniversitet, Institutionen för skoglig resurshushållning och geomatik
Volume/Sequential designation:142
Year of Publication:2005
Level and depth descriptor:Second cycle, A1E
Student's programme affiliation:Other
Department:(S) > Dept. of Forest Resource Management
(NL, NJ) > Dept. of Forest Resource Management
Keywords:Design, Evulation, Computer, Program, Estimation, Vegetation
URN:NBN:urn:nbn:se:slu:epsilon-s-1681
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-1681
Subjects:Forestry - General aspects
Surveying methods
Language:English
Deposited On:26 Sep 2012 13:47
Metadata Last Modified:08 Oct 2012 10:33

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