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Guided transect sampling

an outline of the principle

Lämås, Tomas and Ringvall, Anna and Ståhl, Göran (1997). Guided transect sampling. Umeå: (S) > Dept. of Forest Resource Management
(NL, NJ) > Dept. of Forest Resource Management
, Sveriges lantbruksuniversitet. Arbetsrapport / Sveriges lantbruksuniversitet, Institutionen för skoglig resurshushållning och geomatik ; 19
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Abstract

Guided transect sampling is primarily intended for the sampling of sparse, geographically
scattered, populations for which there exist no list of the units. Basically, it consists of a two­
stage design, using wide strips in the first stage and a subsampling procedure in each strip in
the second stage. The subsampling is guided by prior information, e.g. in the form of remote
sensing image data. Different strategies can be used for the guidance, resulting in different
probabilities of inclusion of population units, and consequently in slightly different
estimators.
The general principle for second stage subsampling guidance can be coupled with a
number of methods for how the samples should be selected along the "guided route". Strip
sampling, line transect sampling, adaptive cluster sampling, and plot sampling are examples
of methods that can be used. However, in the theoretical set-up of the method, it is assumed
that all objects in grid-cells passed by the survey transect are found. The grid-cells, covering
the entire area under study, also contain the covariate data that are used for directing the
sampling effort.

Authors/Creators:Lämås, Tomas and Ringvall, Anna and Ståhl, Göran
Title:Guided transect sampling
Subtitle:an outline of the principle
Series/Journal:Arbetsrapport / Sveriges lantbruksuniversitet, Institutionen för skoglig resurshushållning och geomatik (1401-1204)
Year of publishing :1997
Number:19
Number of Pages:9
Place of Publication:Umeå
Publisher:Institutionen för skoglig resurshushållning, Sveriges lantbruksuniversitet
ISSN:1401-1204
Language:English
Publication Type:Report
Full Text Status:Public
Agris subject categories.:P Natural resources > P01 Nature conservation and land resources
U Auxiliary disciplines > U10 Mathematical and statistical methods
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Plant production > Forestry
Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Landscape planning > Nature conservation and landscape management
Agrovoc terms:sampling, statistical methods, animal population, plant population, population density
Keywords:sampling, statistical methods, animal population, plant population, population density
URN:NBN:urn:nbn:se:slu:epsilon-e-542
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-542
ID Code:8882
Department:(S) > Dept. of Forest Resource Management
(NL, NJ) > Dept. of Forest Resource Management
Deposited By: Bo Jonsson
Deposited On:28 May 2012 12:23
Metadata Last Modified:02 Dec 2014 10:50

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