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'''Distance sampling''' is a widely used group of closely related methods for estimating the [[population density|density]] and/or [[abundance (ecology)|abundance]] of [[population]]s. The main methods are based on line [[transect]]s or [[point transect]]s.<ref>Buckland, S. T., Anderson, D. R., Burnham, K. P. and Laake, J. L. (1993). ''Distance Sampling: Estimating Abundance of Biological Populations''. London: Chapman and Hall. {{ISBN|0-412-42660-9}} [http://www.colostate.edu/Dept/coopunit/download.html Online version] {{webarchive|url=https://web.archive.org/web/20160417122707/http://www.colostate.edu/Dept/coopunit/download.html |date=2016-04-17 }}</ref> In this method of sampling, the data collected are the distances of the objects being surveyed from these randomly placed lines or points, and the objective is to estimate the average density of the objects within a region.<ref>Everitt, B. S. (2002) ''The Cambridge Dictionary of Statistics'', 2nd Edition. CUP {{ISBN|0-521-81099-X}} (entry for distance sampling)</ref>
== Notes ==
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