dsdata: Distance sampling workshop data

#' Ducknest line transect survey data
#'
#' Simulated line transect survey of duck nests, designed to reproduce the data of Figure 2 in Anderson and Pospahala (1970).
#'
#' The Monte Vista National Wildlife Refuge is in southern Colorado in the USA at an altitude
#' of roughly 2400m.
#'
#' @name ducknest
#' @aliases ducknest_units
#' @docType data
#' @format A data frame with 534 rows and 7 variables
#'   \tabular{ll}{
#'     \code{Region.Label} \tab strata names (single stratum in this instance) \cr
#'     \code{Area} \tab size of refuge (0 in this case, actual size 60km^2) \cr
#'     \code{Sample.Label} \tab transect ID \cr
#'     \code{Effort} \tab length of transects (km) \cr
#'     \code{object} \tab nest ID  \cr
#'     \code{distance} \tab perpendicular distance (m) \cr
#'     \code{Study.Area} \tab name of wildlife refuge \cr
#'   }
#' @references Anderson, D. R., and R. S. Pospahala. 1970. Correction of bias in belt transect studies of immotile objects. The Journal of Wildlife Management 34 (1): 141–146. https://doi.org/10.2307/3799501
#' @source Simulated data, from the distance sampling introductory course, Centre for Research into Ecological & Environmental Modelling, University of St Andrews.
#' @keywords datasets
#' @aliases ducknests_units
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