Simulated line transect data with large differences in transect length.
systematic_var_2 that transect length gradient is coupled with a
strong animal gradient; exaggerating encounter rate variance between transects.
data.frame with 253 observations of 7 variables:
||stratum label (default)|
||stratum area (0.5 km^2)|
||transect length (km)|
||perpendicular distance (m)|
||name of study area|
True population size is 1000 objects in the study area of size 0.5 km^2; such that true density is 2000 objects per km.
Data structure for
systematic_var_2 is identical, but there are
256 observations and a strong animal gradient.
Fewster, R.M., S.T. Buckland, K.P. Burnham, D.L. Borchers, P.E. Jupp, J.L. Laake and L. Thomas. (2009) Estimating the encounter rate variance in distance sampling. Biometrics 65 (1): 225–236. https://doi.org/10.1111/j.1541-0420.2008.01018.x.
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