Welcome to the Distance project website
The Distance project provides software for the design and analysis of distance sampling surveys of wildlife populations. This software takes two forms: a Windows-based program and a suite of packages for the statistical programming language R.
The newest version of our R package
mrds (2.2.5), used for fitting detection functions by
Distance, has some improvements to its optimisation system. Here are some more details of recent changes and what you might need to watch out for.
mrds 2.2.5 and
Distance 1.0.3 are now on CRAN.
The University of St Andrews has been training ecologists and statisticians in design and analysis of distance sampling studies for decades. Perhaps you’ve wanted to attend but scheduling of workshops conflicted with your field work. 👨🌾
Introductory workshop, April 2021, registration open.
Our examples website has been updated to be easier to use.
The online course “Practical design and simulation to optimise distance sampling surveys” will run 15-17 March 2021.
The online course “Spatially explicit models for distance sampling data” will run 8-12 March 2021.
We are planning to offer a selection of introductory and more advanced/specialised workshops in 2021, via video conference. The first, on methods for when animals are missed at zero distance, will be on January 11-12, and registration is currently open.
Often ecological questions extend beyond simply wanting an estimate of density in a study region. It is common for inference to extend to differences in density over time or space. A function to assess the significance of differences in density estimates exists in our examples library.
New versions of the
mrds R packages are now available on CRAN. Thanks to all those who have taken the time to contact us and help out by reporting unusual behaviour or requesting features.