I was recently invited to Deakin University, Melbourne, Australia, by Professor Brett Bryan to give a course on **land use modelling in R** using the SIMLANDER/APoLUS framework to the Land Use Futures modelling group.

Seemed to go down well, students were very engaged and got on well with the model. Fun had by all, including me.

One bright participant noticed a stupid error in the accessibility calculation. This can be summarized as follows:

1. I’d mistyped White’s et al’s (1997) accessibility equation. The correct equation is to be found here on the updated accessibility page of this website.

2. I was entirely wrong about the way to put the coefficient into the equation. It’s a single number, not a reclassified distance map. Of course, if you don’t want to use the accessibility equation, you can of course, reclassify the distance map. But not both!

The correct procedure is described as follows here

Over the coming days I will correct this error in the script in SIMLANDER and APOLUS, and post an update when I do this…..