Landscapes have been generated using a T-tesselation algorithm.
The format is a formal class 'SpatialPolygons' [package "sp"].
Details
The landscape structure is simulated using a T-tessellation algorithm (Kiêu et al. 2013) in order to control specific features such as number, area and shape of the fields.
References
Kiêu K, Adamczyk-Chauvat K, Monod H, Stoica RS. A completely random T-tessellation model and Gibbsian extensions. Spat. Stat. 2013;6:118-38. doi: http://dx.doi.org/10.1016/j.spasta.2013.09.003.