Figure 1. Overall trajectories (A) and spatial location (B) of trajectory-clusters from B.C.6000 to A.D.2000. Three was the optimal number of clusters according to the different quality criteria implemented in kml package (Genolini et al. 2015). In panel A, the X-axis represents the approximate year for which land use estimations are available in the KK10-model database, and Y-axis the proportion of land use (grid-cell proportion). Each grey line in panel A corresponds to a grid-cell on panel B. Legend (applicable for both panels) shows the proportion of grid cells assigned to each trajectory-cluster. Green color represents lowused areas; purple recently-used areas, and yellow steadily-used areas. Grey areas on the map show areas without historical land-use data. Map projection: Berhmann cylindrical equal area.
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