Vector fields as a framework for modelling the mobility of commodities
Fig 8
Sinks (A) and sources (B) in the cattle trade vector field.
Initial vector fields were generated from cattle trades in each season of 2016. A triangle-based interpolation method is used to generate a continuous vector field from these initial vectors. Critical points within the field are identified, distinguishing attracting points (sinks) from repelling points (sources). Circles indicate the locations of these points, with larger circles used for individual points to enhance visualisation, and darker shading representing higher numbers of points. The boundary maps shown in this figure are freely available (not copyrighted) [37].