bookmark PrAGMATiC / Probabilistic And Generative Model of Areas Tiling the Cortex Provides a detailed semantic atlas. PrAGMATiC determines where functional areas appear on the cortical sheet and determines how the cortical map is produced from an arrangement of areas. It can be modified to model functional gradients explicitly. The tool can be used for determining whether the semantic maps found here are best described as homogeneous areas or as gradients. It is based on a Voronoi diagram that must assign an area to every point on the cortex.