Spatial Units
From a geospatial perspective, this mosaic is less problematic. Here the amount of rubles or poods is matched to the body of water along which the goods moved. Rather than imply that trade on the Kama was as important to someone living in Iurty Tonkovy as it was to someone in Solikamsk (purely by virtue of the fact that both settlements fall within the boundaries of Perm province), this data implies that it was as important to someone living in Cherdyn as it was to someone living in Elabuga.