Figure 1From: Epidemiological geomatics in evaluation of mine risk education in Afghanistan: introducing population weighted raster mapsLayers in a population-weighted raster, based on a cluster sample. a) position of sentinel sites or "tent-poles", b) population weights, c) friction layers and d) raster drape (top) where the shade is set by the height of the tent-pole and the extension of an interpolation based on the population weights.Back to article page