Fig. 1

Elements of the dasymetric population mapping workflow. (a) Block group population estimates for south-central Anne Arundel County, Maryland (boundaries between block groups shown in white). (b) Impervious surface area (30 m) from the NLCD. (c) Impervious surface classification, showing roads and non-road areas. (d) The final population map, with population distributed across non-road impervious surface area and all Census blocks with zero population removed.