Main Page/Research/Smart Maps/dwelling units

Create a smart map raster that represents the count or density of dwelling units

1. In Access (for faster processing)
   1. decide on a cell size in advance
      1. if the cell size is 10 m, then the area of the cell is 100 m² = 1076 ft²
   2. prepare parcel data with number of dwelling units per parcel (I used precision 18 scale 10)
   3. add a field for du_per_[cell] (e.g., du_per_10m_cell)
      1. calculate as dwelling_units * conversion / shape_area

         e.g., for 10 m² cells, the conversion will be 1076

         to give the number of dwelling units per cell²

2. In ArcGIS (for spatial operation)
   1. convert to raster at 10 m spacing (32.808 ft), call it [du_per_cell]
   2. convert the raster to points

      now there is a data set of points where each point has the value of the number of dwelling units per cell/point

   3. simple density moving window analysis with 833 m (2734 ft) radius and population field = grid_code, units square meters (call this grid simple_dens)
   4. multiply simple_dens by the radius area to obtain focal count (following this analysis, [simple_dens] * sqr (833) * pi