Urban density

It is necessary for each object of the city to build a buffer zone of the appropriate size, in meters (the zone includes playgrounds, garages, etc.), then calculate the area of intersection of buffer zones and calculate on their basis the density of development for the area (4 districts), for the neighborhood and for the zones. It is required to be implemented in QGIS/ArcGIS. Visualize the result on the map. For the city of Tomsk.