Housing Circles for Ottawa-Gatineau
Continuing the Food Circles theme, I've done a similar study for housing. The Housing Circles below represent the size of a solid cylindrical building of varying heights needed to provide 1000 square feet of housing for each person in the Ottawa-Gatineau Metropolitan area. this isn't a suggestion to put everyone into a single monolithic structure, but should illustrate the land use efficiency of varying numbers of floors for a relatively generous per-capita living space. I should note there's no space accounted for for any other land use such as transportation, retail, or industry.