A crude measure of household overcrowding

Next up on my Census challenge is the number of usual residents per household. I decided to look at the ratio of the average number of usual residents per household to the average number of bedrooms per dwelling, by meshblock for 2013.

As a very crude measure of household overcrowding, I’ve mapped the meshblocks in which this ratio is greater than one. It’s a crude measure because I don’t have data for individual households and dwellings, so I can only work with the meshblock averages.

With that caveat in mind, here’s the map for Auckland (click to see a bigger one):

And Wellington:

And Christchurch: