Commuting between districts and cities in New Zealand
At this year’s New Zealand Statisticians Association conference I gave a talk on Modelled Territorial Authority Gross Domestic Product. One thing I’d talked about was the impact on the estimates of people residing in one Territorial Authority (district or city) but working in another one. This was important because data on earnings by place of residence formed a crucial step in those particular estimates of modelled GDP, which needs to be based on place of production. I had a slide to visualise the “commuting patterns”, which I’d prepared for that talk but isn’t used elsewhere, and thought I’d share it and a web version here on this blog.
The web version is the one in the frame above this text. It’s designed to be interacted with – try hovering over circles, or picking them up and dragging them around.
Data
The source data for this come from 2013 Census and are published by Statistics New Zealand, who have their own rather nifty map-based visualisation. The data are published on the visualisation’s information page and it’s easy to grab the CSV and tidy it up in R:
library(dplyr)
library(tidyr)
library(showtext)
library(igraph)
library(networkD3)
# import fonts
font.add.google("Poppins", "myfont")
showtext.auto()
# download data from Statistics New Zealand
X read.csv("http://www.stats.govt.nz/~/media/Statistics/Census/2013%20Census/profile-and-summary-reports/commuter-view-interactive/2013-usual-residence-by-workplace-address-territorial-authority.csv",
na.strings = "..C",
sep = ",",
stringsAsFactors = FALSE,
check.names = TRUE,
...read more
Source:: r-bloggers.com