The Department of Justice and Constitutional Development publishes KML files and PDF maps of the magisterial (magistrate’s court) districts on its website. Unfortunately there are some discrepancies between the KML file and the PDF maps, and between them and the point-to-point descriptions in the official notices published in the Government Gazette. I’ve constructed a dataset which attempts to resolve these discrepancies, as well as clean up gaps and overlaps in the polygons so that the edges match. This dataset is shared on GitHub at https://github.com/afrith/za-judicial-maps in case it is useful to anyone else.

In August of this year Stats SA released data from Census 2022 at the level of police districts (precincts). With 1,167 police districts this is considerably more granular than the municipal-level data that was previously available. That being said, it is nothing like the ward-level data that was previously promised or the small area data available from Census 2011.

I’ve produced a collection of maps visualising some of the metrics from this police-district data layer, which you can see below. Click each one for the full-size image.

Please note that I write here in my personal capacity. The views expressed here are not those of my employer.

Following last week’s post in which I imagined the results of a mixed-member proportional electoral system with single-member constituencies, I thought it would also be interesting to look at the electoral system proposed in 2003 by the Report of the Electoral Task Team, also known as the “Van Zyl Slabbert Report”.

Please note that I write here in my personal capacity. The views expressed here are not those of my employer.

The 2024 election is behind us, but there is still discussion about electoral reform following the introduction of independent candidates and the separate regional ballot. Consequently I thought it would be interesting to update my imagined demarcation of single-member constituencies for 2024.

Since 2013, a website I developed has provided information on places from the South African National Census of 2011. Recently I’ve developed a GraphQL API to make that data available to other developers. In parallel with this API development, I’ve also added some extra data, and made some changes to the website. Read on for more details.

I’ve updated my Western Cape number plate map from 2014 to include the new CAA code for Cape Town.

This post presents a selection of maps I have produced in the last few weeks. If you follow me on Twitter or on Reddit you will have seen most of these already. All the images below are clickable thumbnails which link to a full-size version.

Five years ago, after the 2014 general election, I built an interactive map of the election results. Since then the state of the technology for web mapping has moved on, so I’ve developed a completely new version. This new map uses vector tiles for better rendering, includes results for four general elections (2004–2019), and allows you to drill all the way down to voting district level. And here it is.

The linguistic diversity index measures the probability that two people selected at random from a population speak different home languages. The map below, which I produced, depicts the linguistic diversity index calculated on a 10-kilometre-wide hexagonal grid across South Africa.

I’ve made an interactive website with six sets of topographic maps of Cape Town and surrounds covering the period from 1940 to 2010. You can zoom in and move around the maps, switching from one era to another.