South Africa’s decennial population census is a critical tool for understanding the demographic and socio-economic makeup of the nation. The 2022 census conducted between February and May 2022, aimed to provide comprehensive data on the population, capturing data on various attributes like age, gender, race, language, and dwelling type. Despite its comprehensive approach, the census faced unique challenges that affected its outcomes, highlighting the need for careful analysis and consideration of the data collected.
Despite efforts to ensure accuracy, the 2022 census encountered significant obstacles that led to an unprecedented undercount rate of 31% – a figure more than double that of the 2011 census. The Post Enumeration Survey indicated a net undercount rate for Africans at 36.7%, Coloureds 44.9%, Indians 72.3% and Whites of 61.6%. After weighting the undercounts figures were moderated for Africans to 31.3%, Coloureds 28.7%, Indians 42.1% and Whites to 24.8%. These adjustments to the census data were part of an effort to account for under estimation, but even so the adjusted data should be viewed with caution.
GeoScope suggested a variety of measures, including conducting a comprehensive review of the results to refine the data, particularly at a detailed level, and advising caution in using the current census data for development planning. To enhance the reliability of future censuses, alternative methods of estimating the population should be considered. This process involves using satellite imagery combined with machine learning algorithms to classify all types of dwellings across South Africa. Additionally, by integrating secondary data sources that are nationally representative such as household surveys, demographic attributes such as age, population group, and gender can be assigned to these dwellings. This approach facilitates the annual calculation of the population size as has been done by GeoScope.
A Promise of Precision: GeoScope Provides Granular Demographic Estimates
Given the complexities and challenges faced by the 2022 census, the value of precise and timely demographic data cannot be overstated. Our company, GeoScope, specialises in delivering accurate demographic estimates crucial for strategic decision-making. With a focus on detailed and current data from 2024, we provide insights that are essential for both the private and public sectors.
Our detailed demographic estimates are designed to meet the needs of various stakeholders by providing up-to-date information on population size and characteristics. This data is invaluable for targeted marketing, identifying optimum locations for products and services, and enabling comprehensive statistical analysis for planning and development. Additionally, our regular updates and use of advanced statistical and geospatial techniques ensure that our clients can access the most reliable information available.
To create the 2024 population estimates at a granular level, a combination of machine learning and statistical methods is employed. Input variables such as current building counts, granular-level satellite telemetry (including population distributions, nightlights, road access, and land cover), and voter statistics from the last election are used. These population estimates are weighted to align with contemporary demographic profiles provided by Stats SA as part of the 2024 mid-year estimates at the municipal level, ensuring continuity with official figures. The cohort-component methodology within the Spectrum Policy Modelling system was used by Stats SA to estimate South Africa’s 2024 mid-year population adjusting for limitations arising from the 2022 census. Additionally, household variables are derived using machine learning models to define the number of households from sources like Stats SA’s General Household Survey. The update of the population estimates is done on an annual basis.
As South Africa looks forward to the next census in 2031, it is clear that the lessons learned from the 2022 count will play a pivotal role in shaping future approaches. Meanwhile, GeoScope continues to bridge the gap by offering dependable demographic data that empowers organizations to make informed decisions based on solid, scientifically based population estimates. Whether it’s for strategic planning, market analysis, or policy development, the accuracy and granularity of our data are what set us apart in a world that’s increasingly driven by precision and detail.
