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Information on urban expansion is a significant input in forecasting upcoming land cover and land use changes in a city. This study combines Landsat 8, night-time lights, and population data to assess urban expansion in Kimberley, South Africa from 2013 to 2018. This study used a post-classification change detection approach to measure urban expansion. Urban and non-urban land use classes where the two classes mapped and evaluated for this analysis. Overall, urban expansion from 2013 to 2018 was 15% while the annual urban expansion rate experienced was 0.6%. Night-time lights, calculated from satellite imagery, are increasingly used by social scientists as a proxy for economic activity or economic development. During the period of 2013 to 2018, both the urban night-time lights and the urban population experienced high rates of growth. This study obtained a positive correlation for night-time light and population datasets of 0.51 for 2013 and 0.57 for 2018, to suggest a positive population and lighting increase in the study area. Municipal authorities and policymakers may use this knowledge as feedback during urban and environmental planning.

Using land cover, population, and night light data to assess urban expansion in Kimberley, South Africa