ABSTRACT

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.

摘要

有关城市扩张的信息是预测城市即将发生的土地覆盖和土地利用变化的重要输入。本研究结合 Landsat 8、夜间灯光和人口数据来评估 2013 年至 2018 年南非金伯利的城市扩张。本研究使用分类后变化检测方法来衡量城市扩张。城市和非城市土地利用类别，这两个类别对此分析进行了映射和评估。总体而言，2013 年至 2018 年的城市扩张率为 15%，而年均城市扩张率为 0.6%。根据卫星图像计算的夜间灯光越来越多地被社会科学家用作经济活动或经济发展的代表。2013年至2018年期间，城市夜间灯光和城市人口均出现高速增长。该研究获得了 2013 年和 2018 年夜间灯光和人口数据集 0.51 和 0.57 的正相关性，表明研究区域的人口和照明正增加。市政当局和政策制定者可以在城市和环境规划中使用这些知识作为反馈。