“An Evaluation of the Use of GIS and Open Data in Secondary School Education in South Africa, With Reference to QGIS and OpenStreetMap (OSM)”. The Journal of Geography Education in Africa 4, no. 1 (August 21, 2021): 23–57. Accessed May 5, 2024. https://upjournals.up.ac.za/index.php/jogea/article/view/2038.