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Open AccessArticle

Mapping Urban and Peri-Urban Land Cover in Zimbabwe: Challenges and Opportunities

1
LocaSense Research Systems, Harare, Zimbabwe
2
Department of Geography, Geospatial Sciences and Earth Observation, University of Zimbabwe, Mount Pleasant, Harare, Zimbabwe
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Rainbow Secondary School, Gaborone, Botswana
*
Author to whom correspondence should be addressed.
Academic Editor: Naser El-Sheimy
Received: 5 February 2021 / Revised: 22 February 2021 / Accepted: 26 February 2021 / Published: 3 March 2021
Accurate and current land cover information is required to develop strategies for sustainable development and to improve the quality of life in urban areas. This study presents an approach that combines multi-seasonal Sentinel-1 (S1) and Sentinel-2 (S2) data, and a random forest (RF) classifier in order to map land cover in four major urban centers in Zimbabwe. The specific objective of this study was to assess the potential of multi-seasonal (rainy, post-rainy, and dry season) S1, rainy season S2, post-rainy season, dry season S2, multi-seasonal S2, and multi-seasonal composite S1 and S2 data for mapping land cover in urban areas. The study results show that the combination of multi-seasonal S1 and S2 data improve land cover mapping in urban and peri-urban areas relative to only multi-seasonal S1, mono-seasonal S2, and multi-seasonal S2 data. The overall accuracy scores for the multi-seasonal S1 and S2 land cover maps are above 85% for all urban centers. Our results indicate that rainy and post-rainy S2 spectral bands, as well as dry-season S1 VV and VH bands (ascending orbit) are the most important features for land cover mapping. In particular, S1 data proved useful in separating built-up areas from cropland, which is usually problematic when only optical imagery is used in the study area. While there are notable improvements in land cover mapping, some challenges related to the S1 data analysis still remain. Nonetheless, our land cover mapping approach shows a potential to map land cover in other urban areas in Zimbabwe or in Sub-Sahara Africa. This is important given the urgent need for reliable geospatial information, which is required to implement the United Nations Sustainable Development Goals (UN SDGs) and United Nations New Urban Agenda (NUA) programmes. View Full-Text
Keywords: earth observation satellite; Sentinel-1; Sentinel-2; random forest; urban; peri-urban; Zimbabwe earth observation satellite; Sentinel-1; Sentinel-2; random forest; urban; peri-urban; Zimbabwe
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MDPI and ACS Style

Kamusoko, C.; Kamusoko, O.W.; Chikati, E.; Gamba, J. Mapping Urban and Peri-Urban Land Cover in Zimbabwe: Challenges and Opportunities. Geomatics 2021, 1, 114-147. https://0-doi-org.brum.beds.ac.uk/10.3390/geomatics1010009

AMA Style

Kamusoko C, Kamusoko OW, Chikati E, Gamba J. Mapping Urban and Peri-Urban Land Cover in Zimbabwe: Challenges and Opportunities. Geomatics. 2021; 1(1):114-147. https://0-doi-org.brum.beds.ac.uk/10.3390/geomatics1010009

Chicago/Turabian Style

Kamusoko, Courage; Kamusoko, Olivia W.; Chikati, Enos; Gamba, Jonah. 2021. "Mapping Urban and Peri-Urban Land Cover in Zimbabwe: Challenges and Opportunities" Geomatics 1, no. 1: 114-147. https://0-doi-org.brum.beds.ac.uk/10.3390/geomatics1010009

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