Mapping of African urban settlements using Google Earth images - Archive ouverte HAL
Article Dans Une Revue International Journal of Remote Sensing Année : 2021

Mapping of African urban settlements using Google Earth images

Dynamiques démographiques, vulnérabilité et évolution du couvert végétal au nord Bénin : des interactions complexes

Résumé

The main purpose of this work is to explore a reproducible way of replacing manual digitalizations of urban agglomerations using textural image processing from free high-resolution Google Earth images. Photo-interpretation from very high-resolution satellite images is a reliable method for extracting urban mages is a reliable method for extracting urban agglomerations, but it is extremely time consuming. As an alternative to manual digitalization, a numerical image analysis method based on mathematical morphology has been developed to detect textural patterns associated with built-up areas. Hundreds of urban agglomerations were extracted using this method and then compared to an open geodatabase. The results were better for humid egions, and omission errors were consistently larger than commission errors for the whole dataset, underlining the challenge of detecting highly scattered habitats with texture analyses. However, the method could provide an appropriate estimate of overall urbanization. This research highlights the weaknesses and the strengths of the method compared to manual digitalization, illuminating paths for future improvement of ialternative procedures to manual digitalization.
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Dates et versions

hal-04017907 , version 1 (07-03-2023)

Identifiants

Citer

José Luis San Emeterio, Catherine Mering. Mapping of African urban settlements using Google Earth images. International Journal of Remote Sensing, 2021, 42 (13), pp.4882-4897. ⟨10.1080/01431161.2021.1903613⟩. ⟨hal-04017907⟩
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