Sahelian wetlands
Mapping and modelling of temporal and bio-physical phenomena of the sahelian wetlands environment using VEGETATION data
Funded by: The Belgian Federal Office for Scientific, Technical and Cultural Affairs (OSTC). The SPOT-VEGETATION images were made available within the framework of the VEGETATION Preparatory Program. Field data were provided by the IUCN Waza-Logone Project.
Research associates: Jan Verhoeye and Myriam Sys
Promoter: Robert De Wulf
Duration: 1996-1998
Project objectives
The aim of the project is twofold:
- Mapping of land cover types of the Sahelian wetlands environment using coarse resolution satellite images;
- Monitoring of temporal bio-physical phenomena occurring in this environment.
Initially the project activities have focused on the first topic. For this purpose a methodology for subpixel mapping has been selected, applied and evaluated. During the second year the second topic has been elaborated. Two methodologies for monitoring wetlands are described. First the post-classification comparison technique is elaborated. Subsequently multi-temporal change vector analysis is presented and applied on the Sahelian wetlands using NOAA-AVHRR images. Finally the methodology for subpixel mapping, developed during the first year, has been applied to real SPOT-VEGETATION images.