Surface water body extent and area dataset in the Sahel-Sudano-Guinean region of Africa (2000-2020)- A Big Earth Data Platform for Three Poles

The Surface water body extent and area dataset in pan-Sahel region includes the changes of surface water body (≥1km2) in pan-Sahelian 23 countries during 2000-2020. The dataset was produced based on the global surface water extent dataset (GSWED). Firstly, the misclassification caused by the dynamic threshold in the original GSWED data was eliminated by establishing the mask of area size and observation frequency to obtain an improved surface water data set. Then, the improved surface water surface data set was objected, and manually revised combination with global River widths from Landsat and lake data (HydroLAKES). Finally, based on the revised surface water body data set, the water body extent and area change in the Pan Sahel region in 21 years was counted.

The dataset is in the vector file format (.shp) and has the geographic coordinate system of WGS 1984. It not only reduces the redundancy of data but increases the surface water from pixel scale to object scale, which is of more practical significance in geo-analysis. The dataset covers the Sahel and West Africa and provides data support for the assessment and research of surface water resources in the region.

File naming and required software

File naming: the data is stored in ShapeFile vector data format. The file named "pansahelianwaterbodies_21years. SHP" records the name of surface water body, the maximum extent in 21 years and the maximum, minimum and average area in each year; The file named "pansahelianwaterbodies_yyyy. SHP" records the average area of each month, where yyyy represents the year, such as pansahelianwaterbodies_ 2010.shp represents this ShapeFile file, which records the maximum extent of each water body and its monthly average area in 2010.
Data reading method: software or computer language that can read ShapeFile can read the data, such as ArcGIS, envi, IDL, python, MATLAB, etc.

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Cite as:

Lv, Y., Jiang, M., Jia, L. (2022). Surface water body extent and area dataset in the Sahel-Sudano-Guinean region of Africa (2000-2020). A Big Earth Data Platform for Three Poles, DOI: 10.11888/Terre.tpdc.272055. CSTR: 18406.11.Terre.tpdc.272055. (Download the reference： RIS | Bibtex )

Using this data, the data citation is required to be referenced and the related literatures are suggested to be cited.

Support Program

Driving Mechanisms of Land Use and Cover Change in the Sahel: Impacts and Responses (No:41661144022)

Copyright & License

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License： This work is licensed under an Attribution 4.0 International (CC BY 4.0)