Leveraging Landsat, TERRACLIMATE, and SRTM-DEM data to model spatial patterns of unexpecte

A 2.6 MB dataset by Alfred Homère Ngandam Mfondoum, last updated May 2026, containing geospatial data for modeling drought patterns. It leverages Landsat 8/9, TERRACLIMATE, and SRTM-DEM data to produce the Land Surface-Climate-Topography Combined Drought Model (LSCTDM_Comb) for the Sahel/Sahara interface region. The model for the 2014–2023 decade achieved an average cross-ROC/AUC of 0.818 and R² values between 0.64 and 0.96 when comparing reference and observed warmest periods.

Use Cases

• Modeling spatial patterns of drought risk based on combined Landsat, climate, and topographic data.
• Analyzing trends in drought hazards with latitude at the Sahel-Sahara interface based on the LSCTDM_Comb model.
• Downscaling and adjusting climatic and topographic drought indicators to satellite-derived land surface indices.
• Validating drought models using metrics like cross-ROC/AUC, RMSE, MAE, and RAE mentioned in the description.

Strengths

• Model performance metrics are provided, including an average cross-ROC/AUC of 0.818 for the 2014–2023 decade.
• Error metrics are quantified with specific ranges: RMSE [0.0368–0.246], MAE [0.0031–0.0233], and RAE [0.005–0.0393].
• Coefficient of determination (R²) values between reference and observed data are reported as [0.64–0.96].
• The methodology integrates multiple data sources (Landsat, TERRACLIMATE, SRTM-DEM) for a combined drought model.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• The description mentions resolution discrepancies as a caveat when comparing to other models.

Provenance

Source

figshare

Collection Method

Geospatial procedure leveraging Landsat 8/9, TERRACLIMATE, and SRTM-DEM data to develop the Improved Land Surface General Drought Index and the combined LSCTDM_Comb model.

Time Range

2014–2023

Freshness

Last updated 2026-05-05 07:18:14; freshness should be verified.

Geography

Sahel/Sahara interface region