Winter Wheat Extent Maps (2001–2020) for the Bulgaria–Turkey Cross-Border Region Using the Peak Value Method (PVM)

This dataset supports the research presented in the Ph.D. dissertation by Aparna R. Phalke, titled "Investigating the Impacts of Support Policies on Agricultural Land Use and Production with Satellite Remote Sensing: A Case Study in the Cross-Border Area Between Turkey and Bulgaria" (University of Wisconsin–Madison, 2021). The dataset represents one of the core outputs of the dissertation and provides the first consistent, field-scale annual maps of winter wheat extent (2001–2020) across Bulgaria and northwestern Turkey using the Peak Value Method (PVM), a novel, training-independent remote sensing approach. These maps contribute to understanding long-term agricultural dynamics in support of cross-border monitoring and policy evaluation. All preprocessing, EVI extraction, threshold optimization, and accuracy assessment workflows are documented and reproducible via the accompanying GitHub repository. Code and documentation: https://github.com/aparnaphalke/PeakValueMethod_WinterWheatMapping Please cite this dataset as:Phalke, A.R. (2025). Annual Winter Wheat Maps for Bulgaria–Turkey (2001–2020). Zenodo. https://doi.org/xxxxx (Replace with actual DOI after submission) For now: 10.5281/zenodo.15612010 Phalke, A.R., 2021. Investigating the Impacts of Support Policies on Agricultural Land Use and Production with Satellite Remote Sensing: A Case Study in the Cross-Border Area Between Turkey and Bulgaria. University of Wisconsin–Madison.