7-day change in Vegetation Health Index - Kent (UK), 2022

Demonstration Case Name Multi-hazards in the Southeast UK region Dataset Title 7-day change in Vegetation Health Index - Kent (UK), 2022 Dataset Description This dataset consists of: NESDIS_STAR_7day_VHI_Kent2022_1km.tif a multi-layer (52-band) image where each layer represents the 7-day Vegetation Health Index (VHI) in 2022 for the wider Kent region in Southeast UK. NESDIS_STAR_7day_change_VHI_Kent2022_1km.tif: a multi-layer (51-band) image where each layer represents the 7-day change in Vegetation Health Index (VHI) in 2022 for the wider Kent region in Southeast UK. Data was generated using code developed within the Google Earth Engine online platform and output in GeoTIFF formats for interoperability and comparative analysis within GIS. Key Methodologies Calculation of pixel threshold where the 7-day change in vegetation health index is negative (declining) or positive (improving) over each 7-day window in the NESDIS STAR Vegetation Health Index dataset (https://www.star.nesdis.noaa.gov/smcd/emb/vci/VH/vh_ftp.php), calculated across the 2022 multi-date image stack. Data extracted from source then imported and analysis coded into Google Earth Engine online platform. Output in raster format. Temporal Domain Daily: 7th January 2022 to 31st December 2022 (7-day temporal resolution) Spatial Domain Geographic extent covering the region of Kent, Southeast UK. Projected Coordinate System: British National Grid (EPSG:27700) Spatial Extent Bounding Box: Upper Left (182000N, 509000E), Lower Right (95000N, 641000E) Spatial Resolution: 1km x 1km (resampled from original 4km data in GEE) Key Indicators 7-day image stack indicating where pixels indicate a decline (-) or improvement (+) in vegetation health, the decline associated with preconditioning for high heat events. Data Format GeoTIFF (*.tif) Source Data Primary source: National Oceanic and Atmospheric Administration (NOAA) National Environmental Satellite, Data, and Information Service (NESDIS) Center for Satellite Application and Research (STAR) Vegetation Health Index dataset (https://www.star.nesdis.noaa.gov/smcd/emb/vci/VH/vh_ftp.php), extracted and coded into the Google Earth Engine online platform (GEE). Accessibility 10.5281/zenodo.17131655 Stakeholder Relevance Urban planning departmentsEmergency response organizationsInfrastructure development teamsDisaster risk assessment analysts Limitations/Assumptions Original spatial resolution of data 4km (GeoTIFF). Additional Information Technical specifications: GeoTIFF format require use of a multi-band image visualisation package Pixel values represent the 7-day decline (-) or improvement (+) in vegetation health within that pixel. Contact Information [e-mail]