af697b57-cf0a-4dc3-aa46-b394cf9f8c72 Gregory Giuliani Université de Genève Lecturer +41 (0) 22 3790709 Telephone number of a facsimile machine for the responsible organization or individual 66 Boulevard Carl-Vogt Geneva 1205 Switzerland gregory.giuliani@unige.ch http://www.unige.ch/envirospace 2024-08-13T08:34:52 ISO 19115:2003/19139 1.0 EPSG:4326 Normalized Difference Water Index (NDWI) - Seasonal Mean - Switzerland 2019-09-17T00:00:00 58900fab-f60d-47df-b1bf-527a4105fe41 This dataset is a seasonal time-series of Landsat Analysis Ready Data (ARD)-derived Normalized Difference Water Index (NDWI) computed from Landsat 5 Thematic Mapper (TM) and Landsat 8 Opeational Land Imager (OLI). To ensure a consistent dataset, Landsat 7 has not been used because the Scan Line Correct (SLC) failure creates gaps into the data. NDWI quantifies plant water content by measuring the difference between Near-Infrared (NIR) and Short Wave Infrared (SWIR) (or Green) channels using this generic formula: (NIR - SWIR) / (NIR + SWIR) For Landsat sensors, this corresponds to the following bands: Landsat 5, NDVI = (Band 4 – Band 2) / (Band 4 + Band 2). Landsat 8, NDVI = (Band 5 – Band 3) / (Band 5 + Band 3). NDWI values ranges from -1 to +1. NDWI is a good proxy for plant water stress and therefore useful for drought monitoring and early warning. NDWI is sometimes alos refered as Normalized Difference Moisture Index (NDMI) Standard Deviation is provided in a separate dataset for each time step. Spring: March-April_May (_MAM) Summer: June-July-August (_JJA) Autumn: September-October-November (_SON) Winter: December-January-February (_DJF) Data format: GeoTiff This dataset has been genereated with the Swiss Data Cube (http://www.swissdatacube.ch) Julie Italiano Université de Genève julie.italiano@gmail.com https://geonetwork.swissdatacube.org/geonetwork/srv/api/records/af697b57-cf0a-4dc3-aa46-b394cf9f8c72/attachments/sdc-ndwi.png NDWI Water content Humidity Vegetation Switzerland 1250000 environment geoscientificInformation 5.85 10.55 45.75 47.85 1984-03-28 2019-06-15 application vnd.ogc.gml Gregory Giuliani Université de Genève gregory.giuliani@unige.ch OGC:WMS-1.1.1-http-get-map undefined undefined https://doi.org/10.26037/yareta:xzczpcai2nbp5l4na7rx2oelse DOI Normalized Difference Water Index (NDWI) - Seasonal Mean - Switzerland Yareta Repository