3c23fea1-5b27-4b01-b9ef-fc13346cfedc English ISO/IEC 8859-1 (also known as Latin 1) dataset dataset NERC EDS Environmental Information Data Centre Lancaster Environment Centre, Library Avenue, Bailrigg Lancaster LA1 4AP UK info@eidc.ac.uk https://eidc.ac.uk/ EIDC website The Environmental Information Data Centre (EIDC) is the UK's national data centre for terrestrial and freshwater sciences. information pointOfContact 2025-11-13T16:25:58 UK GEMINI 2.3 WGS 84 Radar derived seasonal surface water maps for three Indian districts (Shivamogga, Sindhudurg, Wayanad), 2017-2018 2022-02-15 publication https://catalogue.ceh.ac.uk/id/3c23fea1-5b27-4b01-b9ef-fc13346cfedc 10.5285/3c23fea1-5b27-4b01-b9ef-fc13346cfedc doi: Uday, N.G., Purse, B., Vanak, A.T., Samrat, A., Chaudhary, A., Gerard, F. (2022). Radar derived seasonal surface water maps for three Indian districts (Shivamogga, Sindhudurg, Wayanad), 2017-2018. NERC EDS Environmental Information Data Centre 10.5285/3c23fea1-5b27-4b01-b9ef-fc13346cfedc Data provided are monthly surface water layers extracted from Sentinel1A SAR data for 3 districts in India (Shivamogga, Sindhudurg, Wayanad) for the year 2017 and 2018. Surface water body layers were mapped using an average monthly threshold value extracted from the image backscatter histogram. The average threshold value excluded the monsoon months due to the difference in water and not water area. The threshold value was slightly lesser than the mean threshold value. The end product was validated using field data which resulted in user and producer accuracies. Monthly surface water body layers were not produced for a few months due to the non-availability of Sentinel 1 data. The work was supported by MRC, AHRC, BBSRC, ESRC and NERC [grant number MR/P024335/1] and NERC - SUNRISE project [grant number NE/R000131/1] Full details about this dataset can be found at https://doi.org/10.5285/3c23fea1-5b27-4b01-b9ef-fc13346cfedc Uday, N.G. Ashoka Trust for Research in Ecology and the Environment gowri.uday@atree.org author Purse, B. UK Centre for Ecology & Hydrology enquiries@ceh.ac.uk author Vanak, A.T. Ashoka Trust for Research in Ecology and the Environment avanak@atree.org author Samrat, A. Ashoka Trust for Research in Ecology and the Environment abhishek.samrat@atree.org author Chaudhary, A. Ashoka Trust for Research in Ecology and the Environment anusha.chaudhary98@gmail.com author Gerard, F. UK Centre for Ecology & Hydrology enquiries@ceh.ac.uk author Uday, N.G. Ashoka Trust for Research in Ecology and the Environment gowri.uday@atree.org pointOfContact NERC EDS Environmental Information Data Centre info@eidc.ac.uk custodian NERC EDS Environmental Information Data Centre info@eidc.ac.uk publisher Ashoka Trust for Research in Ecology and the Environment gowri.uday@atree.org owner UK Centre for Ecology & Hydrology enquiries@ceh.ac.uk owner remote sensing land cover hydrology flooding water body surface water GEMET - Concepts, version 4.1.3 2019-01-28 creation Hydrology Sentinel 1 SAR seasonal otherRestrictions no limitations otherRestrictions This resource is available under the terms of the Open Government Licence otherRestrictions If you reuse this data, you should cite: Uday, N.G., Purse, B., Vanak, A.T., Samrat, A., Chaudhary, A., Gerard, F. (2022). Radar derived seasonal surface water maps for three Indian districts (Shivamogga, Sindhudurg, Wayanad), 2017-2018. NERC EDS Environmental Information Data Centre https://doi.org/10.5285/3c23fea1-5b27-4b01-b9ef-fc13346cfedc grid 10 English utf8 imageryBaseMapsEarthCover 2017-01-01 2018-12-31 73.21 76.47 11.38 16.67 TIFF NERC EDS Environmental Information Data Centre info@eidc.ac.uk distributor https://data-package.ceh.ac.uk/sd/3c23fea1-5b27-4b01-b9ef-fc13346cfedc.zip Supporting information Supporting information available to assist in re-use of this dataset information https://catalogue.ceh.ac.uk/datastore/eidchub/3c23fea1-5b27-4b01-b9ef-fc13346cfedc Download the data Download a copy of this data fileAccess dataset dataset Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 Maps were generated using Sentinel1A GRD data pre-processed to backscatter images using the SNAP software. Surface water is identified by applying a water/non-water threshold on the SAR backscatter images. The resulting maps were validated against in situ reference data to produce a measure of class user’s and producer’s accuracy.