Uday, N.G. ; Purse, B.; Vanak, A.T.; Samrat, A.; Chaudhary, A.; Gerard, F.
Radar derived seasonal surface water maps for three Indian districts (Shivamogga, Sindhudurg, Wayanad), 2017-2018
Cite this dataset as:
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
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This dataset is available under the terms of the Open Government Licence
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wget --user=YOUR_USERNAME --password=YOUR_PASSWORD --auth-no-challenge https://catalogue.ceh.ac.uk/datastore/eidchub/3c23fea1-5b27-4b01-b9ef-fc13346cfedc
https://doi.org/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]
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]
Publication date: 2022-02-15
View numbers valid from 01 June 2023 Download numbers valid from 20 June 2024 (information prior to this was not collected)
Format
TIFF
Spatial information
Study area
Spatial representation type
Raster
Spatial reference system
WGS 84
Temporal information
Temporal extent
2017-01-01 to 2018-12-31
Provenance & quality
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.
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.
Licensing and constraints
This dataset is available under the terms of the Open Government Licence
Cite this dataset as:
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
Related
This dataset is included in the following collections
Correspondence/contact details
Authors
Uday, N.G.
Ashoka Trust for Research in Ecology and the Environment
Purse, B.
UK Centre for Ecology & Hydrology
Vanak, A.T.
Ashoka Trust for Research in Ecology and the Environment
Samrat, A.
Ashoka Trust for Research in Ecology and the Environment
Chaudhary, A.
Ashoka Trust for Research in Ecology and the Environment
Gerard, F.
UK Centre for Ecology & Hydrology
Other contacts
Rights holders
Ashoka Trust for Research in Ecology and the Environment, UK Centre for Ecology & Hydrology
Custodian
NERC EDS Environmental Information Data Centre
info@eidc.ac.uk
Publisher
NERC EDS Environmental Information Data Centre
info@eidc.ac.uk
Additional metadata
Keywords
Funding
Natural Environment Research Council Award: NE/R000131/1
Medical Research Council Award: MR/P024335/1
Medical Research Council Award: MR/P024335/1
Last updated
13 September 2024 10:40