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

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]

Publication date: 2022-02-15

Get the data

This dataset will be available under the terms of the Open Government Licence

Format of the data: TIFF

You must 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

 

Where/When

Study area
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.

Correspondence/contact details

Uday, N.G.
Ashoka Trust for Research in Ecology and the Environment
 gowri.uday@atree.org

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

Custodian
NERC EDS Environmental Information Data Centre
 info@eidc.ac.uk
Publisher
NERC EDS Environmental Information Data Centre
 info@eidc.ac.uk
Rights Holder
Ashoka Trust for Research in Ecology and the Environment
 gowri.uday@atree.org
Rights Holder
UK Centre for Ecology & Hydrology
 enquiries@ceh.ac.uk

Additional metadata

Topic categories
Imagery / Base Maps / Earth Cover
Keywords
flooding,  hydrology,  land cover,  monthly,  Remote Sensing,  SAR,  seasonal,  Sentinel 1,  surface water,  water body
INSPIRE Theme
Land Cover
Funding
Natural Environment Research Council Award: NE/R000131/1
Medical Research Council Award: MR/P024335/1
Arts and Humanities Research Council Award: MR/P024335/1
Natural Environment Research Council Award: MR/P024335/1
Biotechnology and Biological Sciences Research Council Award: MR/P024335/1
Economic and Social Research Council Award: MR/P024335/1
Spatial representation type
Raster
Spatial reference system
WGS 84
Last updated
16 February 2022 09:57