Radar derived seasonal surface water maps for three Indian districts (Shivamogga, Sindhudurg, Wayanad), 2017-2018

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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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

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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.

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

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