Part of UKCEH UKCEH logo
UKCEH website
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

Download/Access
PLEASE NOTE: By accessing or using this dataset, you agree to the terms of the relevant licence agreement(s). You will ensure that this dataset is cited in any publication that describes research in which the data have been used.

This dataset is available under the terms of the Open Government Licence

Download the data

Bulk download options

You can use WGET to download data. For example
wget --user=YOUR_USERNAME --password=YOUR_PASSWORD --auth-no-challenge https://catalogue.ceh.ac.uk/datastore/eidchub/3c23fea1-5b27-4b01-b9ef-fc13346cfedc

Further information and help »

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]
Publication date: 2022-02-15
36 downloads *
748 views *

More information

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.

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

NERC National Capability SUNRISE Project datasets

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

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

Topic categories
imageryBaseMapsEarthCover
Keywords
flooding , hydrology , Hydrology , land cover , remote sensing , SAR , seasonal , Sentinel 1 , surface water , water body
Funding
Natural Environment Research Council Award: NE/R000131/1
Medical Research Council Award: MR/P024335/1
Last updated
13 September 2024 10:40