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AWEI Surface Water Definition Workflow


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Created: Aug 06, 2025 at 4:43 p.m. (UTC)
Last updated: Sep 02, 2025 at 2:50 p.m. (UTC)
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Abstract

Water definition workflow code from Google Earth Engine - example: https://code.earthengine.google.com/a218f576fc80afcbe37f2220ba59e75d

This code uses Otsu thresholding on median AWEI values, calculated from Sentinel-2 MSI imagery, to generate a binary "isWater" raster where 1 = water and 0 = not water.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
Kavango Zambezi Transfrontier Conservation Area
Longitude
22.8186°
Latitude
-18.4171°

Temporal

Start Date:
End Date:

Content

Credits

Funding Agencies

This resource was created using funding from the following sources:
Agency Name Award Title Award Number
WWF-US

Contributors

People or Organizations that contributed technically, materially, financially, or provided general support for the creation of the resource's content but are not considered authors.

Name Organization Address Phone Author Identifiers
Robin Naidoo WWF-US
Steven Osofsky AHEAD
Shirley Atkinson AHEAD
Piet Beytell Namibia MEFT
Anna Songhurst Ecoexist

How to Cite

Swift, M., WWF-US (2025). AWEI Surface Water Definition Workflow, HydroShare, http://www.hydroshare.org/resource/1eda26a154c34f2c9aa3e2eb41877ad4

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/
CC-BY

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