Observed Water Extent (eng)

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Layer name Observed Water Extent (GFM)
Tag Flood
Folder Eo Satellite
Source Observed Water Extent
Description The Sentinel-1 Observed Water Extent identifies the pixels classified as open and calm water using Sentinel-1 SAR backscatter intensity and is derived using the ensemble flood mapping algorithm.

To map water extent pixels for a certain date, the algorithm uses as input the Sentinel-1 data overpass plus offline-generated Sentinel-1 SAR parameters and auxiliary thematic datasets such as Exclusion Mask and topography(e.g. DEM and HAND index).
The relative orbit path information, to select the corresponding offline-generated Sentinel-1 SAR parameters, is extracted from the“Sentinel-1 Metadata”. All the processing is done at the 20m-sampling of the Sentinel-1 pre-processed data cube. The Sentinel-1 Observed Water Extent values are described below. |-

Screenshot
GFMOBWE.png
Properties
Available variables Observed Water Extent
Available accumulations
Available interpolation algorithms
Available filters
Spatial aggregations


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