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Flood Affected Areas in Central Dakar, Senegal

Mon, 7 Sep 2009 22:16:52 GMT
 International Charter Space and Major Disasters
Product ID: 1374 - English
Published: 8 Sep, 2009
GLIDE: FL-2009-000164-SEN
FootPrint (Lat x Long, WSG84 Geographic, decimal degrees)
TopLeft: 14.791 x -17.421
BottomRight: 14.745 x -17.32

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This map illustrates satellite-detected areas of possible flood waters and flood-affected areas within the central section of the capital city of Dakar, Senegal, as based on change detection methods using Radarsat-2 data acquired 4 September and pre-crisis Spot-5 imagery acquired 11 May 2009. Pre-crisis Radasat-1 from 5 September 2006 was also used. Please note there is an associated high degree of uncertainly for this flood assessment resulting from the dense urban environment and the lack of archived radar data of corresponding sensor characteristics. It is likely that standing water bodies located along narrow streets have been significantly underestimated, and that some detected water bodies shown in the map are errors resulting from the interaction of the satellite radar signals with buildings. This flood assessment is a preliminary analysis & has not yet been validated in the field. Please send ground feedback to UNITAR / UNOSAT. Map scale for A3: 1:30,000 Projection : UTM Zone 28 North; Datum : WGS-84 (EGM-96).
Satellite Data (1): Radarsat-2 / 1
Imagery Dates : 4 Sept. 2009, / 5 Sept. 2006
Resolution : 3m / 12.5m
Copyright : RADARSAT-2 © MDA 2009
Credit :Canadian Space Agency
Satellite Data (2) : SPOT-5 (2.5m Panshapened)
Imagery Date : 11 May 2009
Copyright : SPOT Image 2009
Road Data : Google Map Maker 2009
Other Data : WDPA, USGS, NGA
Flood Analysis : UNITAR / UNOSAT

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