International Charter Space and Major Disasters
Product ID: 1405 - English
Published: 24 Dec, 2009
GLIDE: FF-2009-000260-LKA
FootPrint (Lat x Long, WSG84 Geographic, decimal degrees)
TopLeft: 8.041693 x 81.137776
BottomRight: 7.173859 x 81.986218

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This map illustrates satellite-detected areas of likely standing flood waters and flood-affected land / saturated soils among the affected towns and villages of Batticaloa District, based on change detection analysis with ENVISAT ASAR IMP radar data recorded 14 December and 9 March 2009. Because the input radar scenes were acquired with VV polarization, there is an associated higher level of uncertainty regarding the accuracy and completeness of water detection. It is possible that water levels have been underestimated in heavily vegetated areas and within urban environments. 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: 1:240,000; Projection: SL grid 99; Datum: Kandawala.
Satellite Data: ASAR IMP
Resolution: 25m
Polarization: VV
Source: ESA 2009
Radar Dates: 14 Dec. & 9 March 2009
Elevation Data: SRTM / Aster GDEM
Source: METI & NASA 2009
Other Data: USGS, NGA, WDPA
Flood Analysis: UNITAR / UNOSAT
Map Production: UNITAR / UNOSAT