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Flash-Flood Affected Areas in Nguyen Phuc, Bach Thong, Bac Kan Province, Viet Nam
21 Jul 2009
 Source: UNOSAT

Background

•  South East Asia Monsoon

•  Floods

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Viet Nam - This map illustrates satellite-detected areas likely affected by flash flooding in the province of Bac Kan, Viet Nam, as based on change detection methods using Radarsat 2 & 1 data acquired over the area on 11 July 2009 & 19 March 2001. The newly-released ASTER global elevation model (GDEM) was also used in the flooding analysis. Pre-crisis Spot-5 imagery from 11 November 2008 was used for road and main building identification using automated identification methods. This flood assessment is a preliminary analysis & has not yet been validated in the field. Map scale for A3: 1:26,000; Projection : UTM Zone 48 North; Datum : WGS-84 (EGM-96).


Satellite Data (1) : RADARSAT- 1 & 2
Imagery Dates : 11 July 2009 & 19 March 2001
Resolution : 25 m
Copyright : RADARSAT-2 © MDA 2009
Credit :Canadian Space Agency
Satellite Data (2) : SPOT-5 (2.5m Panshapened)
Imagery Date : 11 November 2008
Copyright : SPOT Image 2009
Elevation Data : ASTER GDEM
Resolution : 27m
Source : METI & NASA 2009
GIS Data : CISIN
Other Data : OSM, ESRI, USGS, NGA
Roads & Buildings : UNITAR / UNOSAT
Flood Analysis : UNITAR / UNOSAT
Map Production : UNITAR / UNOSAT


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Source:UNOSAT
Country:Viet Nam
Link to high-Res:File size: 5.241 MB
Link to mid-Res:File size: 1.253 MB
KML: Link to KML file


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