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 International Charter Space and Major Disasters
Product ID: 1521 - English
Published: 5 Nov, 2010
GLIDE: FF-2010-000207-THA

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This map presents the potential flood affected lands around the town of Phra Nakhon Si Ayutthaya in Ayutthaya Province and close to the Chao Phraya River. SPOT 4 crisis imagery was acquired on 30 October 2010 and has a pan-sharpened resolution of 10m. This image was compared with a pre-crisis SPOT 5 with 10m resolution showing the situation as of 6 December 2007. Due to the extensive presence of rice fields over the observed area and a pre image of the same season, the analysis has a high level of uncertainty. Detected water bodies likely reflect an overrestimation of all flood-affected areas within the map extent, because of confusion with cultivated rice fields. This analysis has not yet been validated in the field. Please send ground feedback to UNITAR / UNOSAT.

Map Scale for A3: 1:90,000; Projection : UTM Zone 47 North; Datum: WGS-84 (EGM-96)
Satellite Data (1): SPOT 4
Resolution: 10 meters
Image Date: 30 October 2010
Satellite Data (2): SPOT 5
Resolution: 10 meters
Image Date: 06 December 2007
Copyright image 1 / 2: SPOT Image 2010
Elevation Data: Aster GDEM
Source: METI & NASA 2009
Hydrology Data: USGS HydroSheds/ESRI
Road Data: Open Street Map (OSM)
Airfield Data: NGA
Place names: Vmap0, OCHA
Flood Analysis: UNITAR / UNOSAT
Map Production: UNITAR / UNOSAT
Projection: UTM Zone 47N
Datum: WGS-84