Product ID: 2769 - English
Published: 15 Feb, 2018
GLIDE: TC20180209TON


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This map illustrates satellite-detected building damage assessment as of 13 February 2018, over the Island of Eua, Tonga, following the passage of the tropical cyclone GITA-18. The analysis was conducted using post-event WorldView-2 images and pre-event GeoEye-1 images as of 28 June 2017. A total of 542 buildings were detected as damaged over the towns of Houma, Ohnoua, Pangai and Tufuvai. According to the pre-building footprints provided by Humanitarian Open Street Map, this represents 47% of the total number of structures in Eua Island. The analysis could have been underestimated due to cloud cover. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR - UNOSAT.
Satellite Data (1): WorldView-2
Imagery Dates: 13/02/2018
Resolution: 55 cm
Copyright: DigitalGlobe Inc.
Source: USGS-HDDS
Satellite Data (2): Geoeye-1
Imagery Dates: 28/06/2017
Resolution: 46 cm
Copyright: DigitalGlobe Inc
Source: USGS-HDDS
Road Data : OpenStreetMap
Baseline Data: HealthSites
Building footprints: OpenStreetMap contributors (02/03/2018)
Analysis : UNITAR - UNOSAT
Production: UNITAR - UNOSAT