Product ID: 2779 - English
Published: 1 Mar, 2018
GLIDE: TC20180209TON
FootPrint (Lat x Long, WSG84 Geographic, decimal degrees)
TopLeft: -21.2758733 x -175.0396127
BottomRight: -21.0602455 x -175.366032

Product Links
PDF (452.1Kb)     - Static viewing and printing

This map illustrates comprehensive building damage assessment and related density in Tongatapu island by district as detected by Pleiades and WorldView-2 satellite imagery following the passage of the tropical cyclone GITA-18. The UNITAR-UNOSAT analysis combined with Copernicus EMS analysis identified about 7,700 potentially damaged structures across the Tongatapu Island. According to the pre-event building footprints provided by Humanitarian Open Street Map, this represents 34% of the total number of structures / buildings. The most affected districts in terms of percentage of damage are Vaini & Lapaha, with an estimate of 55% and 46% of damage. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR-UNOSAT.

Satellite Data (Post): Pleiades
Imagery Dates: 14, 15, 16 & 21/02/2018
Resolution: 50 cm
Copyright: CNES 2018 Distribution AirbusDefence and Space
Source: Airbus Defence and Space
Satellite Data (Post & Pre): WorldView-2 & WorldView-3
Imagery Date: 13/02/2018 / 12/01/2018
Resolution: 50 cm
Copyright: DigitalGlobe, Inc
Source: USGS-HDDS
Road data & building footprints : OpenStreetMap contributors (12/02/2018)
Analysis: UNITAR - UNOSAT
Production: UNITAR - UNOSAT