Product ID: 2776 - English
Published: 26 Feb, 2018
GLIDE: TC20180209TON

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UNITAR - UNOSAT, following the request of UNESCO Office for the Pacific States, has performed a satellite based analysis of the cultural heritages sites of :
Ha'amonga 'a Maui Trilithon Historic Park (Niutoua)
Lapita Pottery Archaeological Site (Nukuleka)
Ancient Royal Tombs of Lapaha (Mua)
The aim is to search for signs of damage, after the passage of the Tropical cyclone GITA-18 that struck Tongatapu Island, Tonga on the 12 February 2018.

For this analysis UNOSAT has used a post-event cloud free images of the area, collected on 15 & 16 February 2018, and the most recent pre-event satellite image before the cyclone occurred, collected on 12 January 2018.

Comparison between these two images allows to identify and detect changes that happened in this period of time and they can be related to the impact caused by Tropical Cyclone GITA-18.

The findings are illustrated in the following pages.

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: 15/02/2018 and 16/02/2018
Resolution: 50 cm
Copyright: CNES 2018 Distribution AirbusDefence and Space
Source: Airbus Defence and Space
Satellite Data (Pre): WorldView-3
Imagery date: 12/01/2018
Resolution: 31 cm
Copyright: DigitalGlobe, Inc
Source: USGS-HDDS
UAV / aerial imagery:Peter Quilter, Tonkin +Taylor International Ltd
Analysis : UNITAR - UNOSAT
Production: UNITAR - UNOSAT