TONGA Æ5 Tropical Cyclone - UNITAR...(12/02/2018) Analysis : UNITAR - UNOSAT Production: UNITAR -...
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0 100 200 300 400 500 50 Meters UNITAR - UNOSAT - Palais des Nations CH-1211 Geneva 10, Switzerland - T: +41 22 767 4020 (UNOSAT Operations) - Hotline 24/7 : +41 75 411 4998 - [email protected] - www.unitar.org/unosat " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " )" ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " )" ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " )" ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " )" ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " )" ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " )" ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " )" ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) 175°9'0"W 175°9'0"W 175°10'0"W 175°10'0"W 175°11'0"W 175°11'0"W 21°8'0"S 21°8'0"S 21°9'0"S 21°9'0"S TONGA Tongatapu Island Imagery analysis: 15 February 2018 | Published 26 February 2018 | Version 1.0 Tropical Cyclone TC20180209TON This map illustrates satellite-detected building damage assessment as of 15 February 2018, over the eastern part of the city of Nuku-alofa and the town of Popua, Tongatapu Island, Tonga, following the passage of the tropical cyclone GITA-18. The analysis was conducted using a post-event Pleiades image as of 15 February 2018 and a pre-event WorldView-3 image as of 12 January 2018. UNITAR-UNOSAT analysis identified 637 potentially damaged structures within the area. According to the pre-event building footprints provided by Open Street Map, this represents 27% of the total number of buildings analyzed. Some areas have been affected by floods, such as the coast east of Nuku-alofa and the town of Popua. Here, buildings surrounded by floodwater are considered as potentially damaged. Overall, the satellite detected damage level was severe, in this part of the island. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR - UNOSAT ¥ ¦ ¬ Nuku'alofa 'Eua Tongatapu The depiction and use of boundaries, geographic names and related data shown here are not warranted to be error-free nor do they imply official endorsement or acceptance by the United Nations. UNOSAT is a program of the United Nations Institute for Training and Research (UNITAR), providing satellite imagery and related geographic information, research and analysis to UN humanitarian & development agencies & their implementing partners. This work by UNITAR-UNOSAT is licensed under a CC BY-NC 3.0. Damage Assessment of eastern part of Nuku-alofa, Tongatapu Island, Tonga Satellite Data (Post): Pleiades Imagery Date: 15/02/2018 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 Road data & building footprints : OpenStreetMap contributors (12/02/2018) Analysis : UNITAR - UNOSAT Production: UNITAR - UNOSAT ! I Map Scale for A3: 1:14,000 Analysis conducted with ArcGIS v10.4.1 Coordinate System: WGS 1984 UTM Zone 1S Projection: Transverse Mercator Datum: WGS 1984 Units: Meter Map location INSET 2: 12 January 2018 Æ 5 INSET 1: 15 February 2018 Legend " ) Damaged building Road See insets 3 and 4 for close-up view of flooded buildings INSET 3: 15 February 2018 INSET 4: 12 January 2018 See insets 1 and 2 for close-up view of damaged & destroyed structures Popua 49% Nuku-alofa
Transcript of TONGA Æ5 Tropical Cyclone - UNITAR...(12/02/2018) Analysis : UNITAR - UNOSAT Production: UNITAR -...
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UNITAR - UNOSAT - Palais des Nations CH-1211 Geneva 10, Switzerland - T: +41 22 767 4020 (UNOSAT Operations) - Hotline 24/7 : +41 75 411 4998 - [email protected] - www.unitar.org/unosat
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TONGATongatapu IslandImagery analysis: 15 February 2018 | Published 26 February 2018 | Version 1.0
Tropical CycloneTC20180209TON
This map illustrates satellite-detected buildingdamage assessment as of 15 February 2018,over the eastern part of the city of Nuku-alofa andthe town of Popua, Tongatapu Island, Tonga,following the passage of the tropical cycloneGITA-18. The analysis was conducted using apost-event Pleiades image as of 15 February2018 and a pre-event WorldView-3 image as of12 January 2018. UNITAR-UNOSAT analysisidentified 637 potentially damaged structureswithin the area. According to the pre-eventbuilding footprints provided by Open Street Map,this represents 27% of the total number ofbuildings analyzed. Some areas have beenaffected by floods, such as the coast east ofNuku-alofa and the town of Popua. Here,buildings surrounded by floodwater areconsidered as potentially damaged. Overall, thesatellite detected damage level was severe, inthis part of the island. This is a preliminaryanalysis and has not yet been validated in thefield. Please send ground feedback to UNITAR -UNOSAT
¥¦¬Nuku'alofa
'Eua
Tongatapu
The depiction and use of boundaries, geographic names and related data shown here are not warranted to be error-free nor do they implyofficial endorsement or acceptance by the United Nations. UNOSAT is a program of the United Nations Institute for Training and Research(UNITAR), providing satellite imagery and related geographic information, research and analysis to UN humanitarian & developmentagencies & their implementing partners. This work by UNITAR-UNOSAT is licensed under a CC BY-NC 3.0.
Damage Assessment of easternpart of Nuku-alofa, TongatapuIsland, Tonga
Satellite Data (Post): PleiadesImagery Date: 15/02/2018Resolution: 50 cmCopyright: CNES 2018 DistributionAirbusDefence and SpaceSource: Airbus Defence and Space
Satellite Data (Pre): WorldView-3Imagery Date: 12/01/2018Resolution: 31 cmCopyright: DigitalGlobe, IncSource: USGS-HDDS
Road data & building footprints :OpenStreetMap contributors(12/02/2018)Analysis : UNITAR - UNOSATProduction: UNITAR - UNOSAT
!IMap Scale for A3: 1:14,000
Analysis conducted with ArcGIS v10.4.1Coordinate System: WGS 1984 UTM Zone 1SProjection: Transverse MercatorDatum: WGS 1984Units: Meter
Map location
INSET: 10 May 2015INSET 2: 12 January 2018
Æ5
INSET 1: 15 February 2018
Legend") Damaged building
Road
See insets 3 and 4 for close-up view of flooded buildings
INSET 3: 15 February 2018 INSET 4: 12 January 2018
See insets 1 and 2 for close-up view of damaged & destroyed structures
Popua49%
Nuku-alofa
