Tropical_Storm_Gita/ARIA_Damage_Proxy_Map_TC

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Service Description: The Advanced Rapid Imaging and Analysis (ARIA) team at NASA's Jet Propulsion Laboratory and California Institute of Technology created this Damage Proxy Map (DPM) depicting Tongatapu, the main island of Tonga, that are likely damaged (shown by red and yellow pixels) as a result of Cyclone Gita (Category 4, hit Tonga from late Feb 12 to early Feb. 13, 2018). The map was derived from synthetic aperture radar (SAR) images from the COSMO-SkyMed satellites, operated by the Italian Space Agency (ASI). The images were taken before the event on Jan. 19, and again on Feb. 13, 2018, just 4-1/2 hours after the peak damage by the cyclone. The map covers the entire island of Tongatapu (the 40-by-40 km SAR image footprint indicated with the large red polygon). Each pixel measures about 30 meters across. The color variation from yellow to red indicates increasingly more significant ground surface change. Preliminary validation was done by comparing with high-resolution optical imagery acquired by the DigitalGlobe. This damage proxy map should be used as guidance to identify damaged areas, and may be less reliable over vegetated areas and flooded areas. This research was carried out at JPL under a contract with NASA. Original data COSMO-SkyMed Product - ©ASI - Agenzia Spaziale Italiana - (2018) For more information about ARIA, visit: http://aria.jpl.nasa.gov

Name: Tropical_Storm_Gita/ARIA_Damage_Proxy_Map_TC_Gita

Description: The Advanced Rapid Imaging and Analysis (ARIA) team at NASA's Jet Propulsion Laboratory and California Institute of Technology created this Damage Proxy Map (DPM) depicting Tongatapu, the main island of Tonga, that are likely damaged (shown by red and yellow pixels) as a result of Cyclone Gita (Category 4, hit Tonga from late Feb 12 to early Feb. 13, 2018). The map was derived from synthetic aperture radar (SAR) images from the COSMO-SkyMed satellites, operated by the Italian Space Agency (ASI). The images were taken before the event on Jan. 19, and again on Feb. 13, 2018, just 4-1/2 hours after the peak damage by the cyclone. The map covers the entire island of Tongatapu (the 40-by-40 km SAR image footprint indicated with the large red polygon). Each pixel measures about 30 meters across. The color variation from yellow to red indicates increasingly more significant ground surface change. Preliminary validation was done by comparing with high-resolution optical imagery acquired by the DigitalGlobe. This damage proxy map should be used as guidance to identify damaged areas, and may be less reliable over vegetated areas and flooded areas. This research was carried out at JPL under a contract with NASA. Original data COSMO-SkyMed Product - ©ASI - Agenzia Spaziale Italiana - (2018) For more information about ARIA, visit: http://aria.jpl.nasa.gov

Single Fused Map Cache: false

Extent:

Initial Extent:

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Pixel Size X: 1.388888824718442E-4

Pixel Size Y: 1.3888890119014694E-4

Band Count: 4

Pixel Type: U8

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Mensuration Capabilities: Basic

Has Histograms: false

Has Colormap: false

Has Multi Dimensions : false

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Copyright Text: ARIA/NASA/JPL-Caltech Product

Service Data Type: esriImageServiceDataTypeGeneric

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Mean Values: N/A

Standard Deviation Values: N/A

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Fields: None

Default Mosaic Method: Center

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Mosaic Operator: First

Default Compression Quality: 75

Default Resampling Method: Bilinear

Max Record Count: null

Max Image Height: 4100

Max Image Width: 15000

Max Download Image Count: null

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Allow Raster Function: true

Allow Copy: true

Allow Analysis: true

Allow Compute TiePoints: false

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Child Resources: Info Statistics Key Properties Legend Raster Function Infos

Supported Operations: Export Image Identify Measure Compute Histograms Compute Statistics Histograms Get Samples Compute Class Statistics Query Boundary Compute Pixel Location Compute Angles Validate Project

Tropical_Storm_Gita/ARIA_Damage_Proxy_Map_TC_Gita (ImageServer)