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<p>Developed to assist emergency management officials in hurricane preparedness and operations, this layer represents worst-case Hurricane Surge Inundation areas for Category 1 through 4 hurricanes striking the coast of Massachusetts. Hurricane surge values were developed by the <a href='https://www.nhc.noaa.gov/' rel='nofollow ugc'>National Hurricane Center</a> using the PV2 basin <a href='https://www.nhc.noaa.gov/surge/slosh.php' rel='nofollow ugc'>SLOSH</a> (Sea Lake and Overland Surge from Hurricanes) Model data.</p><p>This Surge Inundation layer was created by the U.S. Army Corps of Engineers, New England District. Using ArcInfo's Grid extension, LiDAR bare earth elevation data were subtracted from the worst-case hurricane surge values to determine which areas could be expected to be inundated.</p>

<p>The legend used in this tile service is as follows:</p><p><img alt='Hurricane category legend' src='https://www.mass.gov/files/documents/2023/09/05/HurrCats.png' /></p><p>Please see <a href='https://www.mass.gov/info-details/massgis-data-hurricane-surge-inundation-zones' rel='nofollow ugc'>https://www.mass.gov/info-details/massgis-data-hurricane-surge-inundation-zones</a> for more details.</p><p>For tile services that symbolize successive categories with one color, see:</p><p>

</p><ul><li><a href='https://massgis.maps.arcgis.com/home/item.html?id=5277880c012b4b78825bbfdb07748644' rel='nofollow ugc'>Hurricane Surge Inundation Zones (Category 1 - Mass. Coast)</a></li><li><a href='https://massgis.maps.arcgis.com/home/item.html?id=c6766c91ae544bb4b8a52504ca1d8762' rel='nofollow ugc'>Hurricane Surge Inundation Zones (Categories 1 &amp; 2 -
Mass. Coast)</a></li><li><a href='https://massgis.maps.arcgis.com/home/item.html?id=d608061fc72b43759eb642a15cb50d8f' rel='nofollow ugc'>Hurricane Surge Inundation Zones (Categories 1, 2 &amp; 3 -
Mass. Coast)</a></li><li><a href='https://massgis.maps.arcgis.com/home/item.html?id=b0c5dbb708ce4a94a384660555e295ca' rel='nofollow ugc'>Hurricane Surge Inundation Zones (Categories 1, 2, 3 &amp; 4
- Mass. Coast)</a></li></ul>
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{'title': 'Hurricane Surge Inundation Zones', 'author': 'MassGIS', 'comments': '', 'subject': 'Hurricane Surge Inundation Zones for Massachusetts coastal areas. This tile service,  hosted by MassGIS, displays categories 1 through 4, each symbolized with a different color.', 'category': '', 'keywords': 'Hurricane, Surge, Inundation Zones, Massachusetts, MassGIS', 'credits': '', 'Title': '', 'Author': '', 'Comments': '', 'Subject': '', 'Category': '', 'AntialiasingMode': 'Best', 'TextAntialiasingMode': 'Force', 'Keywords': ''}
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