Hurricane Evacuation Areas

This hosted feature layer has been published in RI State Plane Feet NAD 83. Evacuation areas based upon worst case hurricane surge scenarios for category 1 through 4 hurricanes striking the coast of Rhode Island. Hurricane surge values were developed by the National Hurricane Center using the SLOSH (Sea Lake and Overland Surge from Hurricanes) Model. This Surge Inundation layer was created by the U.S. Army Corps of Engineers, New England District. Using ArcInfo's Grid extension, bare earth elevation data from several sources was subtracted from the worst-case hurricane surge values to determine which areas could be expected to be inundated. This layer was developed to assist emergency management officials in hurricane preparedness and operations. This statewide dataset compiled from county-based datasets originally developed and published by the US Army Corps of Engineers.本托管要素图层（hosted feature layer）采用罗德岛州（Rhode Island, RI）州平面英尺坐标系及北美大地基准1983（North American Datum 1983, NAD 83）发布。图层展示了袭击罗德岛州海岸的1至4级飓风在最坏情形风暴潮情景下对应的疏散区域。风暴潮数值由美国国家飓风中心（National Hurricane Center）通过SLOSH（飓风海洋、湖泊与陆上风暴潮模型，Sea Lake and Overland Surge from Hurricanes）模型计算得出。本风暴潮淹没图层（Surge Inundation layer）由美国陆军工程兵团新英格兰分局（U.S. Army Corps of Engineers, New England District）制作：依托ArcInfo的Grid扩展模块，研究团队将多源裸地高程数据与最坏情形飓风风暴潮数值相减，以此测算可能发生淹没的区域。本图层的开发旨在协助应急管理人员开展飓风防灾准备与应急处置工作。本全州范围数据集由美国陆军工程兵团先期开发发布的县级数据集整合而来。