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FEMA Flood Hazard Areas Feature Layer

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hamhanding - ArcGIS Online2026-05-19 收录
下载链接:
https://hamhanding-dcdev.opendata.arcgis.com/datasets/ChesBay::fema-flood-hazard-areas-feature-layer
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<p><strong>Open the Data Resource:</strong> <a target='_blank' href='https://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/USA_Flood_Hazard_Reduced_Set_gdb/FeatureServer' rel='nofollow ugc noopener noreferrer'>https://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/USA_Flood_Hazard_Reduced_Set_gdb/FeatureServer</a></p><p>The Flood Hazard Areas Feature Layer displays Flood Hazard Areas from the Flood Insurance Rate Map created by the Federal Emergency Management Agency (FEMA). FEMA produces Flood Insurance Rate maps and identifies Special Flood Hazard Areas as part of the National Flood Insurance Program's floodplain management. Special Flood Hazard Areas have regulations that include the mandatory purchase of flood insurance.</p><p>This layer is derived from the October 5, 2022, version of the National Flood Hazard Layer feature class S_Fld_Haz_Ar. The data were aggregated into eight classes to produce the Esri Symbology field based on symbology provided by FEMA. All other layer attributes are derived from the National Flood Hazard Layer. The layer was projected to Web Mercator Auxiliary Sphere, then the repair geometry geoprocessing tool was run on it. Its resolution was set to 0.0001 meter. To improve performance Flood Zone values "Area Not Included", "Open Water", "D", "NP", and No Data were removed from the layer. Areas with Flood Zone value "X" subtype "Area of Minimal Flood Hazard" were also removed. An imagery layer created from this dataset provides access to the full set of records in the National Flood Hazard Layer.</p><p>A <a target='_blank' href='https://www.arcgis.com/home/item.html?id=fedc7c080e7f434186e0e623e0062c5b' rel='nofollow ugc noopener noreferrer'>web map featuring this layer</a> is available for you to use.</p>
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FEMA
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