| snippet:
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Areas of potential flood hazard identified from FEMA National Flood Hazard Layer, for Orange County, California |
| summary:
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Areas of potential flood hazard identified from FEMA National Flood Hazard Layer, for Orange County, California |
| accessInformation:
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Dr. Kostas Alexandridis, GISP, Data Scientist, OC Public Works, OC Survey Geospatial Services for the Orange County data and project extent processing. Original data from FEMA Flood Insurance Rate Maps, and ESRI Living Atlas. |
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thumbnail/thumbnail.png |
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18055.954822 |
| typeKeywords:
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["ArcGIS Server","Data","Image Service","Service"] |
| description:
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<div style='text-align:Left;'><div><div><p><span>The Federal Emergency Management Agency (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 for holders of federally regulated mortgages. In addition, this layer can help planners and firms avoid areas of flood risk and also avoid additional cost to carry insurance for certain planned activities.</span></p><p><span>This layer is derived from the May 7, 2025 version Flood Insurance Rate Map feature class S_FLD_HAZ_AR. The vector data were then flagged with an index of 94 classes, representing a unique combination of values displayed by three renderers. (In three resolutions the three renderers make nine processing templates.) Repair Geometry was run on the set of features, then the features were rasterized using the 94 class index at a resolutions of 10, 30, and 90 meters, using the Polygon to Raster tool and the "MAXIMUM_COMBINED_AREA" option. </span></p><p><span>Projection: Web Mercator Auxiliary Sphere</span></p><p><span>Data Coordinate System: USA Contiguous Albers Equal Area Conic USGS version (contiguous US, Puerto Rico, US Virgin Islands), WGS 1984 Albers (Alaska), Hawaii Albers Equal Area Conic (Hawaii), Western Pacific Albers Equal Area Conic (Guam, Northern Mariana Islands, and American Samoa)</span></p><p><span>Cell Sizes: 10 meters (default), 30 meters, and 90 meters</span></p><p><span>Data Date: May 7, 2025; Version: 2026.1, Updated: March 2026</span></p></div></div></div> |
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<div style='text-align:Left;'><div><div><p><span>The feed data and associated resources (maps, apps, endpoints) can be used under a <a href="https://creativecommons.org/licenses/by-sa/3.0/" target="_blank">Creative Commons CC-SA-BY</a> License, providing attribution to OC Public Works, OC Survey Geospatial Services. <div><br /></div><div>We make every effort to provide the most accurate and up-to-date data and information. Nevertheless the data feed is provided, 'as is' and OC Public Work's standard <a href="https://www.ocgov.com/contact-county/disclaimer" target="_blank">Disclaimer</a> applies.</div><div><br /></div><div>For any inquiries, suggestions or questions, please contact:</div><div><br /></div><div style="text-align:center;"><a href="https://www.linkedin.com/in/ktalexan/" target="_blank"><b>Dr. Kostas Alexandridis, GISP</b></a><br /></div><div style="text-align:center;">GIS Analyst | Spatial Complex Systems Scientist</div><div style="text-align:center;">OC Public Works/OC Survey Geospatial Applications</div><div style="text-align:center;"><div>601 N. Ross Street, P.O. Box 4048, Santa Ana, CA 92701</div><div>Email: <a href="mailto:kostas.alexandridis@ocpw.ocgov.com" target="_blank">kostas.alexandridis@ocpw.ocgov.com</a> | Phone: (714) 967-0826</div></div</span></p></div></div></div> |
| catalogPath:
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| title:
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OCFloodHazardAreas |
| type:
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Image Service |
| url:
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https://www.ocgis.com/uav/ |
| tags:
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["Orange County","California","flood zone","flood hazard","hazard","sfha","flood zones","100-year flood","500-year flood","flood risk","floodplain","floodplains","FEMA","NFHL","flood plain","DFIRM","special flood hazard area","flood insurance","landscape hazards","flooding"] |
| culture:
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en-US |
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| name:
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OCFloodHazardAreas |
| guid:
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| minScale:
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2311162.217155 |
| spatialReference:
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WGS_1984_Web_Mercator_Auxiliary_Sphere |