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The FEMA 100 Year Flood Zones layer contains flood zone values A, AE and AO.  This data layer is FEMA's official National Flood Hazard Layer for Chester County.  The effective date is 9/29/2017.
Search relevance: 318.28 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 06:58 PM -
 According to FEMA the definition of a flood zone is a "geographic areas that FEMA has defined according to varying levels of flood risk and type of flooding. These zones are depicted on the...
Search relevance: 255.08 | Views last month: 6 | Catalog Last Checked: September 10, 2026 at 07:06 PM -
This is a dataset download, not a document. The Open button will start the download.This data layer is an element of the Oregon GIS Framework. This feature dataset contains the following feature...
Search relevance: 160.24 | Views last month: 4 | Catalog Last Checked: September 10, 2026 at 06:40 PM -
This is a map service for the Coastal Flood Hazard Composite dataset. This dataset was created by combining hazard zones from the following datasets: FEMA V zones, FEMA A zones, FEMA shaded X...
Search relevance: 88.80 | Views last month: 8 | Catalog Last Checked: August 02, 2026 at 11:36 PM -
The New York City Hurricane Evacuation Zones represent varying threat levels of flooding resulting from storm surge. New York City's hurricane contingency plans are based on six evacuation...
Search relevance: 80.91 | Views last month: 12 | Catalog Last Checked: November 03, 2026 at 11:33 PM -
This is a dataset download, not a document. The Open button will start the download.This data layer is an element of the Oregon GIS Framework. This feature dataset contains the following feature...
Search relevance: 76.24 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 06:40 PM -
The critical facilities data are derived from the USGS Structures Inventory Database (June, 2016). The structures in the derived dataset displays aggregated totals of law enforcement facilities,...
Search relevance: 72.93 | Views last month: 7 | Catalog Last Checked: August 02, 2026 at 11:31 PM -
The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the...
Search relevance: 63.37 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 07:03 PM -
The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the...
Search relevance: 63.30 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 07:09 PM
