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From the White Mountains in Alaska to the Jupiter Inlet Lighthouse in Florida, map and geospatial products inform our management decisions. A growing selection of those maps are available for your public lands adventures and business.
The FEMA Flood Map Service Center (MSC) is the officialpublic source for flood hazard information produced in support ofthe National Flood Insurance Program (NFIP). Use the MSC to findyour official flood map, access a range of other flood hazardproducts, and take advantage of tools for better understandingflood risk.
FEMA flood maps are continually updated through a variety ofprocesses. Effective information that you download or print fromthis site may change or become superseded by new maps over time.For additional information, please see the FloodHazard Mapping Updates Overview Fact Sheet
The Search All Products page has been recently updated to allow users to download a listing of all products resulting from a search. Users can print the file or import it into a spreadsheet or database.
There is not 100% confidence in the elevation data and/or mapping process. It is important not to focus on the exact extent of inundation, but rather to examine the level of confidence that the extent of inundation is accurate (see mapping confidence tab).
The four relative sea level rise (RSL) scenarios shown in this tab are derived from the 2022 Sea Level Rise Technical Report using the same methods as the U.S. Army Corps of Engineers Sea Level Change Curve Calculator. These new scenarios were developed by the U.S. Sea Level Rise and Coastal Flood Hazard Scenarios and Tools Interagency Task Force as input into the U.S. Global Change Research Program Sustained Assessment process and, Fifth National Climate Assessment. These RSL scenarios provide an update to the NOAA 2017 scenarios, which were developed as input to the Fourth National Climate Assessment.
Note: We do not show the low scenario, as it is a continuation of the current global trend since the early 1990s and has been determined to have a low probability of occurring by 2100. Furthermore, this scenario would be associated with low levels of risk even if it did occur.
Another important change from the 2017 scenarios is the exclusion of the extreme (2.5 meter) scenario. Based on the most recent scientific understanding, and as discussed in the IPCC AR6, the uncertain physical processes that could lead to much higher increases in sea level are now viewed as less plausible in the coming decades before potentially becoming a factor toward the end of the 21st century. A GMSL increase of 2.5 meters is thus viewed as less plausible and the associated scenario has been removed.
For almost all the scenarios, RSL rise is likely to be greater than the global average in the U.S. Northeast and the western Gulf of Mexico. In intermediate and low scenarios, RSL rise is likely to be less than the global average in much of the Pacific Northwest and Alaska. For high scenarios, RSL rise is likely to be higher than the global average along all U.S. coastlines outside Alaska.
A RSL-change adjustment to the current National Tidal Datum Epoch (1983-2001) will cause a minimal offset that may be needed for some applications. The USACE Sea Level Change Curve Calculator can correct for this offset.
The inundation areas depicted in the Sea Level Rise tab are not as precise as they may appear. There are many unknowns when mapping future conditions, including natural evolution of the coastal landforms (e.g., barrier island overwash and migration), as well as the data used to predict the changes. The presentation of confidence in these maps only represents the known error in the elevation data and tidal corrections.
Blue areas denote a high confidence of inundation, orange areas denote a high degree of uncertainty, and unshaded areas denote a high confidence that these areas will be dry given the chosen water level.
In this application 80% is considered a high degree of confidence such that, for example, the blue areas denote locations that may be correctly mapped as 'inundated' more than 8 out of 10 times. Areas with a high degree of uncertainty represent locations that may be mapped correctly (either as inundated or dry) less than 8 out of 10 times. For a detailed description of the confidence levels and their computation, see the methods document.
Predictions represent the potential distribution of each wetland type (see legend) based on their elevation and how frequently they may be inundated under each scenario. As sea levels increase, some marshes may migrate into neighboring low-lying areas, while other sections of marsh will change type or be lost to open water.
Note: We do not show the low scenario as it is a continuation of the current global trend since the early 1990s and has been determined to have a low probability of occurring by 2100. Furthermore, this scenario would be associated with low levels of risk even if it did occur.
The Social Vulnerability Index, which shows areas of high human vulnerability to hazards, is based on population attributes from Census 2010 (e.g., age and poverty) and the built environment. By looking at the intersection of potential sea level rise and vulnerable Census tracts, one can get an idea of how vulnerable populations might be affected by sea level rise. Dark red indicates tracts having a high vulnerability, and the lighter reds indicate decreasing vulnerability.
Click on a NOAA tide station icon in the map to see historical inundation events in flood days per year. The flood thresholds used in these plots are derived national flood thresholds from NOAA Technical Report NOS CO-OPS 086: Patterns and Projections of High Tide Flooding Along the U.S. Coastline Using a Common Impact Threshold. The derived thresholds used here provide a national definition of coastal flooding and impacts for quantifying and communicating risk. These thresholds may deviate from NWS impact thresholds which take into account local flood risk and are used to issue NWS coastal flood watches, warnings, and advisories.
The purpose of this map viewer is to provide federal, state, and local coastal resource managers and planners with a preliminary look at sea level rise and coastal flooding impacts. The viewer is a screening-level tool that uses best-available, nationally consistent data sets and analyses. Data and maps provided can be used at several scales to help estimate impacts and prioritize actions for different scenarios.
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Esri StoryMaps present complex scientific or safety information in easy-to-understand terms. They combine maps, narrative text, images, and multimedia with history, to transform data and products into interactive, visual narratives.
The REST services directory provides access to the GIS servers for NCEI map products. These servers contain service-level metadata, a variety of data visualization previews and download formats, and information for programmers and developers.
TNM Access Application Programming Interface (API) provides developers with programmatic access to historical topographic maps and US Topo as well as other geospatial data products of The National Map.
The newest USGS topo map web app gives the public the opportunity to create custom topographic maps on demand. The online application is called topoBuilder and the output maps are known as OnDemand Topos.
topoBuilder is a public web application released by the National Geospatial Program that enables users to request customized USGS-style topographic maps, known as an OnDemand Topo, that utilize the best available data from The National Map.
The U.S. Geological Survey's National Geospatial Program developed the GNIS in support of the U.S. Board on Geographic Names as the official repository of domestic geographic names data, the official vehicle for geographic names use by all departments of the Federal Government, and the source for applying geographic names to Federal electronic and printed products.
The maps listed on this page are available for public access and viewing by clicking the link. Current and historical fire perimeter maps can be found on Wildland Fire Open Data site. Real-time wildland fire situational information including fire perimeters, weather, and fire detections can be found on the Enterprise GeoSpatial Portal (EGP) map.
The National Interagency Fire Center is committed to making its information and communication technologies accessible to individuals with disabilities by meeting or exceeding the requirements of Section 508 of the Rehabilitation Act of 1973, as amended. To meet this commitment, we continue to monitor and update our content to make sure our documents meet these standards.
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