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.
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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.
I'm currently testing out the Attachment Viewer configurable app in ArcGIS Online as a replacement for the "classic" Shortlist storymap template. It looks like the app should be perfect for our purposes - an image-focused layout with a map to provide geographic context. However, I can't seem to get the app to work with the test data that I've cobbled together so far. When previewing, I get the "No attachments found" message, and when I open the builder, a small warning box says, "This application requires a layer that supports attachments and has 'supportsQueryAttachments' set to true."
The only thing I'm aware of that I'm doing differently from the tutorials and walkthroughs I've found is that the attachments aren't being created using any of Esri's field collection apps. I used the Enable Attachments and Add Attachments tools in ArcGIS Pro to add the image attachments to the layer in an offline file geodatabase before uploading that layer to AGO.
The important details: Esri is aware that the Attachment Viewer app in ArcGIS Online is basically broken at the moment. The don't have a timeline for fixing it, but you can get around it if you can host the code on your own server.
The workaround: Download the source code from Github ( -viewer). Copy your AGO app's App ID into the quote marks on the "appid" line in dist\config\application.json and save the file. Copy the contents of the dist folder to your web server, and it should work.
From what I can see, it looks like the issue is that the latest version of the Attachment Viewer app is broken on AGO. The Github version seems to have been rolled back to an earlier version that actually works, but for whatever reason, they didn't do the same with the default code used by AGO. I'm making a few assumptions that may not be safe, but that's the best guess I have for what's going on.
Looking at the webmap that feeds it ( =ab97b957fa084484835cfcab0925f5b3), it seems like they had to create an Arcade expression to format links differently from however attachments do them by default. It's still using images attached to the feature service, but the URL is built from values stored in the feature table, which looks like it would be a ton of manual work to set up.
Thank you for this post! I took a closer look at the app code and found that there is some app logic that once worked with a previous version of the 4.x ArcGIS API for JavaScript, but no longer does. This issue will be addressed and your app should be able to load attachments tomorrow night, once the June 2021 ArcGIS Online update takes place.
This post Re: Attachment Viewer app - Esri Community suggests the attachments have to be on the feature table. Does this mean the Attachment Viewer won't work with hosted feature layers which have had attachments enabled from within ArcGIS Online?
Thanks Ryan. It's an ArcGIS Online Hosted Feature Layer with Attachments enabled so I think it meets the data requirements. It's not a public layer so I'll need your username to invite you to the Group.
Since 2001, the USGS Global Visualization Viewer (GloVis) has been available to users for accessing remote sensing data. In 2017, it was redesigned to address changing internet technologies. With easy-to- use navigation tools, users can instantly view and download scenes.
This viewer allows you to: Use existing EROS Registration System (ERS) credentials to sign in Narrow down results by limiting your parameters on the Interface Control View multiple scenes at once and step through time using the controls in the lower right-hand corner View metadata and download the full-band source imagery Adjust settings to customize the user experience 152ee80cbc
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