This application is powered by ArcGIS for Server.
ArcGIS Online Basemaps
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Streetmap—This street map includes highway-level data for the world and street-level data for the United States, Canada, Japan, southern Africa, and a number of countries in Europe and elsewhere.
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Satellite Imagery—This map presents satellite imagery for the world and high-resolution (1m or better) imagery for the United States, Great Britain, and other areas around the world
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Topographic Map—This map includes administrative boundaries, cities, water features, physiographic features, parks, landmarks, highways, roads, railways, airports, and buildings overlaid on land cover and shaded relief imagery for added context.
Layers
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Observed flooding: Observed flood data is provided by NOAA NWS and shows flood stages categorized as major, moderate, minor, and near flood stage. The data feed is updated every 15 minutes.
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Flood Warnings: Flood warning data is provided by NOAA National Weather Service (NWS). Streams/rivers designated with flood warning pose a serious threat to life or property. The data is downloaded from NOAA and parsed using the Aggregated Live Feeds methodology to take the returned information and serve the data through ArcGIS Server as a map service.
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Precipitation: We use Televent/DTN MxInsight software to download current precipitation from a DTN/Meteorlogix FTP server. We then use the Aggregated Live Feeds methodology to take the returned shapefiles serve the data through ArcGIS Server as a map service.
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YouTube Videos: The videos are added to the application using the YouTube API. The YouTube data API allows you to request videos given a latitude and longitude position along with a search radius and keywords. From here we parse the response from YouTube and use the coordinates with each returned record to draw the point and incorporate the results into the ArcGIS API for JavaScript InfoWindow.
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Tweets: The Twitter API is used to identify tweets that match a specified query and area. In this case, only the tweets that return a coordinate value within the current visible map extent are added to the map. The Twitter API sends the results of the query back to the application as JSON which is easily incorporated into the ArcGIS API for JavaScript.
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Flickr: The Flickr API is used to identify Flickr photos that match search terms and a collection of other parameters identified in the Flickr API help pages. The Flickr API sends the results of the query back to the application as JSON which is easily incorporated into the ArcGIS API for JavaScript.
Web Developers
The Web Mapping APIs are an efficient way to utilize mapping, geocoding, and geoprocessing services provided by ArcGIS for Server and ArcGIS Online. Get started with the ArcGIS Web Mapping APIs to create your own applications.