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Homeland Security

Using Data and Imagery in iCAV NextGen for Incident Management & Planning

iCAV NextGen and DHS Earth support incident management, infrastructure protection, and threat mapping activities by providing a geospatial context to view and analyze infrastructure data from multiple sources.

Geospatial Data Layers

iCAV NextGen provides access to more than 400 infrastructure data layers, as well as population data and real-time situational awareness data for infrastructure impact analysis. Users may also use their own data for added context and utility.

The foundational dataset in iCAV NextGen is provided by the Homeland Security Infrastructure Program, more commonly known as HSIP, which includes data layers representing the 18 critical infrastructure and key resources Sectors, national hazards, and base map layers.

Users also can select data from numerous other sources including:

  • Geospatial Multi-Agency Coordination Group (GeoMAC) wildfire data
  • Civil Air Patrol incident response digital photographs
  • The National Oceanic and Atmospheric Administration (NOAA) NexRad hurricane and severe weather information
  • National Geospatial-Intelligence Agency (NGA) worldwide population database and CitySphere imagery layers

If you have questions or feedback on specific data sets, please contact the relevant data source provider. Questions regarding HSIP data should be sent to


The data service provider determines how frequently the geospatial imagery is updated. For example, the foundational geospatial imagery layers in iCAV NextGen are updated annually, while the CitySphere imagery layers from NGA are updated on a more frequent basis.

Imagery is also updated on an event-driven basis, for example after a hurricane, wildfire, or other natural disaster. After an incident, the Environmental Protection Agency or the Civil Air Patrol takes images of the impacted area, that are made available via the iCAV suite of tools.

Resolution and Scale

The majority of iCAV imagery is visible at a one-meter resolution, meaning that users can visually identify objects one meter or larger in scale. For 133 U.S. cities, there is a one-foot color resolution, with a four- to six-inch resolution available in select areas.

If you are unable to see the assets in iCAV NextGen, you most likely need to zoom in closer to a specific area. As you focus in on a smaller area, assets such as power lines or cell phone towers will begin to appear.

Last Published Date: July 26, 2012
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