How to use the National Geodetic Survey's online viewer to explore aerial images following major natural disasters.
Video overview of how to use the NOAA Emergency Response Imagery online viewer.
As soon as weather permits following major natural disasters, the National Geodetic Survey begins aerial survey missions to assess damages to affected areas. Typical weather-related events include hurricanes, tornadoes, and floods. NGS responds to other events, such as oil spills, as well. Directly georeferenced-imagery data are collected, rapidly processed, and made available via open-source Geographic Information Systems (GIS). These data and images provide emergency and coastal managers with information needed to develop recovery strategies, facilitate search and rescue efforts, identify hazards to navigation and HAZMAT spills, locate errant vessels, and provide documentation necessary for damage assessment through the comparison of before-and-after imagery. Images are also available to view and download by the general public as a tool to assess impacts to their homes and community.
Emergency Response Imagery Mobile Web App
This web application allows emergency responders and the public to quickly access images of disaster-impacted areas collected by NOAA aircraft using standard web browsers, iOS, or Android mobile devices.
Tips for using the NGS Emergency Response Imagery Viewer:
1. Zoom in/out. Plus and minus buttons are located in the top left corner of the image viewer. Tap or click on the appropriate symbol to control the zoom level of the map. The dynamic map zooms in or out from the center point. You can change the location of the map by dragging on the map with your finger or using your fingers on a mobile device.
2. Search for a specific location. Underneath the zoom controls in the upper left corner, you will find a magnifying glass. Use this tool to search for a specific location.
3. Available Imagery. Available NOAA imagery may be difficult to see when you first look at a map. Here, you can see the available aerial imagery near Houston, Texas. If you don't see any images on the map, try zooming in closer to the area you are interested in inspecting or search for a specific location.
4. Available images, listed by date collected by NOAA aircraft. On the top right corner of the map viewer, you will see an icon with three stacked rectangles, which indicates available map layers. Select this button to toggle the view of the base layer of the map between street view and satellite view. This button also reveals a list of all available imagery, listed by the date the images were collected by NOAA aircraft.
For Advanced Users: Note that users may construct a custom URL for the imagery viewer by entering a known latitude and longitude in decimal degrees, along with a selected zoom level. For example, the following link will show Wilmington International Airport (ILM) in North Carolina. This URL will be "zoomed in" to level 16, which equates to about 2.4 meter resolution, at the coordinates for the airport, 34.2674 degrees latitude and -77.9020 degrees longitude: https://storms.ngs.noaa.gov/storms/michael/index.html#16/34.2674/-77.9020