National Geodetic Survey damage assessment imagery available online. “From August 27-September 4, the National Geodetic Survey (NGS) collected damage assessment imagery in the aftermath of Hurricane Harvey. The aerial imagery was collected in specific areas identified by FEMA and the National Weather Service. You can access all of the images collected online. Select the round icon with directional arrows using your mouse (or your finger) and slide back and forth to view a “before and after” comparison. “Before” images are provided by Mapbox, Digital Globe, and OpenStreetMap; “After” images were captured by NOAA’s National Geodetic Survey in the aftermath of Hurricane Harvey.”