SOUTH LOUISIANA - Images from the National Geodetic Survey are being used to help assess the damage after historic flooding came to southern Louisiana last weekend.

On Aug. 14, NGS started collecting aerial images in specific areas that have already been identified by FEMA and the National Weather Service.

The before images were gathered by Mapbox, Digital Globe and OpenStreetMap.

A few of the images they collected are above. Click through the slideshow or use your arrow keys to see before and after aerial images.

More photos from Abbeville, Denham Springs and Port Vincent are available here.

NGS says the aerial images were captured by a team of NOAA aviators using specialized remote-sensing cameras aboard NOAA's King Air aircraft flying above the areas at altitudes ranging from 2000 to 3000 feet.