The picture above is a representation of how LIDAR (Light Detection and Ranging) mapping was used to map the vegetation at the Assateague Island National Seashore.
As stated by the USGS:
"LIDAR Collection: The NASA Experimental Advanced Airborne Research Lidar (EAARL) collected georectified digital aerial photographs and high-resolution lidar data over Assateague Island. The instrument uses a green laser and a raster scanning mechanism to acquire lidar data. Researchers set up a GPS base station to precisely locate the position of the aircraft and the data it collected."
LIDAR technology is similar to radar in that it sends a signal, in this case from a laser, towards an area and records the time and frequency at which the laser beam reflects back to sensors which are manufactured to work with laser technology. LIDAR uses lasers similarly to RADAR, which uses radio waves. Because LIDAR technology allows for information to be retrieved faster and with more consistency than radar, the picture, or map, produced is much more clear and can show much more detail.
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