LIDAR systems can be used in airborne devices to extract highly detailed images of a surface. This is an remote sensing technology that measures the distance to a target by illuminating it with laser light in pulses. It is basically a laser-range finding system used to create images. From the data collected a 3-D image can be created. In the image above, the SHOAL system created an image of a reef tract. Colors closer to blue indicate a greater depth within the water and red indicated a lesser depth. It can only be used in this fashion from the air when used in shallow depths. The image above is showing the different depths of a reef off the coast of Hawaii. It also shows where the reef begins creating a shelf and a "hole" in the reef.
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