LIDAR

Source: http://nature.berkeley.edu/biometlab/fieldpics.html

LIDAR or light detection and ranging uses a laser to measure an object. This is another remote sensing technique, that can be used to make detailed surface images. This is a three-dimensional image of the canopy structure from a Savanna field study site created by using pulsed LIDAR. Not only does LIDAR capture elevation changes but also structures, in this case trees.