teflonscout writes: The Wired Science blog is running a story about the people, gear, and plane behind an effort to find redwood trees taller than the world record of 379 feet. Two technicians and a pilot from Sanborn Mapping Company slowly sweep across Redwood National Park in a raster pattern. They use LIDAR to gather 85,000 3D data points per second, creating a map with less than 0.5 meter resolution. This means that they can even identify individual tree species with the almost photolike data. Since the LIDAR laser beams can slip between tree branches, an image of the forest floor and treetops can be constructed. By subtracting the height of the forest floor from the trees, the heights of the trees can be calculated with tremendous accuracy. Once a grove of tall trees has been identified, Professor Steven C. Sillett of Humboldt State University will send his students into the forest to verify the heights of the giant trees.