PROJECT TOPIC]
Lidar, which stands for “light detection and ranging,” is the 21st-century version of George Washington’s surveyor’s compass and chain. Unlike aerial photography, lidar shows not only vegetation and objects on the land’s surface, but the structures beneath.
With lidar images, a forester can gauge the yield
of a stand of trees. A solar power entrepreneur
can estimate the energy reflectance of rooftops.
A vehicle designer can improve fuel efficiency with
technology that uses elevation data to determine
when transmissions should upshift or downshift.
A structural engineer can study an aging bridge
for signs of potential failure.
Lidar mapping is usually done to meet specific needs:
private companies conduct data-gathering flights and
provide information to business and government clients.
Clients’ requests and company practices determine what
areas are mapped, how accurately and how often, and how data are analyzed, used, stored, and shared. The result
is a crazy quilt that, in 2014, included high-quality lidar coverage of less than one-sixth of the lower 49 States and territories.
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