LiDAR stands for Light Detection and Ranging. As part of the
Tropical Storm Allison Recovery Project, highly detailed ground
elevation data for all of Harris County was acquired through this
cutting-edge technology that utilizes the projection of millions of
laser signals to the ground from a specially equipped aircraft. Using
powerful software, the data from these LiDAR reflections is collected by
measuring the time it takes for the aircraft to receive each of the
millions of laser reflections. The resulting data is then combined and
converted into an image that looks exactly like the terrain below,
including buildings, trees, roadways, creeks and bayous.
In order to identify areas of higher flood risk, engineers need a
detailed and accurate representation of the shape of the ground. It is
just not economical to obtain such detailed information for an area as
large as Harris County using conventional survey methods. But LiDAR
makes it possible.
The LiDAR data is combined with surveyed creek and bayou cross
sections in order to develop detailed computer simulations to determine
an estimate of areas that have a higher risk of flooding.
LIDAR helps to provide a better understanding of flooding and is a benefit to every citizen in Harris County