Laser Leveling

What is Laser Leveling?

Laser leveling is a procedure to collect data concerning the visible shape of geographic features.  A transmitter is positioned and "zeroed" at a recorded point.  Then, a receiver is positioned at various points, often in a grid corresponding to the transmitter.  The receiver is moved up and down into the plane defined by the rotating laser.  The difference in height between the transmitter and receiver is then recorded.  A grid of points (with + or - values) can then be used to produce an image of the surface measured.

Erin and Bob positioning the laser leveling receiver along a transect.  The data collected along each transect is used to calibrate the GPR readings and form the top of a cross-sectional view of the sands at Hapuna Beach.

Why collect Laser Level data Hapuna Beach?

Since the surface "zero point" of a GPR survey is not recorded by the GPR system itself, it is necessary to measure the surface features by other means.  A laser leveling system is currently one of the most accurate means to gather such data.  Then, by combining the data from the two systems, a final and accurate three-dimensional model of the beach can be created.  The model can be used to extrapolate other data.  See Ground Penetrating Radar for more information.

Erin and Bob take measurements through the dunes along the final tarnsect at Hapuna Beach

GPS, GPR, Laser Leveling, Biogeography, Luau, Return to Hapuna Beach Contents