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Correction of elevation offsets in multiple co-located lidar datasets

April 7, 2017


Topographic elevation data collected with airborne light detection and ranging (lidar) can be used to analyze short- and long-term changes to beach and dune systems. Analysis of multiple lidar datasets at Dauphin Island, Alabama, revealed systematic, island-wide elevation differences on the order of 10s of centimeters (cm) that were not attributable to real-world change and, therefore, were likely to represent systematic sampling offsets. These offsets vary between the datasets, but appear spatially consistent within a given survey. This report describes a method that was developed to identify and correct offsets between lidar datasets collected over the same site at different times so that true elevation changes over time, associated with sediment accumulation or erosion, can be analyzed.

Publication Year 2017
Title Correction of elevation offsets in multiple co-located lidar datasets
DOI 10.3133/ofr20171031
Authors David M. Thompson, P. Soupy Dalyander, Joseph W. Long, Nathaniel G. Plant
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Open-File Report
Series Number 2017-1031
Index ID ofr20171031
Record Source USGS Publications Warehouse
USGS Organization St. Petersburg Coastal and Marine Science Center