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Tuesday, October 30 • 4:30pm - 5:00pm
Natural Resources #2 Track. Change Detection in Coastal Geomorphology using LiDAR Data

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AUTHORS: Patrick Cunningham, Blue Marble Geographics

ABSTRACT: Technology improvements over recent years have seen the cost of LiDAR data acquisition decrease and consequently the coverage and availability expand dramatically. As a consequence, point cloud data is increasingly used as the raw material for precise measurement and visualization of change over time. Nowhere is this process more evident than in coastal areas where shifting patterns of erosion and deposition can have devastating effects on shoreline communities. In this this presentation, we will examine an area on the coast of the state of Maine that has been subject to significant beach erosion. Using point cloud data collected over a five-year time period, we will explore the procedure whereby the raw data can be edited, filtered, reclassified, and gridded to create a time series of precise bare-earth models. These DTM files form the basis of the subsequent terrain analysis procedures, which can be conducted using a number of different tools, including ArcGIS 3D Analyst and Global Mapper. In the final step of this workflow, we will calculate the volume difference between two surface models representing the beginning and end of the time series and visually represent these differences to show areas of significant erosion or deposition. This difference model can ultimately be rendered as a 3D display in ArcScene.

Tuesday October 30, 2018 4:30pm - 5:00pm EDT
Broadway 1&2

Attendees (2)