The Hydrographic Society of America - Houston Chapter's March Technical Meeting
Location: Online - Register for meeting link
Speaker - Marcus Kwasek - QPS
Title: Beyond point clouds, 3D polygonal meshes for discovery of new features in marine datasetsAdditional Info: When using dense, high precision survey data, the choice of methods for management and visualization of the data can have a large impact on the final decision making process. This is an important factor when planning marine site investigations and asset inspections, as there are significant trade-offs with traditional approaches. Gridded surfaces, even with variable resolution, are inherently a 2.5 dimensional data structure and cannot adequately model complex overlapping or vertical structures. Alternatively, point clouds can represent any shape or structure, but by themselves pose challenges for visualization and quantitative analysis. To address these limitations and bridge the benefits of both point clouds and gridded surfaces, we investigated using 3D polygonal meshes to improve the speed and quality of visual analysis. In addition, the 3d meshes provide new methods for quantitative change detection and monitoring. The new techniques were applied to point datasets acquired from underwater laser scanning, multibeam data, and photogrammetry.
About the Speaker: Marcus Kwasek spent 7 years performing geophysical, geotechnical, and environmental surveys with a variety of equipment. He used this equipment to analyze and interpret geological features above and below the seafloor. His strong background in fish/invertebrate zoology and morphology enabled him to perform various environmental surveys (i.e. grab sampling, acoustic tagging, trawl sampling, etc.). Marcus currently works in technical support at QPS providing support and training for clients using QPS navigation and processing software.