Mar 24 2020
10:30 am - 12:00 pm
Airborne Case Studies
Track Names: AIRBORNE CASE STUDIES, Tuesday 10:30 - 12:00
Session Date: Mar 24 2020 10:30 am - 12:00 pm
Using LiDAR Technology for Wildfire Risk Mitigation
10:30 AM - 10:45 AM
California has long been struck by devastating wildfires fires, mainly due to an abundance of dry vegetation that acts as fuel once the fire season gets underway. This combined with the acceleration of the Santa Ana winds can have devastating effects once a fire breaks out. Between June 2014 and June 2017, more than 2000 fires were reported by California’s utility companies as a result of sparks from electrical equipment. To lessen the gravity of this potential danger, San Diego Gas and Electric (SDG&E) began a program known as the Fire Risk Mitigation Initiative (FiRM) to ‘harden’ the critical areas in their service area most at risk of wildfires. This effort, started in 2014, includes replacing older overhead distribution line elements using advanced technology and improving the system to adequately handle known weather conditions. The overhead electrical asset network of San Diego Gas and Electric (SDG&E) consists of over 10,000 distribution and transmission line miles. The objective of the program is to enhance the safety and reliability of the distribution system, improve electric system performance during extreme weather conditions, and reduce cost and environmental impacts for future maintenance activities. As part of the program, SDG&E undertook high resolution aerial LiDAR data collection of the entire service territory, data was collected using a topographic LiDAR system mounted to the underside of a helicopter flying at 500-feet above ground level. Once collected, the data was processed and classified, and a spatially accurate point cloud of the network was produced. Ground truthing QA/QC was performed to ensure the spatial accuracy was within compliance. The dataset allowed SDG&E to obtain an accurate location and elevation of the entire distribution and transmission system network including all assets, informing prioritization of which line elements needed replacing first depending on the age, location and material type in order to mitigate fire risk
GIS Surveyors Inc.
Restoring the Klamath River, CA: The use topobathymetric lidar and integrated sonar to provide data for designing and monitoring river recovery.
10:45 AM - 11:00 AM
With the recent decision to remove four dams along 300 miles of California’s Klamath River, understanding the current topography of the river is of utmost importance to federal, state, tribal, and environmental stakeholders in the watershed. In 2018, for the most significant dam removal undertaking in the history of the U.S., Quantum Spatial, in collaboration with several stakeholders and partners, used airborne topobathymetric lidar, multi-beam sonar, and high resolution multispectral imagery to comprehensively map the bathymetry of the Klamath River and soon-to-be-removed dams, providing critical baseline data on channel morphology and floodplain condition, and setting the stage for follow-on topographic monitoring as the river recovers. This presentation will provide an overview of the technical and methodological approach to the project and will include the innovative solutions employed to address the challenges presented by the unique geography and complexity of the Klamath River. The project required collaboration between multiple interests including USGS, NOAA, USACOE, Klamath River Renewal Corporation and several private firms. The lessons learned from the Klamath River project provide valuable insights as the application of shallow-water topobathymetric lidar continues to expand to inland waters.
Quantum Spatial, Inc.
Harnessing LiDAR for the Evolving World of Surveying through Partnerships
11:00 AM - 11:15 AM
WithersRavenel, an NC-based Engineering and Surveying company, and PrecisionHawk, the leading provider of commercial drone solutions, joined forces in a partnership to provide top-tier solutions to their clients. With first-hand knowledge of the ever-evolving world of surveying best practices, WithersRavenel and PrecisionHawk spent two years exploring the needs of surveyors in order to create a solution that paired LiDAR capability with an in-depth flight planner for simultaneous UAS LiDAR and photogrammetry missions. Now, WithersRavenel is actively flying a UAS LiDAR/Photogrammetry solution for topography and orthophotography applications to support survey and mapping services such as planimetric surveys and 3D feature extraction. UAS LiDAR flight missions completed to survey accuracies range from 5 acres to 900+ so far with operational tweaks continuing to evolve. Join this session to learn from their experiences throughout this process. You will leave this session with: ? An understanding of how WithersRavenel and PrecisionHawk expanded upon their current partnership to create a LiDAR and photogrammetry-based solution specific to surveyors. ? A use case-turned-template for future iterations of surveying LiDAR and photogrammetry solutions. ? An in-depth look at the specific steps WithersRavenel and PrecisionHawk took to ensure that their solution met the strict standards of surveyors in North Carolina, and across the US. ? A comprehensive look at the steps these companies took to build their partnership and provide a unique and relevant solution for their customers. Join WithersRavenel and PrecisionHawk for a presentation and open discussion highlighting land surveying legality/principles, best practices, and quality control procedures for UAS LiDAR and photogrammetry.
Hybrid Data Acquisition on a Country-Wide Project
11:15 AM - 11:30 AM
With a significant history in large-scale data acquisition, CycloMedia has recently taken on a country-wide project in The Netherlands employing hybrid sensing technology. With several systems being flown in parallel, the challenges and opportunities of hybrid airborne data acquisition and ground processing can be easily seen. In this presentation, we will provide an overview of the recent country-wide project using hybrid LiDAR and oblique image acquisition with Leica CityMapper. This unusual project spreads beyond a typical small area, resulting in large amounts of data from which much useful information can be extracted. Insights can be given on both the quality of LiDAR and image data as well as suggestions on best practices for the management of both airborne and ground operations (planning and processing) of large projects using hybrid sensor technology.
CycloMedia Technology B.V.
Q&A and panel discussions with session presenters
11:30 AM - 12:00 PM
There will be a 15 minute Q&A /panel discussion with the presenters of the Airborne Case Studies session.