@proceedings {6348, title = {Operational TPU Software for Topobathymetric Lidar}, year = {2018}, month = {June 26-28}, address = {Providence, RI}, abstract = {

While topobathymetric lidar has been established as an effective technology for updating shoreline on nautical charts, there is great interest in the ability to simultaneously use the data to update charted depths (or \“soundings\”) in areas in areas too shallow for boats to operate safely or efficiently. However, operational use of topobathymetric lidar data in nautical charting programs requires total propagated uncertainty (TPU) models and tools comparable to those that exist for hydrographic surveys conducted with multibeam echosounders. The TPU requirement is based on the International Hydrographic Organization (IHO) \“Standards for Hydrographic Surveys\” (S-44), as well as surface generation algorithms that rely on the availability of per-point uncertainty estimates. A comprehensive TPU model has been developed for the Riegl VQ-880-G operated by NOAA\’s National Geodetic Survey (NGS). The model combines analytical uncertainty propagation for the subaerial (above water) portion and Monte Carlo simulation models for the subaqueous portion (water surface to seafloor). Because a key goal of the project is to support routine, operational use of the TPU software, computation time and ease-of-use have been important considerations in the development. The TPU model has been implemented in Python software, which is currently being tested on multiple data sets by NGS. Next steps in the project will include extending the methods to other bathymetric lidar systems.\ 

}, author = {Christopher E Parrish and Eren, Firat and J. Jung and Forfinski, Nick and Brian R Calder and White, Stephen A and Imahori, Gretchen and Kum, Jamie and Aslaksen, Michael} } @article {5747, title = {Using JALBTCX - USACE Airborne Topographic-Bathymetric Lidar to Update Coastal Bathymetry on NOAA Nautical Charts}, year = {2016}, month = {May 16 - 19}, address = {Halifax, Nova Scotia, Canada}, abstract = {
The Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX) partnership is comprised of the U.S. Army Corps of Engineers (USACE), the U.S. Naval Meteorology and Oceanography Command, the National Oceanic and Atmospheric Administration (NOAA), and the U.S. Geological Survey (USGS). Both the
USACE and NOAA have requirements to collect topo-bathy lidar of the U.S. coastline, but for different intended applications. The USACE resurvey the contiguous U.S. coast every\ five to seven\ years through their National Coastal Mapping Program: an excellent resource to assist NOAA in meeting their nautical charting requirements. This paper summarizes how NOAA and USACE are investigating the topo-bathy lidar datasets and plans to ingest them into the NOAA charting pipeline to routinely update nautical charts on a national scale. Ultimately, reducing the deficit of recent and reliable near-shore coastal bathymetry for the U.S. mariner.
}, keywords = {airborne topographic-bathymetry lidar, coastal bathymetry, jalbtcx, noaa nautical charts, usacce}, author = {Wozencraft, J. and Aslaksen, Michael and Imahori, Gretchen and S. Pe{\textquoteright}eri and Witmer, Joshua} } @article {5408, title = {New Topographic-Bathymetric Lidar Technology for Post-Sandy Mapping}, year = {2014}, month = {14-17 April}, address = {St. John{\textquoteright}s, Newfoundland, Canada}, abstract = {

Hurricane Sandy, one of the costliest storms in U.S. history, made landfall near Brigantine, New Jersey, on October 29, 2012. With storm damage extending over a significant portion of the U.S. East Coast and on both sides of the land-water interface, innovative remote sensing tools and techniques are needed to effectively assess the impacts. Along with private sector and government partners, NOAA\’s National Geodetic Survey (NGS) has been investigating new topographic-bathymetric (\“topo-bathy\”) lidar technology, which offers enhanced capabilities for high-resolution, seamless data acquisition across the backshore, intertidal and shallow nearshore zones. In June and September, 2013, NOAA acquired data with a new Riegl VQ-820-G topo-bathy lidar system in Barnegat Bay, a shallow, lagoonal estuary located along the New Jersey coast, and other areas that experienced extensive damage from Sandy. Lessons learned from these projects were then used in creating a Scope of Work for contracted lidar acquisition in support of the Disaster Relief Appropriations Act of 2013. In this paper, we provide a technical overview of new topo-bathy lidar systems and present recent results from the post-Sandy mapping efforts.

}, author = {Aslaksen, Michael and Christopher E Parrish} } @article {5138, title = {A procedure for developing an acceptance test for airborne bathymetric lidar data application to NOAA charts in shallow waters}, year = {2013}, month = {June 2013}, pages = {53}, institution = {National Oceanic and Atmospheric Administration (NOAA), National Ocean Survey (NOS)}, chapter = {NOAA Technical Memorandum NOS CS 32}, address = {Silver Spring, MD}, abstract = {

National Oceanic and Atmospheric Administration (NOAA) hydrographic data is typically acquired using sonar systems, with a small percent acquired via airborne lidar bathymetry for near-shore areas. This study investigated an integrated approach for meeting NOAA\’s hydrographic survey requirements for near-shore areas of NOAA charts, using the existing topographic-bathymetric lidar data from USACE\’s National Coastal Mapping Program (NCMP). Because these existing NCMP bathymetric lidar datasets were not collected to NOAA hydrographic surveying standards, it is unclear if, and under what circumstances, they might aid in meeting certain hydrographic surveying requirements. The NCMP\’s bathymetric lidar data are evaluated through a comparison to NOAA\’s Office of Coast Survey hydrographic data derived from acoustic surveys. As a result, it is possible to assess if NCMP\’s bathymetry can be used to fill in the data gap shoreward of the navigable area limit line (0 to 4 meters) and if there is potential for applying NCMP\’s bathymetry lidar data to near-shore areas deeper than 10 meters. Based on the study results, recommendations will be provided to NOAA for the site conditions where this data will provide the most benefit. Additionally, this analysis may allow the development of future operating procedures and workflows using other topographic-bathymetric lidar datasets to help update near-shore areas of the NOAA charts.

}, keywords = {airborne bathymetric lidar, hydrography, Integrated Ocean and Coastal Mapping, near-shore bathymetry, topographic-bathymetric lidar}, author = {Imahori, Gretchen and Ferguson, Jeff and Wozumi, Toshi and Scharff, Dave and S. Pe{\textquoteright}eri and Christopher E Parrish and White, Stephen A and Jeong, Inseong and Sellars, Jon and Aslaksen, Michael} } @article {5065, title = {Topographic-Bathymetric LIDAR Evaluation for Integrated Ocean and Coastal Mapping}, year = {2012}, month = {4-5 December}, address = {Salzburg, Austria}, abstract = {

An emerging class of lidar system bridges the gap between conventional topographic and bathymetric lidar, using narrow-divergence, 532 nm laser beams, low pulse energy, small fields of view (FOVs), and very high sampling rates to acquire seamless, high-resolution data on both sides of the land-water interface.\  These systems offer the potential to simultaneously serve a variety of nautical charting, coastal science, and coastal zone management data needs, a key concept of the U.S. National Oceanic and Atmospheric Administration (NOAA) Integrated Ocean and Coastal Mapping (IOCM) initiative.\  By providing seamless, high-resolution data across the backshore, intertidal, and nearshore subtidal zones to depths of ~5-20 m (depending on water clarity and other variables), these systems are uniquely suited for mapping tide-datum based shoreline, as well studies of coastal processes, inundation modeling, coastal habitats, and ecosystem-based management.\  Here we present the results of an evaluation project conducted with a new, commercial topo-bathy system, the Riegl VQ-820-G.\  In the first test of the system in U.S. coastal waters, data were acquired for five small sites on the Florida Atlantic coast and in the Florida Keys.\  Reference data sets, including shallow GPS transects, acoustic data, and other lidar data, were used to evaluate the lidar data with respect to extinction depth, density of seafloor points, and vertical uncertainty of seafloor elevations obtained with the system.

}, url = {http://www.lidarmap.org/ELMF/}, author = {Christopher E Parrish and White, Stephen A and Aslaksen, Michael and Pfennigbauer, M and Rieger, P} } @proceedings {, title = {New Developments in Lidar Shoreline Mapping and Full-Waveform Lidar at NOAA}, year = {2010}, month = {Nov 30 - Dec 1}, chapter = {2010}, address = {The Hague, South Holland, The Netherlands}, keywords = {Other}, author = {Christopher E Parrish and White, Stephen A and Aslaksen, Michael} }