Craig Glennie
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View article: Automated depth correction of bathymetric LiDAR point clouds using PointCNN semantic segmentation
Automated depth correction of bathymetric LiDAR point clouds using PointCNN semantic segmentation Open
The study explores deep learning to perform direct semantic segmentation of bathymetric lidar points to improve bathymetry mapping. Focusing on river bathymetry, the goal is to accurately and simultaneously classify points on the benthic l…
View article: Asynchronous Lidar: Proof-of-concept simulation and demonstration tests
Asynchronous Lidar: Proof-of-concept simulation and demonstration tests Open
This study proposes an asynchronous airborne lidar design in which the laser transmitter and detectors/receivers are disconnected and carried on separate platforms. This design is more advantageous than conventional synchronous lidar syste…
View article: Improving <i>Manning's n</i> in Flood Models Using 3D Point Clouds, Flume Experiments, and Deep Learning
Improving <i>Manning's n</i> in Flood Models Using 3D Point Clouds, Flume Experiments, and Deep Learning Open
Friction is one of the cruxes of hydrodynamic modeling; flood conditions are highly sensitive to the Friction Factors (FFs) used to calculate momentum losses. However, empirical FFs are challenging to derive, causing flood models to rely o…
View article: Deep Neural Networks with 3D Point Clouds for Empirical Friction Measurements in Hydrodynamic Flood Models
Deep Neural Networks with 3D Point Clouds for Empirical Friction Measurements in Hydrodynamic Flood Models Open
Friction is one of the cruxes of hydrodynamic modeling; flood conditions are highly sensitive to the Friction Factors (FFs) used to calculate momentum losses. However, empirical FFs are challenging to measure because they require laborator…
View article: Enhancing UAS-based Earth Science Through Coordinated Facility Support
Enhancing UAS-based Earth Science Through Coordinated Facility Support Open
Uncrewed Aircraft Systems (UAS) represent an evolving and important set of tools for earth science and engineering. While low-cost uncrewed aircraft systems (UAS) can be acquired and operated by individual researchers for simple surveying …
View article: Monitoring Volcanic Co2 Flux by the Remote Sensing of Vegetation on Mt. Etna, Italy
Monitoring Volcanic Co2 Flux by the Remote Sensing of Vegetation on Mt. Etna, Italy Open
View article: ICESat-2 noise filtering using a point cloud neural network
ICESat-2 noise filtering using a point cloud neural network Open
The ATLAS sensor onboard the ICESat-2 satellite is a photon-counting lidar (PCL) with a primary mission to map Earth's ice sheets. A secondary goal of the mission is to provide vegetation and terrain elevations, which are essential for cal…
View article: Deep Learning Hydrodynamic Forecasting for Flooded Region Assessment in Near-Real-Time (DL Hydro-FRAN)
Deep Learning Hydrodynamic Forecasting for Flooded Region Assessment in Near-Real-Time (DL Hydro-FRAN) Open
Hydrodynamic flood modeling improves hydrologic and hydraulic prediction of storm events. However, the computationally intensive numerical solutions required for high-resolution hydrodynamics have historically prevented their implementatio…
View article: Classification of Terrestrial Lidar Data Directly From Digitized Echo Waveforms
Classification of Terrestrial Lidar Data Directly From Digitized Echo Waveforms Open
Information derived from full-waveform (FW) light detection and ranging (lidar) data has already been shown to be relevant for point cloud analysis tasks. Relevant waveform attributes to populate the corresponding point’s feature vector ar…
View article: National Center for Airborne Laser Mapping (NCALM) LiDAR and DEM data from two NGEE Arctic Sites, Seward Peninsula, Alaska, Winter 2022
National Center for Airborne Laser Mapping (NCALM) LiDAR and DEM data from two NGEE Arctic Sites, Seward Peninsula, Alaska, Winter 2022 Open
From April 3 through April 6 of 2022, airborne remote sensing data was collected by the National Center for Airborne Laser Mapping (NCALM) in collaboration with NGEE Arctic scientists. Snow-on data was collected around two NGEE Arctic stud…
View article: Estimation of lidar-based gridded DEM uncertainty with varying terrain roughness and point density
Estimation of lidar-based gridded DEM uncertainty with varying terrain roughness and point density Open
Light detection and ranging (lidar) scanning systems can be used to provide a point cloud with high quality and point density. Gridded digital elevation models (DEMs) interpolated from laser scanning point clouds are widely used due to the…
View article: Sustainability of Network Infrastructure in a Geospatial Resilience Context
Sustainability of Network Infrastructure in a Geospatial Resilience Context Open
Increased societal reliance on critical infrastructures, such as the internet, has fueled resilience concerns. However, important geospatial differences complicate large-scale studies of critical infrastructure. This research develops a ne…
View article: Stream Boundary Detection of a Hyper-Arid, Polar Region Using a U-Net Architecture: Taylor Valley, Antarctica
Stream Boundary Detection of a Hyper-Arid, Polar Region Using a U-Net Architecture: Taylor Valley, Antarctica Open
Convolutional neural networks (CNNs) are becoming an increasingly popular approach for classification mapping of large complex regions where manual data collection is too time consuming. Stream boundaries in hyper-arid polar regions such a…
View article: Validation of ICESat-2 ATL08 Terrain and Canopy Height Retrievals in Tropical Mesoamerican Forests
Validation of ICESat-2 ATL08 Terrain and Canopy Height Retrievals in Tropical Mesoamerican Forests Open
In this article, we validate Ice, Cloud, and Land Elevation Satellite2 (ICESat-2)-derived interpolated terrain elevations (h_te_interp), top of canopy elevations (h_canopy_abs), and estimated canopy heights (h_canopy) in dense tropical for…
View article: Terrestrial Lidar Data Classification Based on Raw Waveform Samples Versus Online Waveform Attributes
Terrestrial Lidar Data Classification Based on Raw Waveform Samples Versus Online Waveform Attributes Open
In this study, the potential of raw samples of digitized echo waveforms collected by full-waveform (FW) terrestrial laser scanning (TLS) for point cloud classification is investigated. Two different TLS systems are employed, both equipped …
View article: Monitoring aseismic fault creep using persistent urban geodetic markers generated from mobile laser scanning
Monitoring aseismic fault creep using persistent urban geodetic markers generated from mobile laser scanning Open
View article: Robust Earthquake Early Warning at a Fraction of the Cost: ASTUTI Costa Rica
Robust Earthquake Early Warning at a Fraction of the Cost: ASTUTI Costa Rica Open
We show that a fixed smartphone network can provide robust Earthquake Early Warning for at least two orders of magnitude less cost than scientific‐grade networks. Our software and cloud‐based data architecture that we have constructed for …
View article: Radiometric Calibration of an Inexpensive LED-Based Lidar Sensor
Radiometric Calibration of an Inexpensive LED-Based Lidar Sensor Open
Radiometric calibration of laser-based, topographic lidar sensors that measure range via time of flight or phase difference is well established. However, inexpensive, short-range lidar sensors that utilize non-traditional ranging technique…
View article: ACCURACY ASSESSMENT AND CALIBRATION OF LOW-COST AUTONOMOUS LIDAR SENSORS
ACCURACY ASSESSMENT AND CALIBRATION OF LOW-COST AUTONOMOUS LIDAR SENSORS Open
A number of low-cost, small form factor, high resolution lidar sensors have recently been commercialized in an effort to fill the growing needs for lidar sensors on autonomous vehicles. These lidar sensors often report performance as range…
View article: Mechanics of near-field deformation during co- and post-seismic shallow fault slip
Mechanics of near-field deformation during co- and post-seismic shallow fault slip Open
Poor knowledge of how faults slip and distribute deformation in the shallow crust hinders efforts to mitigate hazards where faults increasingly intersect with the expanding global population at Earth’s surface. Here we analyze two study si…
View article: Evaluation of SPL100 Single Photon Lidar Data
Evaluation of SPL100 Single Photon Lidar Data Open
Geiger-mode and single photon lidar sensors have recently emerged on the commercial market, advertising greater collection efficiency than the traditional linear mode lidar (LML) systems. Non-linear photon detection is a new technology for…
View article: New Approach for Low-Cost TLS Target Measurement
New Approach for Low-Cost TLS Target Measurement Open
The registration and calibration of data captured with terrestrial laser scanner instruments can be effectively achieved using signalized targets comprising components of both high and low reflectivity, so-called contrast targets. For proj…
View article: Explanation for the seam line discontinuity in terrestrial laser scanner point clouds
Explanation for the seam line discontinuity in terrestrial laser scanner point clouds Open
View article: Extent of Low‐Angle Normal Slip in the 2010 El Mayor‐Cucapah (Mexico) Earthquake From Differential Lidar
Extent of Low‐Angle Normal Slip in the 2010 El Mayor‐Cucapah (Mexico) Earthquake From Differential Lidar Open
We investigate the 4 April 2010 M w 7.2 El Mayor‐Cucapah (Mexico) earthquake using three‐dimensional surface deformation computed from preevent and postevent airborne lidar topography. By profiling the E‐W, N‐S, and vertical displacement f…
View article: Weak Echo Detection from Single Photon Lidar Data Using a Rigorous Adaptive Ellipsoid Searching Algorithm
Weak Echo Detection from Single Photon Lidar Data Using a Rigorous Adaptive Ellipsoid Searching Algorithm Open
Single photon lidar (SPL) systems have great potential to be an effective tool for mapping due to their high data collection efficiency. However, the large number of false returns in SPL point clouds represents a huge challenge for the ext…
View article: Dynamic Management of Water Storage for Flood Control in a Wetland System: A Case Study in Texas
Dynamic Management of Water Storage for Flood Control in a Wetland System: A Case Study in Texas Open
In this study, we assess the costs and benefits of dynamic management of water storage to improve flood control in a system of wetlands. This management involves releasing water from wetlands ahead of (e.g., a few hours or days before) a r…
View article: Buried shallow fault slip from the South Napa earthquake revealed by near-field geodesy
Buried shallow fault slip from the South Napa earthquake revealed by near-field geodesy Open
Mobile laser scans of vine rows deformed by the South Napa earthquake record shallow fault slip that does not breach the surface.
View article: Terrestrial Hyperspectral Image Shadow Restoration through Lidar Fusion
Terrestrial Hyperspectral Image Shadow Restoration through Lidar Fusion Open
Acquisition of hyperspectral imagery (HSI) from cameras mounted on terrestrial platforms is a relatively recent development that enables spectral analysis of dominantly vertical structures. Although solar shadowing is prevalent in terrestr…
View article: Analyzing Glacier Surface Motion Using LiDAR Data
Analyzing Glacier Surface Motion Using LiDAR Data Open
Understanding glacier motion is key to understanding how glaciers are growing, shrinking, and responding to changing environmental conditions. In situ observations are often difficult to collect and offer an analysis of glacier surface mot…
View article: Sculpted by water, elevated by earthquakes—The coastal landscape of Glacier Bay National Park, Alaska
Sculpted by water, elevated by earthquakes—The coastal landscape of Glacier Bay National Park, Alaska Open
First posted May 22, 2017 For additional information, contact: Alaska Science CenterAlaska Mineral ResourcesU.S. Geological Survey4210 University Dr.Anchorage, AK 99508 Within Glacier Bay National Park in southeastern Alaska, the Fairweath…