Michael J. Olsen

Michael J. Olsen
Oregon State University | OSU · Department of Civil and Construction Engineering

PhD Structural Engineering (UCSD)

About

149
Publications
64,664
Reads
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3,014
Citations
Citations since 2017
85 Research Items
2462 Citations
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Introduction
Michael Olsen is anProfessor of Geomatics in the School of Civil and Construction Engineering at Oregon State University. He is currently serving as the Editor-in-Chief for the ASCE Journal of Surveying Engineering. He has BS and MS degrees in Civil Engineering from the University of Utah and a Ph.D. from the University of California, San Diego. He has also worked as an Engineer in Training for West Valley City. His current areas of research include terrestrial laser scanning, remote
Additional affiliations
September 2009 - present
Oregon State University
Position
  • Professor (Associate)

Publications

Publications (149)
Article
Important infrastructure such as highways or railways traverse unstable terrain in many mountainous and scenic parts of the world. Rockfalls and landslides result in frequent maintenance needs, system unreliability due to frequent closures and restrictions, and safety hazards. Seismic activity significantly amplifies these negative economic and com...
Article
Full-text available
Distributions of landslide size are hypothesized to reflect hillslope strength, and consequently weathering patterns. However, the association of weathering and critical zone architecture with mechanical strength properties of parent rock and soil are poorly-constrained. Here we use three-dimensional stability to analyze 7330 landslides in western...
Article
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Displacement monitoring is a critical step to understand, manage, and mitigate potential landside hazard and risk. Remote sensing technology is increasingly used in landslide monitoring. While significant advances in data collection and processing have occurred, much of the analysis of remotely-sensed data applied to landslides is still relatively...
Article
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Debris flows evolve in both time and space in complex ways, commonly starting as coherent failures but then quickly developing structures such as roll waves and surges. These processes are readily observed but difficult to study or quantify because of the speed at which they evolve. Many methods for studying debris flows consist of point measuremen...
Article
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The effects of strong ground shaking on hillslope stability can persist for many years after a large earthquake, leading to an increase in the rates of post earthquake land sliding. The factors that control the rate of post‐earthquake land sliding are poorly constrained, hindering our ability to reliably forecast how landscapes and landslide hazard...
Article
Erosive processes have long been considered an important control on landslide activity in coastal environments. Despite its importance and numerous coastal failures in recent years, there has been limited quantitative characterization of the feedbacks between coastal erosion and the commensurate advance of active landslides. Quantitatively understa...
Article
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Point clouds acquired by light detection and ranging (lidar) and photogrammetry technology (e.g., structure from motion/multi-view stereo-SfM/MVS) are widely used for various applications such topographic mapping due to their high resolution and accuracy. To generate a digital elevation model (DEM) or extract other features in the data, the ground...
Article
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Global geodetic techniques currently can provide the user with worldwide millimeter accuracy. Preservation of this degree of accuracy in derived products is far from straightforward and may leave vast room for trouble in the different steps involved in the collection, storing, processing, analysis, and delivering of geospatial information. This pap...
Article
Mobile light detection and ranging (LiDAR) has been widely applied to support a variety of tasks because it captures detailed three-dimensional data of a scene with high accuracy with reduced costs and time compared with many other techniques. Given the large volume of data within a mobile LiDAR point cloud, automation of processing and analysis is...
Article
The objective of this study is to examine and compare the vulnerabilities of highway bridges to the combined effects of earthquake shaking, ground failure, and tsunami loading. Earthquake-induced ground shaking, ground failure (e.g., landslides and liquefaction), and tsunami inundation fragility functions are combined with regional hazard data to e...
Article
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Photogrammetry using structure from motion (SfM) and multiview stereopsis (MVS) techniques can recover three-dimensional (3D) structure from a set of overlapping, unoriented, and uncalibrated images captured by nonmetric digital cameras. It is possible to generate accurate reconstructions of sparse points using mathematically robust bundle adjustme...
Article
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Extensive gaps in terrestrial laser scanning (TLS) point cloud data can primarily be classified into two categories: occlusions and dropouts. These gaps adversely affect derived products such as 3D surface models and digital elevation models (DEMs), requiring interpolation to produce a spatially continuous surface for many types of analyses. Ultima...
Article
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In 2016, the National Science Foundation (NSF) funded a multi-institution interdisciplinary team to develop and operate the Natural Hazards Reconnaissance Facility (known as the “RAPID”) as part of the Natural Hazards Engineering Research Infrastructure (NHERI) program. During the following 2 years, the RAPID facility developed its instrumentation...
Article
Full-text available
Natural hazards and disaster reconnaissance investigations have provided many lessons for the research and practice communities and have greatly improved our scientific understanding of extreme events. Yet, many challenges remain for these communities, including improving our ability to model hazards, make decisions in the face of uncertainty, enha...
Conference Paper
Full-text available
Following an earthquake, there is a need to rapidly collect perishable data to evaluate the seismic performance of structures and aid in decision making regarding structural integrity and safety. Traditional reconnaissance methods, such as visual inspection and photographing of damage by individual researchers, can be time consuming and dangerous,...
Article
Full-text available
Landslides occur in a variety of forms that are a function of climactic setting, tectonic setting, geomorphic and geologic setting, and the shear strength of soil and rock. While major advances in characterizing the spatial influence of these settings on landslide activity have occurred in recent years, there has been limited progress on understand...
Article
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Noncontact measurements of spatially varied ground surface deformation during landslide motion can provide important constraints on landslide mechanics. Here, we present and test a new method for extracting measurements of rapid landslide surface displacement and velocity (accelerations of approximately 1 m/s²) using sequences of stereo images obta...
Article
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We use a mapped landslide inventory coupled with a 2‐m resolution vertical difference model covering an area of 6,875 km² to accurately constrain landslide volume‐area relationships. We use the difference model to calculate the source volumes for landslides triggered by the MW 7.8 Kaikōura, New Zealand, earthquake of 14 November 2016. Of the 29,519...
Article
Deep-seated landslides cause significant damage to the built environment. Characterizing the shear surface and volume of these features is often limited to intensive site-specific monitoring, or at a larger scale, generalized empirical relationships developed from change analysis. However, there is limited means of generalizing regional-scale ruptu...
Article
This paper presents an analysis of the Hooskanaden Landslide, an earthflow, which experienced a dramatic surge event beginning on February 24, 2019, closing US Highway 101 near mile point 343.5 for nearly 2 weeks. This ~ 1 km long surge event resulted in horizontal displacements of up to 45 m and uplift of 6 m at the toe located on a gravel beach a...
Article
For periodic monitoring of power utilities, there has been keen interest by utility companies to extract the powerlines from laser scanning data. However, challenges arise when utilizing large point clouds as well as avoiding false positives or other errors in the extraction due to noise from objects in close proximity to the powerlines. In this st...
Article
This paper presents a linear applied element method (AEM) modeling approach for investigating the effects of the Mw 7.8 2015 Gorkha Nepal earthquake on a historical Pagoda temple. The impact of the earthquake is also investigated using linear FEM models and the results from both modeling approaches are compared. The numerical models are developed a...
Article
Full-text available
Geotechnical borehole information is often used for liquefaction hazard mapping but can be highly variable in terms of quantity and quality. In addition, geotechnical borehole logs are often provided as images in reports rather than delivered in a structured, queryable database, which makes the logs and supplementary information difficult to organi...
Article
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Uncrewed aircraft systems (UASs) with integrated light detection and ranging (lidar) technology are becoming an increasingly popular and efficient remote sensing method for mapping. Due to its quick deployment and comparatively inexpensive cost, uncrewed laser scanning (ULS) can be a desirable solution to conduct topographic surveys for areas sized...
Technical Report
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This research investigated effective uses of geospatial technology for a wide variety of highway construction and maintenance applications; identifies a number of tools and their related accuracies; offered recommendations for tool selection, workflows, and strategies for conducting benefit-cost analysis (BCA); and analyzed future directions of the...
Article
Unmanned Aerial Systems (UASs), commonly known as drones, are a rapidly emerging technology with many applications across various commercial, government, and recreational users. Many of these applications have the potential to interact with roadway infrastructure, resulting in potentially risky conflicts between UAS operations and drivers on the ro...
Article
Seismically-induced permanent displacements of slopes are commonly evaluated using the Newmark sliding block approach. The conventional Newmark approach, while convenient in application, is often applied to a singular potential failure mechanism, omits consideration of the spatial distribution of potential failure mechanisms , neglects complex yet...
Article
Full-text available
Pavement markings are produced with retroreflective materials to enhance visibility for motorists, particularly at night. Retroreflectivity evaluation throughout an extensive highway network for maintenance and asset management purposes is a critical, yet challenging task for transportation agencies because visual evaluation can often be subjective...
Article
Full-text available
Recent technological advances have made unmanned aerial systems (UASs)-commonly referred to as drones-smaller, more affordable, and more available for civilian operations. As UASs become more ubiquitous in applications for industry, agriculture, and transportation, they will inevitably interact with existing roadway infrastructure. Current commerci...
Article
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Pavement markings serve as important traffic control devices, delineating traffic lanes and conveying regulations, guidance or warnings to roadway users. To ensure that pavement markings are clearly visible, especially at night, transportation agencies periodically assess the retroreflectivity of various categories of markings through manual approa...
Article
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Mobile laser scanning (MLS, or mobile lidar) is a 3-D data acquisition technique that has been widely used in a variety of applications in recent years due to its high accuracy and efficiency. However, given the large data volume and complexity of the point clouds, processing MLS data can be still challenging with respect to effectiveness, efficien...
Article
Full-text available
Mobile Laser Scanning (MLS) is a versatile remote sensing technology based on Light Detection and Ranging (lidar) technology that has been utilized for a wide range of applications. Several previous reviews focused on applications or characteristics of these systems exist in the literature, however, reviews of the many innovative data processing st...
Article
Full-text available
Landslide inventory maps are critical to understand the factors governing landslide occurrence and estimate hazards or sediment delivery to channels. Numerous semi-automated approaches for landslide inventory mapping have been proposed to improve the efficiency and objectivity of the process, but these methods have not been widely adopted by practi...
Article
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Many landslides cause destruction through progressive, gradual movements that stem from precipitation and toe erosion caused by marine or riverine processes. The magnitude and timing of seasonal landslide movement may be influenced by changing slide mass geometry and pore pressure response. The rate of landslide advance and potential for sustained...
Conference Paper
The number of work zones in place at any given time on the nation's roadways continues to rise. These work zones pose safety concerns for both passing motorists and roadway construction laborers. To guide the public through a work zone safely, commonly used traffic control measures include the placement of temporary channelizing devices (e.g., drum...
Presentation
Full-text available
The number of work zones in place at any given time on the nation’s roadways continues to rise. These work zones pose safety concerns for both passing motorists and roadway construction laborers. To guide the public through a work zone safely, commonly used traffic control measures include the placement of temporary channelizing devices (e.g., drum...
Article
Surveys of roadways with Mobile Laser Scanning (MLS) are now being conducted on a regular basis by many transportation agencies to provide detailed geometric information to support a wide range of applications, including asset management. Most MLS systems provide intensity (return signal strength) data as a point attribute in georeferenced point cl...
Presentation
Laser scanning, also known as lidar, is being used by a growing number of scientific studies and engineering applications. The spatially-varying geometric uncertainty of the resulting three-dimensional (3D) point cloud can have a substantial impact on the validity of derived products (e.g., digital surfaces and 3D models) and the quality of observa...
Article
Full-text available
Traditionally, application of the conventional logarithmic spiral in limit equilibrium (LE) analyses has been limited to homogenous materials. Herein, a modification of the conventional logarithmic spiral LE approach is proposed to account for transitions in soil conditions and provide insight into the internal statics associated with this approach...
Article
A modified logarithmic-spiral limit equilibrium procedure is proposed to rigorously determine the critical failure mechanism and stability of slopes comprised of soils where both friction angle and cohesion demonstrate anisotropic shear strength. The influence of both cohesion and friction anisotropy has not been explicitly considered using the log...
Article
Although laser-scanning total propagated uncertainty (TPU) is an active topic in the research community, there is a current dearth of commercial or open-source software for generating point clouds with per-point, three-dimensional (3D) coordinate uncertainties from terrestrial, mobile, and airborne laser scanning. Consequentially, there is a corres...
Article
The Surveying and Geomatics Educators Society (SaGES) held their 26th Biannual Conference at Oregon State University (OSU) in Corvallis, OR, from July 30 to August 3, 2017. This innovative conference provides an opportunity to discuss and find solutions to the many challenges and opportunities facing geomatics education. It also enables educators t...
Article
Development of a digital elevation model (DEM) with terrestrial laser scanning (TLS) point cloud data of inadequate resolution and/or completeness will result in a poor-quality DEM with significant gaps. In many cases, this fact can be obscured from the user because spatial interpolation (e.g., generating a surface mesh or kriging) is often perform...
Article
Full-text available
Real-time networks (RTNs) have become popular for global navigation satellite system (GNSS) surveys because highly accurate positions can be derived in seconds to a few minutes compared with the many minutes and hours required with postprocessed static sessions. To evaluate the accuracy of these shorter-duration RTN GNSS observations and their pote...
Article
Earthquake-induced liquefaction may result in the lateral spread displacement of soil down gently sloping ground or towards a free-face, causing severe and costly damage to various facilities, bridges, buildings and other critical infrastructure. Despite the availability of analytical methods, most engineers currently use empirical or semi-empirica...
Article
en This study examines three sites in Alaska with unstable rock slopes that were surveyed using both terrestrial laser scanning (TLS) and structure‐from‐motion (SfM) techniques. The datasets were acquired simultaneously and linked to a rigorous survey control network. An accuracy evaluation of the SfM‐derived surface models was performed using the...
Article
The 2016 Mw 7.8 Kaikōura earthquake caused widespread liquefaction and significant ground movements in thick end-dumped gravelly fills and hydraulically placed dredged sandy fills at CentrePort, Wellington. Settlement of 200–300 mm occurred throughout the reclamation, and settlement as large as 400–600 mm occurred near the reclamation edges where l...
Technical Report
Full-text available
Drones are an emerging technology with various potential commercial and recreational uses. Based on the current literature and existing regulations related to drone operations, there are gaps in knowledge related to the potential safety concerns of drone operations near roadway infrastructures. A randomized, partially counterbalanced factorial expe...
Article
Point cloud segmentation groups points with similar attributes with respect to geometric, colormetric, radiometric, and/or other information to support Terrestrial Laser Scanning (TLS) data processing such as feature extraction, classification, modeling, analysis, and so forth. In this paper we propose a segmentation method consisting of two main s...
Article
Sight distance analyses require careful and detailed field measurements to facilitate proper engineering decision making regarding the removal of obstructions, establishment of regulatory and advisory speed limits, and the location of new access points, among numerous other purposes. However, conventional field measurements for these analyses prese...
Article
Following the April 25, 2015 M7.8 Gorkha Nepal earthquake and subsequent aftershocks, field surveys were conducted on medium-to-high rise reinforced concrete (RC) frame buildings with masonry infill located in Kathmandu. Rapid visual assessment, ambient vibration testing, and ground based lidar (GBL) show that these buildings exhibited damage level...
Article
Full-text available
This paper documents and analyzes the seismic behavior of unreinforced masonry (URM) buildings that were damaged by the 2015 Gorkha earthquake in Nepal, and reports on the performance of palaces, giving an overview on the failures suffered by significant examples of these monumental buildings. Field reconnaissance was completed through both rapid,...
Article
Lateral spreading is a prevalent geotechnical problem associated with earthquake-induced liquefaction, often occurring at gentle slopes of loose, saturated sand near bodies of water and causing significant damage to buried utilities. This study presents a deterministic approach to analyze lateral spreading behavior using a modified Newmark analysis...
Article
Full-text available
This paper presents a novel methodology to combine ambient vibration-based operation modal analysis with three-dimensional ground-based lidar data to study damage on the Nyatapola Temple, which is a Bhaktapur UNESCO World Heritage Site that was damaged during the 2015 Gorkha, Nepal, earthquake. The post-earthquake ambient vibration data, collected...
Data
The 2015 Nepal Earthquake (also known as the Gorkha earthquake), occurred on April 25, 2015, with Mw = 7.8 and a maximum Mercalli Intensity of IX (Violent). Its epicenter was near the village of Barpak, Gorkha district, and its hypocenter was at a shallow depth of approximately 15 km (9.3 mi). This earthquake and the many aftershocks that followed...
Article
Seismically-induced landslides can be detrimental to urban communities, often resulting in significant damage and repair costs, blockage of lifeline connection routes and utilities, environmental impacts, and potential for loss of life. Consistent, reliable hazard maps can assist agencies to efficiently allocate limited resources to prepare for the...
Article
Full-text available
Terrestrial Laser Scanning (TLS) utilizes light detection and ranging (lidar) to effectively and efficiently acquire point cloud data for a wide variety of applications. Segmentation is a common procedure of post-processing to group the point cloud into a number of clusters to simplify the data for the sequential modelling and analysis needed for m...
Conference Paper
Full-text available
Civil integrated management (CIM) modeling, which is an extension of BIM, entails the creation of a geometric 3D model of a feature that is combined with its attributes. CIM is often started by fitting simple geometric shapes to a 3D point cloud. Terrestrial LiDAR is a proven surveying technique for generating accurate point clouds for CIM models....