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Pre-Symposium Workshops

Date: Tuesday 8 December 2015
Venue: Civil Engineering (CE) Building

Instructions to the Workshop Participants: The workshop venue has been changed to Civil Engineering (CE) Building. Notes for the Workshops will only be available to the participants in the digital formats (such as PDF) during or after the workshops - you are recommended to bring your own laptop computers to the workshops, particularly for Workshop C.

Workshop A: UAS in Mapping Applications
Presenter: Prof Norbert Haala, University of Stuttgart, Germany
Time: 9:00am to 12:00pm
Room: Room G6, Ground Level, Civil Engineering Building
Summary: The flexible use of unmanned airborne systems is especially beneficial while aiming at data capture within areas of limited extent. This can include tasks like topographical mapping in the context of land management and consolidation, natural hazard mapping or high quality image based surface reconstruction for monitoring applications. The course will give an insight of the potential of unmanned aerial systems for geomatics applications and the theory behind it. Special focus will be laid on the processing of image data captured within different UAS projects. This will include hands on demonstrations of processing steps like Structure-from-Motion for image orientation as well as 3D point cloud and surface model generation by dense multi-stereo image-matching. Target audience are PhD and Master students involved in geomatics and photogrammetry, staff from national mapping agencies, public authorities and third parties who are planning to or actually working with an unmanned aerial system.

Workshop B: Indoor Mapping and Navigation: Sensors and Methods
Presenter: Prof Charles Toth, The Ohio State University, USA
Time: 9:00am to 12:00pm
Room: Room G8, Ground Level, Civil Engineering Building
Summary: This short course will provide a review of state-of-the-art imaging and navigation sensors and techniques suitable for indoor mapping and pedestrian navigation. Personal navigation (PN) is defined as navigation for military and emergency personnel, while pedestrian navigation refers to location/navigation/tracking of all other types of mobile users.
Strong technological developments have significantly reshaped the remote sensing and navigation practice in the past decade. Active and passive sensors have seen dramatic improvements in performance, including higher spatial and temporal resolution as well as better precision, resulting in a significantly improved observability of the object space. In parallel, the need for indoor mapping and PN has been steadily increased. The core technologies in navigation systems are the Global Positioning System (GPS) and inertial sensors (IMU), which provide seamless highly accurate navigation in open-sky environment, where GPS signals are available. To facilitate navigation indoors or in GPS-denied environments, additional navigation and imaging sensors are required, which, in turn, form the basis for mapping the environment around the navigated platform. An overview is provided of some of these technologies, such as, RF solutions, ultra-wideband (UWB) networks, as well as a basic introduction to 2D and 3D active and passive imaging sensors.
Following the technology overview, examples including implementation and performance assessment of a personal navigation and mapping systems, in various sensor configurations, will be presented. This example design will be of a system that uses GPS, inertial measurement unit (IMU), UWB, digital barometer, magnetometer compass, and human locomotion model as well as 2D/3D imaging sensors to provide position and attitude estimates to support navigation and indoor mapping.

Workshop C: Hands-on LiDAR Processing with LAStools
Presenter:Dr. Martin Isenburg, rapidlasso GmbH, Germany
Time: 9:00am to 12:00pm
Room: Room 101, Level 1, Civil Engineering Building
Summary: Dr. Isenburg will start with a short and intuitive introduction to LiDAR processing with examples of different projects such as the Canary Islands (Spain) where the vegetation-penetrating lasers uncovered elevation differences of up to 25 meters between the official government maps and reality, flood mapping in the Philippines, archaeological finds in Polish forests, and mapping biomass in Thailand, or other recent "laser adventures".
This is followed by a hands-on session during which attendees will perform the core steps of a LiDAR processing workflow on their own Windows laptops using the software and data provided. If you were to be given a folder full of raw LiDAR point cloud files and your goal was to create several products from this data then we will teach you all the steps you should go through in a super condesed and highly practical manner. We will touch upon parts of (1) LiDAR quality checking such as pulse density, coverage, and flightline alignment, (2) LiDAR preparation (compressing, tiling, denoising, classifying), (3) manual editing of important miss-classified features, (4) LiDAR derivative creation (DTM and DSM rasters, contours, CHM or nDSM rasters), and - if time permits - (5) some intuition about how full-waveform is different from discrete LiDAR and their exploration with PulseWaves.

Workshop D: Mobile Lidar Guidelines and E-learning Opportunities
Presenter: A/Prof Michael Olsen, Oregon State University, USA
Time: 2:00pm to 5:00pm
Room: Room G6, Ground Level, Civil Engineering Building
Summary: Guidelines for the use of mobile lidar in transportation applications were recently released by the Transportation Research Board. These guidelines address key phases of mobile lidar workflows including data acquisition, processing, formatting and management, storage requirements, quality assurance, and deliverables. The Guidelines are based on performance criteria such as data precision, local accuracy, network accuracy, and point density requirements as required by the intended applications. An interactive website, www.learnmobilelidar.com has also been developed to host a variety of training materials such as five e-learning modules have been created to help convey critical technical concepts related to mobile lidar in a easy to use, non-threatening atmosphere. This workshop will provide an overview of the content of the mobile guidelines as well as best practices for implementation of mobile lidar within a transportation organization. The workshop will also discuss educational tools that are available to disseminate this critically important and rapidly evolving information to a range of management and technical transportation personnel. The workshop is meant for management and technical staff at transportation organizations who will be utilizing mobile lidar data.

Workshop E: Photogrammetric & LiDAR Mapping Technologies: Promise & Challenges
Presenter: Prof Ayman F. Habib, Purdue University, USA
Time: 2:00pm to 5:00pm
Room: Room G8, Ground Level, Civil Engineering Building
Summary: In the last few years, the mapping community has witnessed significant developments in using photogrammetric and LiDAR technologies to provide a wide range of products. These developments can be ascribed to 1) the reduced cost and improved performance of modern digital cameras operating in different bands of the electromagnetic spectrum , 2) the continuous developments in laser scanning and ranging systems, 3) the capability of GNSS/INS georeferencing systems in providing accurate position and orientation information for the utilized platforms, 4) the incorporation of multiple cameras and/or laser scanners onboard a single platform, 5) the emergence of non-traditional mapping platforms such as unmanned autonomous systems, 6) the convergence of research efforts from the mapping and computer vision communities, and 7) the increased demand for geospatial data to satisfy the needs of non-traditional applications (e.g., precision farming, infrastructure monitoring, powerline clearance evaluation, and construction engineering management). This workshop will address the recent developments in the photogrammetric and LiDAR mapping technologies and their impact on the way we are conducting geospatial data acquisition and manipulation.
Starting with a brief description of the operational principles of photogrammetric and LiDAR mapping, the workshop will proceed by a discussion of the necessary quality assurance and quality control procedures for ensuring/checking the accuracy of the mapping process in light of recent developments in the area of GNSS/INS direct georeferencing as well as utilization of low-cost multi-sensor systems (this will also address the stability analysis of the evaluated system calibration parameters). The derivation of precise point clouds from photogrammetric and LiDAR systems will be also covered while highlighting the pros/cons of the different technologies as well as different options for the registration and segmentation of such point clouds. Finally, the workshop will conclude by the integration of photogrammetric and LiDAR data for true orthophoto and digital building model generation.