This session is dedicated to enhancing surveying accuracy, efficiency, and data integration through advanced technology and methodologies. Talks will address the complexities of merging various geodata sources – such as GPS, total station measurements, lidar, and photogrammetry – into cohesive and consistent datasets, as well as ways to utilize other platforms for collecting data, including UAVs and more. Attendees will gain insights into managing inconsistencies and understanding instrument-specific impacts on data accuracy. Together, these talks provide an informative look at modern surveying practices and emerging challenges in geospatial data accuracy and consistency.
Mastering Large Projects: Combining Surveying, GIS, Lidar, and Free Data.
While there’s a wealth of free geodata available, including multiple temporal iterations over the same area, it often doesn’t align with the latest field surveys or commissioned orthophotos. Merging data, updating databases, and remote data management are common practices. But what if the merged data contains inconsistencies and offsets? How do we resolve these issues accurately? This presentation covers surveying with GPS, total station, and leveling, along with Lidar-based point clouds and photogrammetry. Additional geodata sources from county and state agencies, and Professional Land Surveyors subdivision plats. We’ll share insights on instrument-specific impacts on data and provide background information on acquisition technology, drawing from years of expertise. Presented by Philipp Hummel, CopmassData.
Uncommon LiDAR Tips and Techniques
While LiDAR is a hot topic and equipment is reducing in price, many firms standing a UAS program with LiDAR may not understand why LiDAR is flown differently than its photogrammetry partner. LiDAR is not a “set it and forget it” application; planning and forethought must be included n any mission plan regardless of experience and historical knowledge. Understanding WHY drones with LiDAR are flown a specific way will greatly increase accuracy, precision and efficiency. In this session attendees will learn tips and techniques that are not well understood or commonly discussed, and gain knowledge rarely found, particularly given the nascent nature of low altitude, low speed flight. Key Topics include: Understanding Manual flight and resolution Managing/setting Angle of beam in high wall for mining, or other vertical operations Managing/setting Angle of beam in deep ravines A case study of capturing basalt cliffs along the Columbia where humans cannot easily access the area due to rough water below, extreme high winds above, and loose material at the cliff edges. Preseted by Brady Reisch, The LiDAR PROs, LLC.
Maximizing the Accuracy of Imaging Systems
Over the last two decades, digital airborne imaging system have utilized image sensor technology with larger and larger arrays, and smaller and smaller detectors on those arrays. Lens technology has evolved in parallel allowing for a wide range of options now available for mid-format and large-format composite imaging systems generating 500 mega-pixel image frames, or larger. This represents a 15-fold increase in imaging performance over the earliest generation, frame-based systems. 1 Giga-pixel, commercial airborne imaging systems are on the horizon as CMOS sensor technology continues to advance. With these advancements, geospatial data users look to ensure that the imagery-based products produced by these high pixel count systems continue to maintain the spatial detail and accuracy they expect at their prescribed pixel resolutions. This presentation will discuss processes used in imaging system manufacturing to ensure resolution performance and emerging requirements for testing and reporting product-level resolution and accuracy performance of airborne imaging systems.
Presented by Layton Hobbs, Leica Geosystems.
