Lasers are cool but are they better? A comparative analysis of surveying techniques

Authors: Madison Rollins and Jacob M Bateman McDonald

Affiliation: University of North Georgia

Title: Lasers are cool but are they better? A comparative analysis of surveying techniques

Keywords: terrestrial LiDAR scanner, range finder, geospatial surveying, accuracy assessment, comparative study

This poster presents a comprehensive comparison of stream surveys completed using terrestrial LiDAR scanners, laser range finders, and traditional survey tape and stadia rod techniques. Geospatial data acquisition is fundamental for various applications, including hiking trail creation and maintenance, residential and commercial construction, as well as the topic of this poster, fluvial geomorphology (specifically stream cross-sectional morphology). Understanding the capabilities and limitations of different surveying techniques and technologies is crucial for selecting the most appropriate tool for specific applications. Terrestrial LiDAR scanners utilize lasers to accurately measure distances and create detailed 3D point clouds (consisting of potentially millions of points) of the surveyed area. Their high spatial resolution and wide areal coverage make them suitable for capturing complex landscapes at multiple scales. Range finders employ optical or laser-based methods to measure distances to objects. Range finders offer the advantage of portability, allowing researchers to conduct field surveys without the burden of carrying heavy equipment, thus enhancing mobility and efficiency in data collection. Traditional (survey tape and stadia rod) surveying techniques are tried and true but the accuracy can be highly dependent on the surveyor. In this study,  field surveys were conducted to compare the terrestrial LiDAR scanner, a laser rangefinder, and more traditional surveying techniques. Factors, such as accuracy, precision, data quality, and ease of use, were used to compare the different techniques/technologies. Our findings reveal insights into the strengths and limitations of each technique, providing valuable guidelines in selecting the most suitable surveying tool for specific needs.