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  • New Simulation and Fusion Techniques for Assessing and Enhancing UAS Topographic and Bathymetric Point cloud Accuracy

    Creator:
    Slocum, Richard K.
    Abstract:
    Imagery acquired from unmanned aircraft systems (UAS) and processed with structure from motion (SfM) – multi-view stereo (MVS) algorithms provides transformative new capabilities for surveying and mapping. Together, these new tools are leading to a democratization of airborne surveying and mapping by enabling similar capabilities (including similar or better accuracies,...
    Resource Type:
    Dissertation
    Full Text:
    , an open source computer graphics software, for the generation of photogrammetrically-accurate

  • Automation and Evaluation of Graduated Dot Maps

    Creator:
    Arnold, Nicholas D.
    Abstract:
    Dot mapping is a traditional method for visualizing quantitative data, but current automateddot mapping techniques are limited. The most common automated method places dotspseudo-randomly within enumeration areas, which can result in overlapping dots and verydense dot clusters for areas with large values. These issues affect users’ ability to estimatevalues. Graduated...
    Resource Type:
    Masters Thesis
    Full Text:
    -random distribution and blue-noise pattern.……….... 8 Figure 3a. Pseudo-random dots for initialization

  • Unmanned aircraft systems for bridge inspection : testing and developing end-to-end operational workflow

    Creator:
    Gillins, Matthew N.
    Abstract:
    Bridge inspections are vital for monitoring the health and serviceability of transportation infrastructure throughout the world. However, inspections can be logistically-challenging, expensive, and dangerous. For example, inspections may require climbing, as well as the use of scaffolding, ladders, rescue boats, bucket trucks, and/or under-bridge inspection vehicles. Small, multirotor unmanned aircraft...
    Resource Type:
    Masters Thesis
    Full Text:
    . .................................................49 3A. Point Cloud of Washburn Butte and its 5 towers. Point cloud is georeferenced

  • Enhancing Detection of Marine Debris with Polarimetric Imagery

    Creator:
    Herrera, Frederick Kyle
    Abstract:
    Marine debris is a chronic and increasingly pervasive problem for coastal regions around the world. Debris poses environmental risks, threats to wildlife, and degradation of the natural environment. Recent research has shown the advantages of uncrewed aircraft systems (UAS) for detection and recognition of marine debris, including the ability to...
    Resource Type:
    Masters Thesis
    Full Text:
    that computer software was essential for not only saving images, but also adjusting the camera

  • Mapping Nearshore Bathymetry with Spaceborne Data Fusion and State Space Modeling

    Creator:
    Forfinski-Sarkozi, Nicholas A.
    Abstract:
    Despite numerous techniques for measuring and estimating water depth, bathymetry in the nearshore zone is notoriously difficult to map. Dangerous sea states, noisy environmental conditions, and expensive survey operations, particularly in remote areas, contribute to the difficulties of obtaining data along the coast. Global datasets, derived mainly from satellite altimetry...
    Resource Type:
    Dissertation