Aggregation Methods Using Bathymetry Sources of Differing Subjective Reliabilities for Navigation Mapping

Details

• Journal Title:
  Marine Geodesy
• Personal Author:
  Elmore, Paul ; Calder, Brian ; Petry, Fred ; Masetti, Giuseppe ; Yager, Ron
• NOAA Program & Office:
  NOS (National Ocean Service)
• Description:
  When planning for ship navigation or compiling data for a bathymetry map, the navigator or mapper uses many different sources of bathymetry information and navigation hazards. The quality of these sources is inconsistent in general, however, making it challenging to provide a coherent picture for planning. Here we describe an approach for consistent planning/mapping that uses a combination of soft computing and Bayesian estimation. The case study used to exercise this system involves NOAA Electronic Nautical Charts for an area in the Chesapeake Bay. We first interpolate each set of irregularly spaced soundings to gridded versions of each point-cloud set. Each of these intermediate grids are then aggregated into a fused bathymetric realization using Order Weighted Averaging (OWA) to provide the weights for each source based on their subjective reliabilities. The OWA allows for fusion informed by the user's subjective risk allowed in the reconstruction of the seafloor surface and provides quantitative methods to generate, use and record subjective reliability weights. Each sounding point that went into the bathymetry estimate is then categorized as "no-go", "caution" or "go" status. Reliability estimates are reused for weighted Bayesian categorization of each output grid cell to compute the navigable surface.
• Keywords:
  Bathymetric Maps Bayesian Statistical Decision Theory Navigation Bathymetric Maps Bayesian Statistical Decision Theory Bathymetry Fusion Bayesian Categorical Estimation Navigation Risk Oceanography Order Weighted Average
• Source:
  Marine Geodesy, 1-25
• DOI:
  https://doi.org/10.1080/01490419.2023.2166173
• Format:
  PDF
• Document Type:
  Journal Article
• Funding:
  NA20NOS4000196
• Rights Information:
  Accepted Manuscript
• Rights Statement:
  The NOAA IR provides access to this content under the authority of the government's retained license to distribute publications and data resulting from federal funding. While users may legally access this content, the copyright owners retain rights that govern the reproduction, redistribution, and re-use of this work. The user is solely responsible for complying with applicable copyright law.
• Compliance:
  Submitted
• Main Document Checksum:
  urn:sha-512:66aaca327b17356578332403b0cb49febf926773923aad14e87f9f213d14bda2563e8ce6ebc0c4baefa1896485bfbfde559c67ce9b9cb127d7f81cf92ffe137d
• Download URL:
  https://repository.library.noaa.gov/view/noaa/48628/noaa_48628_DS1.pdf
• File Type:
  [PDF - 2.28 MB ]