Visualization of uncertain ocean boundaries

Authors: Hyowon Ban*, California State University, Long Beach
Topics: Cartography, Geographic Information Science and Systems, Oceanography
Keywords: ocean boundary, time series, uncertainty, visualization, GIScience
Session Type: Paper
Day: 4/3/2019
Start / End Time: 8:00 AM / 9:40 AM
Room: Roosevelt 2, Marriott, Exhibition Level
Presentation File: No File Uploaded

Generally, most of ocean features such as seas and bays have fuzzy and continuous boundaries rather than crisp boundaries. The boundaries of some of the ocean features are defined by certain attributes such as degrees of water temperature and salinity. Since values of the water temperature and salinity change through time and depth of water, we could say that there exists uncertainty in defining the continuously changing boundaries of some of the ocean features. Such uncertainty can be problematic for researchers and other stakeholders to make decisions regarding the ocean feature boundaries. Due to the reason, it is necessary to represent the boundaries of the ocean features using dynamic visualization methods such as three dimensional animation techniques.

This research provides an example visualization of the uncertain ocean feature boundaries based on existing definitions and empirical data of some ocean features around South Korea. The data include water temperature and salinity measurement in the study areas by time and depth and they are interpolated. The uncertainty of the boundaries of the ocean features are measured by using fuzzy-set approach. Lastly, the boundaries of the ocean features are visualization in three dimensional animation.

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