Preliminary communication
https://doi.org/10.17818/NM/2023/2.3
Comparison of Hydrographic Survey Data with Crowdsourced Bathymetry Data
Toni Radić
; University of Split, Faculty of Maritime Studies, Split, Croatia
Ivica Pavić
orcid.org/0000-0002-9087-3424
; University of Split, Faculty of Maritime Studies, Split, Croatia
Jakša Mišković
orcid.org/0009-0002-3785-0351
; University of Split, Faculty of Maritime Studies, Split, Croatia
Abstract
A hydrographic survey is a standardized procedure for collecting data for the production of nautical charts and publications. It is a lengthy and costly procedure, so the survey is carried out depending on the capabilities of hydrographic organizations. It is known that relatively large parts of the world’s oceans are very poorly covered by hydrographic surveys. To increase the amount of data collected, the International Hydrographic Organization (IHO) has introduced the concept of crowdsourced bathymetry (CSB). Under the CSB concept, all vessels meeting certain minimum technical requirements (carrying a global navigation satellite system and a single beam echo sounder) can participate in voluntary bathymetric data collection. The paper analyzes the method of collecting bathymetric data from CSB. The depth data collected as part of the CSB are compared with official data displayed on electronic navigational charts (ENC) in the United States of America. Four sea areas were selected in which 104 depths were compared at the same positions, and categorization was also made according to the criterion of navigational importance, i.e., the category zones of confidence (CATZOC). By comparing the official depth data from the hydrographic survey with the depth data collected from public sources for the same positions, their mutual relationships were established, from which it can be concluded that the CSB data, despite its limitations, is a very valuable supplement to the existing official data.
Keywords
crowdsourced bathymetry; hydrographic survey; category zones of confidence; electronic navigational charts
Hrčak ID:
300164
URI
Publication date:
18.4.2023.
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