Measuring Water Levels by Handheld Smartphones – A contribution to exploit crowdsourcing in the spatio temporal densification of water gauging networks

Elias, Melanie; Maas, Hans‐Gerd

doi:10.58440/ihr-27-a01

Cited by 4 publications

(1 citation statement)

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“…Recently, numerous opportunities have opened up for the application of crowdsourcing in the applied sciences, especially given the breadth of its use and the possibilities of using smartphones. In [32], authors explore the possibility of using a mobile application to involve users in water level measurements.…”

Section: Literature Review / Pregled Literaturementioning

confidence: 99%

Comparison of Hydrographic Survey Data with Crowdsourced Bathymetry Data

Radić¹,

Pavić²,

Mišković³

2023

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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.

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Section: Literature Review / Pregled Literaturementioning

confidence: 99%