Abstract Marine Volunteered Geographic Information (informally “crowdsourced bathymetry”) has raised much interest within the authoritative hydrographic community as a means to cheaply gather information to satisfy chart updating requirements. So far, however, a routine path to the official chart has been rare, mainly due to lack of calibration and other metadata that would satisfy liability concerns. As an alternative to these ideas, a data collection system is proposed which, by design, can auto-calibrate and provide other data quality guarantees, and thereby generate data that by construction should be qualified for hydrographic use. This idea is termed here Trusted Community Bathymetry (TCB). A design for such a system is outlined, and its performance demonstrated experimentally through a prototype system based on a low-cost, post-processed GNSS receiver and NMEA data logger. By comparison against NGS control and survey-grade GNSS equipment, it is shown that the TCB system achieves centimeter to decimeter-level positioning in 3D, auto-calibrates vertical offsets to the sonar transducer within a decimeter, and provides realtime uncertainty estimates for ellipsoid-referenced soundings. Additionally, in an underway field trial, the total vertical uncertainty of the soundings is shown to be within the limits required for IHO Order 1b (S.44, 5 Ed.) surveys.

中文翻译：

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可信社区测深系统的设计

摘要 海洋志愿地理信息（非正式地称为“众包测深”）作为一种廉价收集信息以满足海图更新要求的手段，引起了权威水文界的极大兴趣。然而，到目前为止，官方图表的常规路径很少见，主要是由于缺乏校准和其他可以满足责任问题的元数据。作为这些想法的替代方案，提出了一种数据收集系统，该系统在设计上可以自动校准并提供其他数据质量保证，从而生成通过构造应符合水文使用条件的数据。这个想法在这里被称为可信社区水深测量 (TCB)。概述了这种系统的设计，并通过基于低成本的原型系统通过实验证明了其性能，后处理的 GNSS 接收器和 NMEA 数据记录器。通过与 NGS 控制和测量级 GNSS 设备的比较，表明 TCB 系统实现了厘米到分米级的 3D 定位，自动校准了分米内声纳换能器的垂直偏移，并提供了椭球的实时不确定性估计。参考音。此外，在正在进行的现场试验中，测深的总垂直不确定度显示在 IHO 1b 号命令（S.44，第 5 版）调查要求的限制范围内。并为椭球参考探测提供实时不确定性估计。此外，在正在进行的现场试验中，测深的总垂直不确定度显示在 IHO 1b 号命令（S.44，第 5 版）调查要求的限制范围内。并为椭球参考探测提供实时不确定性估计。此外，在正在进行的现场试验中，测深的总垂直不确定度显示在 IHO 1b 号命令（S.44，第 5 版）调查要求的限制范围内。