Core Viewpoint - The project aims to unify the historical reference benchmarks of tidal stations with the 1985 National Elevation Benchmark, enhancing the accuracy and reliability of elevation control systems for various applications [1] Group 1: Project Overview - The project involves the technical design review of the tidal station leveling measurement service for six stations: three on land (Gaolan, Dongping, Shapa) and three on islands (Guishan, Shangchuan Island, and Wailianding) [1] - The review meeting was organized by the Zhuhai Ocean Center of the Ministry of Natural Resources, with participation from various expert units [1] Group 2: Technical Significance - The project employs global navigation satellite system elevation measurement and leveling methods to accurately transfer the 1985 National Elevation Benchmark to the six tidal stations [1] - The project is recognized for its advanced precision indicators, which are considered to be at a leading level domestically [1] Group 3: Applications and Recommendations - The unified and high-precision elevation control results will support core activities such as marine disaster prevention, ecological monitoring, and natural resource management [1] - Experts recommend promoting and applying the project results due to its significant theoretical and practical value [1]

Core Viewpoint - The article highlights the evolution and technological advancements of Ningbo Shanghang Surveying and Mapping Co., Ltd. (Shanghang Surveying) in the field of marine surveying, showcasing its transition from traditional methods to modern, high-precision techniques that significantly enhance operational efficiency and data accuracy [2][4][10]. Group 1: Technological Advancements - Shanghang Surveying has developed proprietary software for magnetic anomaly inversion, achieving a positioning accuracy within 5 centimeters for underwater cable surveys [2]. - The company transitioned from manual depth measurement methods to advanced technologies such as multi-beam sonar and unmanned vessels, completing in one day what previously took weeks [2][5]. - The integration of drone technology with unmanned boats has improved surveying precision from meter-level to centimeter-level, enabling real-time data transmission and 3D modeling [6][9]. Group 2: Historical Context - The company’s history dates back to 1984, when traditional methods relied on lead weights for depth measurement, which were inefficient and inaccurate [4]. - The introduction of microwave positioning technology in the 1990s marked a significant turning point, allowing for precise positioning of construction vessels [4]. - By the 21st century, the advent of global positioning systems revolutionized the industry, reducing the manpower required for surveying tasks [5]. Group 3: Contributions to Industry - Shanghang Surveying has played a crucial role in various port construction projects, both domestically and internationally, including in Cambodia and Uruguay, enhancing maritime safety and operational efficiency [6][9]. - The company has developed patented technologies that support coastal water quality monitoring and pollution prevention, contributing to environmental sustainability [9]. - Its innovations have positioned Shanghang Surveying as a leader in the marine surveying sector, transitioning from a service provider to a standard setter in the industry [7][10]. Group 4: Future Directions - The company is leveraging digital twin technology and big data analytics to enhance urban planning and environmental monitoring, showcasing its commitment to integrating advanced technologies into its operations [11][12]. - The launch of the "Comprehensive Information Management System" aims to provide real-time monitoring for port operations, further solidifying its role in the digital transformation of the marine surveying industry [12].