How Do I Become a Marine Surveyor?

The Guangzhou Maritime Surveying and Mapping Center (formerly the Guangdong Maritime Surveying and Surveying Brigade) is a member of the South China Sea Navigation Support Center of the Ministry of Transport. It is the largest A-level marine surveying and mapping team in South China. Responsible for the periodic survey of ports and waterways in the three provinces (regions) of Guangdong, Guangxi, and Hainan along the coast of South China and the publication and distribution of more than 140 charts. It is mainly engaged in marine surveying and mapping, geographic information system engineering, chart preparation, port engineering survey, and hydrological survey. , Submarine topographic survey and control survey, coastal tidal flat terrain survey and other business work. Guangzhou Maritime Surveying and Mapping Center, in accordance with the general requirements of Strong political, leading technology, first-class service, and strong guarantees put forward by the Ministry of Transport, takes the core values of rooting the rivers and seas, fine navigation routes and the core concept of accurate current situation, tolerance and hard work Each port and shipping unit provides navigation safety guarantee services. ^[1]

Guangzhou Maritime Surveying and Mapping Center

Right!

Guangzhou Maritime Surveying and Mapping Center

1. Carry out and implement national maritime surveying and mapping development strategies, policies, laws and regulations, and implement relevant international conventions and technical specifications.

2. Participation in maritime affairs as entrusted

The center has nearly 200 employees, including 66 professional and technical personnel (excluding ship series), 24 with senior professional qualifications, 25 with intermediate professional qualifications, and 14 with assistant professional qualifications. They have passed A, B international

In 2013, the Guangzhou Maritime Surveying and Mapping Center had a total of 5 professional surveying ships, namely, the sea cruise 1760, sea cruise 1761, sea cruise 1762, sea cruise 17070, and sea cruise 17071.

Perfect infrastructure and advanced technical equipment are inevitable requirements for the international development of maritime surveying and mapping. The equipment of Guangzhou Maritime Surveying and Mapping Center is as follows:
Mapping equipment:
Single beam

Guangzhou Maritime Surveying and Mapping Center (formerly the Guangdong Maritime Surveying and Surveying Brigade) adheres to independent innovation and possesses Grade A marine surveying and mapping qualifications. From sextant to microwave locator to satellite locator, from hydrographic sounding to single-beam to multi-beam scanning, from manual drawing to machine-assisted mapping to electronic chart, from automation to digitization to informationization, maritime surveying and mapping productivity Every leap is inseparable from technological progress.

Positioning Technology:

From the original sextant and theodolite positioning, to radio and microwave positioning, to RBN / DGPS differential positioning, satellite wide area differential positioning, positioning technology has realized the transition from manual to automatic, discrete single-point positioning to continuous positioning, fundamentally Improved positioning accuracy.

Sounding technology:

From Shui Tuo, sounding rod sounding, to single-beam, four-beam sounding, to multi-beam full-coverage scanning, sounding technology has realized the transition from manual to automated, point sounding to line sounding to surface sounding. , Which fundamentally improves the sounding accuracy.

Drafting process:

From the original pure manual writing, small aircraft template drawing, to computer-aided drawing, to computer-based digital drawing, to the HPD chart database, a qualitative leap in drawing technology has taken place, from paper charts to digital charts. Digitization of chart products.

Product innovation of surveying and mapping in Guangzhou Maritime Surveying and Mapping Center

1. Development of new products-grid electronic charts

The product uses the Geotiff format, and defines some GeoTags (geotags) based on TIFF to define and store various geographic coordinate systems, ellipsoid datums, projection information, etc., so that image data and geographic data are stored in the same image file in. As the first grid electronic chart released in China, RNC has broadened the variety of maritime surveying and mapping products, which is a powerful reflection of maritime surveying and mapping's commitment to promote the expansion of the service field and enhance the influence of maritime surveying and mapping products.

2. Development of New ProductsCompilation and Development of "Pearl River Navigation Guide"

The navigation safety of the Pearl River Delta inland waterway plays an important role in ensuring regional economic development. Since 2006, the brigade has carried out surveys on the inland waterway of the Xijiang River and the lower reaches of the Feilaixia Gorge of the Beijiang River. In 2007, it was officially identified as the "Pearl River Navigation Guide" project. In 2013, the compilation and publication of the (1)-(4) volumes of the "Pearl River Navigation Guide" have been completed, and the supporting electronic charts have also been released to the public. This is the first time that the scope of maritime surveying and mapping has expanded from the coast to an important inland waterway, and it reflects the team's determination and ability to actively perform the "three active services". The publication and publication of the "Pearl River Navigation Guide" has completely changed the backward situation of the lack of Pearl River shipping books, provided reliable navigation instructions for the majority of ship users sailing in the area, provided corresponding technical support for port construction planning and maritime management, and promoted The rapid development of inland shipping economy.

3 Development of new products-Pearl River Estuary Hydrological Information System

On October 28, 2005, the "Pearl River Estuary Hydrological Information Online Publishing System" was officially put into use. The navigation information such as tide level, wind speed, and wind direction was released to users in real time by the Internet and mobile phone messages, which improved the carrying capacity of the channel.

The Pearl River Estuary Hydrological Information Network system consists of seven hydrological stations and a data processing center. The seven hydrological stations are reasonably distributed on both sides of the main channel of the Pearl River Estuary, and the data center is located in the office building of the sea survey team.

4 Asian Games dedicated chart

In 2010, the Surveying and Mapping Center launched the "Marine Surveying and Mapping Data Acquisition Process Research" project, which successfully developed 360-degree panoramas, animation of ship navigation and berthing guidelines, 3D modeling of important objects, simulation of underwater landscapes, and high density. Five kinds of electronic chart results, and successfully used in Asian Games security services. The series of results have been well received by all sectors of society, and provided technical support for the next step of diversified use of maritime surveying and mapping data.

5. 3D raster stereogram

Carry out research on 3D raster stereogram production technology, investigate the software, production and printing technology of 3D raster stereogram, complete software procurement and training, conduct 3D stereo chart trial production, and complete project research report.

6.3 3G marine intelligent electronic chart navigation system

This system makes full use of the existing surveying and mapping results resources and professional knowledge of the brigade, through the production of electronic charts and special navigation guide multimedia files, and integration into the intelligent navigation terminal. With this product, ship users can perform real-time positioning, viewing of the surrounding environment, navigation water depths and various navigational aid object displays, and through personalized system settings, intelligent navigation of the optimal route, various danger situations and early warning of navigation Text and voice prompts for messages.

Research on Surveying and Mapping Technology of Guangzhou Maritime Surveying and Mapping Center

The Surveying and Mapping Center attaches great importance to the research of marine surveying and mapping technology, including the assessment of the scientificity and rationality of the current tide datum in each port area, offshore tide level control technology, non-tide measurement technology, long-range (cross-island) level measurement technology, dynamic tide and Dynamic water depth technology, etc. Carried out in-depth research on measurement equipment and software, including multi-beam measurement theory and application, acquisition and processing analysis of shallow stratum profile measurement systems, side-scan sonar measurement software and data processing methods, and technology and application exploratory research on Beidou and CORS. Improve the center's marine surveying and mapping technology.

1. Carry out a unified land and sea elevation benchmark study

Carry out research on the special project of "Land and Sea Unified Elevation Benchmark Establishment Project" for aerial survey. The construction content of this project is mainly to use GPS positioning technology, leveling technology, tide analysis technology, gravity data and DTM model data in the Pearl River Estuary waters to establish a high-precision geoid-like grid model and depth datum model. The hydrological station's level point is incorporated into the national space coordinate datum frame to achieve the unification of the depth datum and the national land elevation datum, and to transfer the land datum to the islands in the waters of the Pearl River Estuary to achieve the unification of land and sea mapping datum.

2. On-line service system of real-time and forecast water depth charts for the main channel of the Pearl River Estuary

The Pearl River Estuary main channel navigation chart real-time and forecast water depth online service system is based on the existing regional electronic chart-based online service platform in conjunction with the Pearl River Estuary hydrological information system (the existing port online real-time tide monitoring network) in real-time acquisition. The tide level data and the latest electronic chart resources can realize the superimposed display of high-density water depth data and real-time / astronomical forecast tide levels of the main channel of the Pearl River Estuary (polyline fairway is about 120 kilometers long), real-time online real-time on-line chart tide levels and high-density water depths. With dynamic changes.

3 Carry out GPS Beidou non-tidal water depth survey

Using the existing models such as the geoid, seamless depth datum, and vertical datum seamless transition in the Pearl River Estuary waters, the GPS and BD-based non-tidal water depth measurement theory and method based on GPS + BD are demonstrated in the Pearl River Estuary waters. The tide-free water depth measurement technology with accuracy requirements lays the foundation for the widespread application of the tide-free technology. This year, we will focus on the preparation of the project.

4 Hong Kong-Zhuhai-Macao Bridge Navigation Environment Data Service System

Established a spatial data service framework for the Hong Kong-Zhuhai-Macao Bridge area, and realized the implementation of multiple sources and types of spatial data including electronic charts, remote sensing images, hydrometeorology, underwater terrain, panoramic data, three-dimensional models, navigation management elements, and other types of spatial data. Integration and release, and provide OMS standard data service interfaces such as WMS, WFS.

5. Exhibition based on Beidou CORS coastal station research

The center organized a research group to carry out CORS (Continuous Operation Satellite Positioning and Navigation System) application research. Through research, the status and usage of CORS stations in the South China Sea can be basically grasped, the necessity and feasibility of installing GORS base stations in important coastal ports can be evaluated, and the distribution and investment of the stations can be analyzed and evaluated. In the medium and long term, it is optional to establish N permanent GPS continuous reference stations in the South China Sea. Through data communication networks and wireless data transmission networks, it can provide network coverage areas to users who need measurement and navigation in a fully automatic, all-weather, and real-time manner. High-precision 3D coordinates and time information.

6. Carry out research on seaworthy water depth and floating mud observation technology

Carrying out floating mud observation research, especially the research of floating mud thickness and seaworthy water depth, has always been a problem of great concern in the design and operation of port and waterway engineering. The reasonable determination of the thickness of the floating sludge and the seaworthy water depth are related to the investment of navigation safety and dredging engineering; the research and application of seaworthy water depth can ensure navigation safety, save engineering economic investment, and have high social and economic value. The center has introduced the world-class Silas sailing floating mud measurement system from abroad, providing reliable measurement data and results for floating mud research and determination of seaworthy water depth.

The Silas seaworthy depth measurement system effectively solves the problem of large-area seaworthiness depth measurements, and provides users with intuitive, reliable and continuous measurement data. It has been widely used in Shenzhen Dachan Bay, Guangzhou Nansha Port, and desktop power plants. It has ensured the safe navigation and berthing of the ships in the port, made reasonable use of the port's water depth resources, saved dredging costs, and achieved gratifying direct economic and port benefits. ^[3]