The Global Navigation Grid Code (GNGC) is a
Chinese-developed point reference system designed for global
navigation. It is similar in design to
national grid reference systems used throughout the world. GNGC was based upon the work of the GeoSOT team, headquartered in the
Institute of Remote Sensing and GIS
An institute is an organisational body created for a certain purpose. They are often research organisations ( research institutes) created to do research on specific topics, or can also be a professional body.
In some countries, institutes ca ...
,
Peking University
Peking University (PKU; ) is a public research university in Beijing, China. The university is funded by the Ministry of Education.
Peking University was established as the Imperial University of Peking in 1898 when it received its royal charter ...
. The concept for this system was proposed in 2015 in Bin Li's dissertation: ''Navigation Computing Model of Global Navigation Grid Code''. GNGC allows easy calculation of space and
spatial indexes and can be extended to the provide
navigation mesh A navigation mesh, or navmesh, is an abstract data structure used in artificial intelligence applications to aid agents in pathfinding through complicated spaces. This approach has been known since at least the mid-1980s in robotics, where it h ...
coding. Along with the
Beidou navigation system, GNGC provides independent intellectual property rights, globally applicable standards and global navigation
trellis
Trellis may refer to:
Structures
* Trellis (architecture), an architectural structure often used to support plants (especially vineyards)
* Trellis drainage pattern, a drainage system
Technology
* Trellis (graph), a special kind of graph used ...
code.
History
From 2009-2013 a research team (the Institute of Remote Sensing and GIS School of Earth and Space Science located at Peking University), in conjunction with
Wuhan University, Information Engineering University,
Chinese University of Science and Technology
Chinese can refer to:
* Something related to China
* Chinese people, people of Chinese nationality, citizenship, and/or ethnicity
**'' Zhonghua minzu'', the supra-ethnic concept of the Chinese nation
** List of ethnic groups in China, people of v ...
,
National University of Defense Technology, completed the National 973 Project: "Global Spatial Information Subdivision Theory and Application Method". As a result of this effort, the team proposed a global subdivision grid frame: Geographic Coordinate Subdivision Grid With One Dimension Integer Coding on 2
n Tree (GeoSOT). This work solved the three scientific problems with regards to spatial data organization: basic frame, location code and presentation model.
This work resulted in 28
patent applications. The results of the project were published in a work entitled: ''Introduction to Spatial Information Subdivision''.
Design
GeoSOT, is a grid system that originates from a center point on earth and climbs to another point at 50,000 km altitude. It subdivides the earth according to 32 levels into millions of grids 1 cm
2 in size. The team proposed a complete area location coding system called "1+4 basic code, N serial extended codes". Above these codes, the global subdivision grid code is a basic one and it has been completed.
GNGC is part of research on Global Sub-division Grid (GSG, or global discrete grid, geographic grid or spatial information grid). It subdivides the earth's surface into small cells. The research of GSG covers the methods of how to subdivide the earth into cells of equal size and shape at different levels. GSG improves the proficiency of the spatial information presentation and data organization. GSG is one of the key methods in geo-information science.
Applications
Main applications include geographic spatial data fusion, multi-source data fusion and geo-science comprehensive analysis.
It can mark location and position elements on a grid. The truing number coding design can simplify location area identification, expression and calculation.
See also
*
Discrete Global Grid
References
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Geographic coordinate systems