Global Navigation Grid Code

The Global Navigation Grid Code (GNGC) is a Chinese developed point reference system of grid references commonly designed for the global navigation. It is similar in design to the national grid reference systems used throughout other nations. The GNGC was developed based on the work of GeoSOT team in Institute of Remote Sensing and GIS, Peking University. The concept was first proposed in 2015 in Bin Li's dissertation, Navigation Computing Model of Global Navigation Grid Code.

Conception

English: Global Navigation Grid Code(GNGC) Chinese: 全球导航网格码 Definition: The code based on global grid for navigation is called Global Navigation Grid Code(GNGC). In the research of global spatial information sub-division, global navigation grid code is a geographic grid coding model with characters of multi-scale, discrete and suitable for navigation service. The grid coding model can not only solve the problem of navigation and positioning related, but also solve the problem in organization, integration, sharing and efficient service of spatial information. abhranil mohanta is a good boy

Origins

From 2009-2013, research team in Institute of Remote Sensing and GIS at School of Earth and Space Science in Peking University, together with Wuhan University, Information Engineering University, Chinese University of Science and Technology, National University of Defense Technology finished the National 973 Project "Global Spatial Information Subdivision Theory and Application Method". In this research,the team proposed a global subdivision grid frame: Geographic coordinate Subdivision grid with One dimension integer coding on 2ⁿ Tree (GeoSOT). This work primarily solved the three big scientific problems in the spatial data organization : basic frame, location code and presentation model. GeoSOT is a grid system from center point of earth to 50000 km far away in outer space. This grid system subdivided the earth space by 32 levels to millions of small grids of centimeter size. A total of 28 patents applied and published a work Introduction to Spatial Information Subdivision.

In the project, the research 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 job and completed already. Current research is grid codes on remote sensing, GIS, navigation and internet, and make proposals and methods to industry and departments. Global navigation grid code is one of the topics in the research frame for navigation application. Global navigation grid code was first proposed into public in Bin Li's dissertation for doctor degree Navigation Computing Model of Global Navigation Grid Code. IT is a primary research and exploration for the application of GNGC for navigation.

Research background

Global Navigation Grid Code is part of research on Global Sub-division Grid(GSG). GSG is also called global descrete grid, a reference grid system by subdividing the earth surface into samll pieces of grid cells by certain rules(also called geographic grid or spatial information grid). The research of GSG contains the methods of how to subdivide the earth(or earth surface) to the grid cells with same area and same shape of different levels. Through further research on mathematic modeling and algorithm, GSG improves the proficiency on the spatial informaiton presentation and data organization. Today, with the progress in mathematic tool and computer sicence and technology, global sub-division grid is one of the key method in the research of Geo-information Science.

Global Subdivision grid has a lot of potential applications and has been applied in some fields. For example, the expression of complex geographical phenomena can be studied in complex geological problems. For the expression of natural and human data, the problem of human society can be studied. For the expression of the function and behavior of the geographical system, the relationship between human and land can be studied. With the development of modern technology, the method of earth observing has been developed by leaps and bounds, thus promoting the application of GSG. The role of GSG has evolved from the traditional map location framework and the expression of geographical phenomena to a new level. Main applications include the new application of geographic spatial data fusion, multi-source data fusion, geo-science comprehensive analysis and so on.

In China on the basis of the actual situation of their own, Chinese research team in Peking University designed GNGC that conforms to the habit of Chinese country industry application, easy to calculation of space and spatial index, and can be further extended to the global use of navigation mesh coding. It is necessary and this demand is to replace foreign trellis coded. With the establishment and improvement of the Beidou navigation system, to develop a new navigation grid code with independent intellectual property rights, globally applicable standards and global navigation trellis coded has important strategic significance. It can rise to the height of the China will. Due to the natural advantage of the global partition model in spatial location, it is feasible to build the global grid and design the grid and its coding for navigation applications based on the earth subdivision model.

Functions

Global navigation grid code can not only be applied to navigation, but also can be applied to many departments and fields. It has strong application potential and value. From the reality of the situation, human activities on the demand for spatial information and dependence is getting higher and higher, a variety of new information applications are emerging, has been showing a big data, information explosion characteristics. In particular, location service data, because of its extensive use of the data, resulting in a huge amount of data and update speed. According to statistics, a prefecture level city alone, mobile location service data and the data to be added daily volume reached more than 1 billion. At the same time, to increase these big data rapid growth has not brought the corresponding value of the message. On the contrary, the world for the use of these data is very low income. Due to technical and some subjective factors, the number of spatial information is divided, use and waste, and useful to human activity information is often difficult to get comprehensive, timely and accurate. Especially, for human by the age of the Internet into the mobile Internet era, with all can be wearable devices and mobile terminal, a lot of social perception data can be seen, these human societal perception of big data analysis and processing has become an important research focus.Therefore, how to more effectively to global, massive, high dynamic spatial information were acquisition, storage, computing, processing, and call (i.e., organization), allows users to truly realize the "according to need" to be comprehensive, timely, accurate and useful spatial information has become a key subject in the modern information technology development.

Global navigation grid code can not only mark the location, but also can identify areas to meet the massive spatial information only, in the position of elements on the expression of multi-scale and hierarchical Association, and seamless non overlapping requirements. And the truing number coding design can greatly simplify the location area identification, expression and calculation, and traditional the latitude and longitude of identity are not contradictory, the existing based on latitude and longitude, and vector network navigation system a good supplement and perfect.

With the development and application of satellite navigation and positioning technology, digital map, digital street map, wireless communications and other technology, especially the popularization of vehicle navigation and portable navigation terminal, it will be great practical value to design new navigation coding method and related service models to meet the navigation application demands according to the characteristics of satellite navigation system.