A Global Grid-based Spatial Information Organization Method for Administrative Divisions

Abstract

The invention discloses a method for organizing spatial information of administrative divisions based on a global grid. The method includes the following steps: setting the level A of the grid code, and using the point coordinates of the government offices of the administrative divisions to be identified to be located The Beidou navigation grid code of the level A grid is used as the grid code C of the administrative division 0 ; Select the identification grid level code L of the administrative division: determine the half-span code of the administrative division (M 1 , M 2 , N 1 , N 2 ); under the logo grid level code L level of the administrative division, the number of grids on the upper, lower, right and left four boundaries of the smallest outsourcing rectangle of the administrative division is represented by hexadecimal characters 0-F, respectively denoted as M 1 , M 2 , N 1 , N 2 ; with (C 0 , L, M 1 , M 2 , N 1 , N 2 ) as the administrative division code; obtain the attribute information and spatial information of the administrative division, establish a spatial information table, and use the administrative division code as the primary key to record the attribute information and spatial information of the administrative division unit in the spatial information table.

Description

technical field [0001] The invention relates to the technical field of subdivision and organization of geospatial information, in particular to a method for organizing spatial information of administrative divisions based on a global grid. Background technique [0002] Administrative division codes can be divided into numeric codes, letter codes and mixed codes according to different forms of expression, hierarchical codes and non-hierarchical codes according to whether they reflect the structural characteristics of administrative divisions, and can be divided into sequential codes, Abbreviation codes, combined codes, etc., are rare random meaningless unique codes. [0003] When international organizations or research institutions involve transnational data processing and information exchange, they usually use UN M49, ISO3166, FIPS 10-4 / GENC, HASC, SALB, NUTS and other global or regional administrative division uniform codes. According to the compilation method, the above c...

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Problems solved by technology

[0008] On the one hand, although the standard coding granularity of various countries is sufficient, its design is closely related to its own characteristics. Structural features such as digital or alphabetic, divided into several layers, and the number of layers in each layer are directly related to factors such as the scope of administrative divisions. It is difficult to directly promote the uniform coding of global administrative divisions

For example: Russia's administrative division code is divided into three layers, and if it is used for my country's six-level division or India's fourth / fifth-level division, there will be fewer identification levels. India's division type does not match

[0009] On the other hand, according to the current coding principle of unified coding of global administrative divisions, when the coding granularity is increased to all levels, there are many administrative division units that need to be coded, and the workload of coding is huge. The coding value of the administrative division unit cannot be determined by its own information. Problems such as duplicate names, different words with the same pronunciation, the same initial letter, new and old divisions and other issues have exacerbated the complexity of coding. The workload limits the encoding granularity

[0010] The existing administrative division coding methods are difficult to balance the coding range and coding granularity, and there are still few coding systems that can support the unified identification of administrative divisions at all levels in the world

[0011] (2) It is difficult to support the description of any location within the administrative division

[0012] The administrative division codes of some countries such as the United Kingdom, the United States, and China can be extended to finer granularity, beyond the scope of administrative divisions. In essence, this is a manifestation of the scalability of administrative division codes, describing the internal location of administrative divisions. There are two problems in the traditional method: first, it only expands downwards from the finest level or a specified level, and does not provide internal location description methods for all levels of administrative divisions; second, the area boundaries represented by codes are artificially defined as It is usually only mastered by individual departments, and the scope and accuracy of the division of urban areas are better than those of rural areas.

However, the traditional method follows the idea of ​​administrative division coding. The coding in sequence or abbreviation contains limited effective information and does not have the ability to split. Therefore, it cannot support the description of any location within the administrative division, which is not conducive to the refined sharing and sharing of spatial data.

[0014] (3) It is not conducive to the associated application of administrative division data

However, the continuity of longitude and latitude leads to the infinity of coordinate points, and there are shortcomings in the identification of regional administrative division units and spatial locations, which is not conducive to the associated application of data

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