CN108647332B - Administrative division space information organization method based on global grid - Google Patents
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Abstract
The invention discloses a method for organizing administrative division space information based on a global grid, which comprises the following steps: setting the used level A of the trellis code to be identifiedThe Beidou navigation grid code of the hierarchy A grid where the point coordinates of the government office location of the administrative division are located is used as the grid code C of the administrative division0(ii) a Selecting an identification grid hierarchical code L of an administrative division: determining half-span codes (M) for administrative divisions1、M2、N1、N2) (ii) a Positioning the grid number of four boundaries of an upper boundary, a lower boundary, a right boundary and a left boundary of a minimum outsourcing rectangle of an administrative division under an identification grid hierarchical code L level of the administrative division, and respectively marking as M, wherein the grid number is represented by 16-system characters 0-F1、M2、N1、N2(ii) a With (C)0、L、M1、M2、N1、N2) Coding as administrative division; acquiring attribute information and spatial information of an administrative division, establishing a spatial information table, and recording the attribute information and the spatial information of an administrative division unit by using an administrative division code as a primary key word in the spatial information table.
Description
Technical Field
The invention relates to the technical field of geospatial information subdivision organization, in particular to an administrative division spatial information organization method based on a global grid.
Background
The administrative division code can be divided into digital codes, letter codes and mixed codes according to different expression forms, can be divided into hierarchical codes and non-hierarchical codes according to whether the structural characteristics of the administrative division are embodied or not, can be divided into sequence codes, abbreviated codes, combined codes and the like according to different generation modes, and rarely has random nonsense unique codes.
When the international organization or research organization relates to transnational data processing and information exchange, the international organization or research organization generally adopts the uniform coding of global or regional administrative regions such as UN M49, ISO 3166, FIPS 10-4/GENC, HASC, SALB, NUTS and the like. According to the programming mode, the coding system can be divided into two types: firstly, the existing codes of various countries are integrated based on a uniform coding structure, and the sequencing basis, the letter extraction principle and the like are consistent with the existing codes; and secondly, completely recomposing, and adopting a new coding structure and a new coding rule.
Different existing codes have respective coding rules, and taking NUTS as an example, administrative division structures and scales of member countries of the European Union are different from each other, and the European Union statistical bureau divides the administrative division structures into entities which can be compared with each other statistically, and pushes a standard of classification of territorial units for statistics (NUTS). Nut defines five levels: the demographic characteristics of nut 1, nut 2, nut 3, LAU1 and LAU2 are the main basis for judging the home level of each administrative division, and not all countries cover the whole level of nut. NUTS codes are arranged according to a hierarchical structure, the 1 st to 2 nd digits identify countries, the countries except the United kingdom directly adopt two-digit letter codes of ISO 3166-1, the 3 rd to 5 th digits respectively correspond to the levels of NUTS1, NUTS2 and NUTS3, the levels are arranged backwards from the beginning of '1', and when the number of the level identifications exceeds 9, capitalized letters are used for continuous numbering. When the LAU1 code and the LAU2 code are used, they are linked to the nut 3 code, and thus there is a difference in LAU code structure between different member countries. The european union has targeted nut as the coding standard for its data products, and is also widely used as a cross-european standard (Europa Eurostat, 2003).
The existing administrative division coding system has the following defects:
(1) difficult-to-support global unified identification for each level of administrative divisions
The level provided by the global administrative division code with sufficient scope and uniform form is limited at present, usually only the code is identified to the first layer or the second layer of the administrative division of each country, the coding problem of fine units is less discussed, and a set of code system capable of supporting the uniform identification of the administrative division of each level of the world is lacked.
On one hand, although the standard codes of various countries have enough granularity, the design is closely related to the characteristics of the standard codes, and the structural characteristics of the standard codes, such as the number form, the letter form, the division into several layers, the digits of each layer and the like are directly related to factors such as administrative division management amplitude and the like, so that the standard codes are difficult to be directly popularized and uniformly coded in the global administrative division. For example: the Russian administrative division code is divided into three layers, the problem of few identification layers when the Russian administrative division code is used for a six-level division of China or a four/five-level division of India occurs, and moreover, the type identifier in the Russian administrative division code cannot be matched with the type of the division of China or India.
On the other hand, according to the coding principle of the current unified coding of the global administrative divisions, when the coding granularity is increased to all levels, numerous administrative division units needing coding are provided, the coding workload is extremely high, the coding value of each administrative division unit cannot be determined by self information due to the coding modes of sequence codes and abbreviated codes, the coding complexity is further aggravated by the problems of duplicate names, same-tone different characters, same initial letters, new and old divisions and the like, if the coding value is to be guaranteed to be unique, the coding process needs to be participated manually, and the huge workload limits the coding granularity.
The existing administrative division coding mode is difficult to consider both the coding range and the coding granularity, and a coding system capable of supporting global unified identification of each level of administrative divisions is still rare.
(2) Description of any location inside administrative division difficult to support
Administrative division codes in countries such as the united kingdom, the united states, the china and the like can be extended to finer granularity and exceed the category of the administrative division, and essentially, the administrative division codes are a reflection of the expansibility of the administrative division codes and describe internal regions of the administrative division, but the traditional mode has two problems: firstly, only the hierarchical level is expanded downwards from the finest level or a specified level, and an internal location description mode is not provided for administrative divisions of all levels; secondly, the regional boundary represented by the codes is mainly defined by people and generally only mastered by individual departments, and the range and the precision of the division of the urban area are superior to those of the rural area. That is, the description of the internal region by the expanded administrative division code can only be a predefined unit, and the description region or the precision cannot be determined by itself according to the application requirements.
However, natural disasters, environmental pollution and other phenomena are less restricted by administrative boundaries, spatial data are distributed unevenly geographically, and the requirements for local area description or data acquisition in the administrative boundaries are far greater than those for description or acquisition in designated units. However, the traditional method follows the idea of administrative division coding, and the codes in sequence or abbreviation form have limited effective information and do not have splitting capability, so that the description of any location inside the administrative division cannot be supported, and the refined sharing and sharing of spatial data are not facilitated.
(3) Associated applications not conducive to administrative division data
The administrative division is a dynamic system and is in continuous change, so that the administrative division code also needs to be dynamically updated, and the phenomena of code change, constant scope of the jurisdiction, or constant scope of the jurisdiction and the code occur sometimes, which affects the associated application efficiency of the data in the fields of statistics and the like. For example, the original region coding with the space-time contrast is changed, but the region coding without the contrast is the same, which results in the difficulty of the data association analysis. In addition, although the low-level administrative divisions such as the streets and the communities under the jurisdiction do not change at all, the prefixes of the administrative division codes also change. That is, when administrative changes occur, the management system is easily confused, and the maintenance is difficult because of a large update amount. Therefore, part of the coding system uses geographical range coding, which implies the spatio-temporal properties of administrative divisions, such as: the uk GSS code, UNM49, HASC, etc. only re-encode when there is a significant change in geographical range, but their encoding forms are still dominated by the abbreviated code, the sequential code.
The root reason that the existing administrative division coding system is difficult to support the unified identification, internal description or associated application of each global hierarchical administrative division is the generation mode of the administrative division coding, and sequence codes or abbreviated codes not only contain limited useful information, but also cannot be uniquely generated by the self attributes of the coded objects. The spatial information is the inherent attribute of all administrative division units, and is also the important basis for the internal region description and the spatio-temporal data association application of the administrative division. However, the continuity of longitude and latitude leads to the limitless nature of the coordinate points, and a short board exists when the regional administrative division unit and the spatial zone are identified, which is not beneficial to the associated application of data.
Disclosure of Invention
In view of the above, the present invention provides a method for organizing spatial information of an administrative division based on a global grid, which can uniformly identify the administrative division, establish a uniform code, ensure the correlation between the code and the geographical location of the administrative division, ensure the uniqueness of the code, and maintain the association relationship between the administrative division and the spatial information by using the code as the primary key of a spatial information table.
In order to achieve the above object, the administrative region space information organization method based on the global grid according to the technical scheme of the present invention comprises the following steps:
s101, positioning grid code C of administrative division0。
Setting the used level A of the grid code, and taking the Beidou navigation grid code of the level A grid where the point coordinates of the government office location of the administrative division to be identified are located as the grid code C of the administrative division0。
S102, selecting an identification grid hierarchical code L of an administrative division:
the minimum bounding rectangle of the administrative division is taken.
And mapping the minimum outsourcing rectangle of the administrative district into a GeoSOT grid with X rows and Y columns according to a GeoSOT grid subdivision mode, wherein the GeoSOT grid level of the X rows and the Y columns obtained by mapping corresponds to the level A.
And when max (X, Y) >16 is judged, upwards aggregating the GeoSOT grids into the GeoSOT grid of the previous level until max (X, Y) is less than or equal to 16, taking the grid of the corresponding X 'row multiplied by Y' column as an identification grid set, and taking the corresponding GeoSOT level as an identification grid level code L of the administrative division.
S103, determining a half span code (M) of an administrative division1、M2、N1、N2)。
Positioning the grid number of four boundaries of an upper boundary, a lower boundary, a right boundary and a left boundary of a minimum outsourcing rectangle of an administrative division under an identification grid hierarchical code L level of the administrative division, and respectively marking as M, wherein the grid number is represented by 16-system characters 0-F1、 M2、N1、N2。
S104, and (C)0、L、M1、M2、N1、N2) As administrative division coding.
And 2, acquiring attribute information and spatial information of the administrative divisions, and establishing a spatial information table, wherein the spatial information table takes the administrative division codes as primary keys and records the attribute information and the spatial information of the administrative division units.
Preferably, after step 1 and before step 2, the method further comprises the following steps:
step 11, determining a location short code of any coordinate point p in the administrative division; the method specifically comprises the following steps:
s1101, obtaining the boundary of the administrative division, calculating all L-level GeoSOT grids passed by the boundary section by section, and calculating the internal L-level GeoSOT grids among the boundary grids row by row to obtain a layer 1 zone grid set.
S1102, carrying out row numbering and column numbering on the layer-1 bit grid set, wherein the row numbering and the column numbering are marked by 16-system characters, and the combination of the row numbering and the column numbering of the layer-1 bit grid where the coordinate point p is located is used as a layer-1 bit short code.
S1103, dividing the n-1 layer region grid where the coordinate point p is located by 16 × 16, wherein n is larger than or equal to 2, obtaining the n-layer region grid, the n-layer region grid is the (L +4(n-1)) th-level GeoSOT grid, carrying out 16-system row numbering and column numbering on the n-layer region grid set, and taking the combination of the row numbering and the column numbering of the n-layer region grid where the coordinate point p is located as the n-layer region short code.
And S1104, repeatedly executing S1103 until (L +4(n-1)) < 32 is not established any more, and combining the 1 st zone bit short code to the nth zone bit short code to be used as the zone bit short code of any coordinate point p in the administrative region.
The step 2 further comprises:
acquiring spatial information of any coordinate point p in the administrative district, establishing a spatial information additional table, and recording the spatial information of any coordinate point p in the administrative district by taking the administrative district code and the zone bit short code of the coordinate point p as main keywords in the spatial information additional table.
Further, level a takes a value of 7.
Has the advantages that:
1. the invention provides a method for organizing administrative division spatial information based on a global grid, which can uniformly identify administrative divisions, establish uniform codes, support all levels of the administrative divisions in the world, ensure the correlation between the codes and the geographic positions of the administrative divisions, ensure the uniqueness of the codes, and maintain the association relationship between the administrative divisions and the spatial information by taking the codes as primary keys of a spatial information table; and the administrative division code is generated simply and contains useful geographic position and range information, so that the administrative division code can be replaced at any time when administrative division change occurs, the real-time property of spatial information organization is ensured, and the stable and real-time association of the administrative division and the spatial information is realized.
2. The invention provides a method for organizing administrative division space information based on a global grid, and also provides description of a zone bit short code of any coordinate point in an administrative division, and the description of any zone bit in the administrative division can be realized through the zone bit short code; through the incidence relation between the zone bit short code and the zone bit spatial information, the spatial information is more finely organized, and the spatial information is favorably finely shared and shared.
Drawings
Fig. 1 is a flowchart of an administrative division space information organization method based on a global grid according to an embodiment of the present invention.
Fig. 2 is a flowchart of an administrative region space information organization method based on a global grid according to another embodiment of the present invention.
Fig. 3 is a schematic diagram of a grid process of an administrative division according to an embodiment of the present invention, where (a) is a schematic diagram of an administrative division boundary, (b) is a schematic diagram of a grid result of the administrative division boundary, and (c) is a schematic diagram of an internal grid of the administrative division.
Fig. 4 is a schematic diagram of a short code grouping process of administrative division zone according to an embodiment of the present invention.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
s101, positioning grid code C of administrative division0。
The geographic position of the administrative division name in GB/T23705-2009 digital urban geographic information public platform place name/address coding rule is represented by the point coordinate of the administrative division government office location, the geographic position of the door (building) address is represented by the point coordinate of the position of the door (building) plate, in order to keep the same with the current national standard, the existing data is better utilized, the position of the government office location is considered to be located in a building under the normal condition, and the positioning point of the administrative division identification code is arranged at the position of the door (building) plate of the government office location.
Setting the used level A of the grid code, and taking the Beidou navigation grid code of the A level grid where the point coordinates of the government office location of the administrative division to be identified are located as the grid code C of the administrative division0；
The Beidou navigation Grid Code is a Beidou Grid Code, called BGC for short, also called Beidou Grid position Code, sometimes called Beidou navigation Grid Code, and is a global area position identification Code researched and developed by the national Beidou system organization. The Beidou grid code and the longitude and latitude code are different in that the longitude and latitude code represents the position of a point by a pair of coordinates, and the Beidou grid code represents an area position by an integer number.
The Beidou grid code is a geosOT geospatial subdivision model which is divided into billions of grids with the size as large as the global space and the size as small as centimeter by adopting a geospatial subdivision model from the top to the periphery of the earth and from the bottom to the center of the earth, and the geospatial subdivision model is composed of 32-level subdivision elements.
Each grid and the network body are full of the whole space, the Beidou grid code is compiled under the 32-level grid division system, and the adopted first level is 1: 100 ten thousand map sheets are divided, a 9-level trellis section score and a trellis code are formed under the map sheets, the code result is the string code, the first level is N32G, 1: the 100 ten thousand map frames are coded by grids, and the 15-digit number represents a grid of a square of one meter on the earth. The 19 digits represent a 1.5 cm grid that is objectively present on the earth, being the coordinates of a region's location.
Table 1 shows the grid sizes of the Beidou navigation grid code at each level, the side length of the seventh layer grid is about 8m near the equator, the Chinese area can reach about 6m, and the precision requirement of building differentiation is met, so that the positioning grid code C of the administrative division identification code013 characters in total are the seventh layer Beidou grid code of a gate (building) plate at the office location of the government.
TABLE 1
S102, selecting an identification grid hierarchical code L of an administrative division:
taking a minimum outsourcing rectangle of the administrative region;
and mapping the minimum outsourcing rectangle of the administrative district into a GeoSOT grid with X rows and Y columns according to a GeoSOT grid subdivision mode, wherein the GeoSOT grid level of the X rows and the Y columns obtained by mapping corresponds to the level A.
And judging that when max (X, Y) >16 is obtained, namely the number of grids corresponding to the larger warp and weft spans is larger than 16, upwards aggregating the grids into the GeoSOT grid of the previous level until max (X, Y) is smaller than or equal to 16, taking the grid of X 'rows multiplied by Y' columns corresponding to the moment as an identification grid set, and taking the corresponding GeoSOT level as an identification grid level code L of the administrative district.
S103, determining a half span code (M) of an administrative division1、M2、N1、N2)。
Positioning the grid number of four boundaries of an upper boundary, a lower boundary, a right boundary and a left boundary of a minimum outsourcing rectangle of an administrative division under an identification grid hierarchical code L level of the administrative division, and respectively marking as M, wherein the grid number is represented by 16-system characters 0-F1、 M2、N1、N2。
S104, an administrative division is a planar space entity, the members, the levels, the boundaries and the administrative center are four basic elements of the administrative division, and the codes are concise and contain as many basic elements as possible on the basis of ensuring uniqueness. According to the above principle, the identification code is generally in the form of a combined code, and is represented by (C) in the invention0、L、M1、 M2、N1、N2) As administrative division coding.
And 2, acquiring attribute information and spatial information of the administrative divisions, and establishing a spatial information table, wherein the spatial information table takes the administrative division codes as primary keys and records the attribute information and the spatial information of the administrative division units.
The administrative division spatial information organization method based on the global grid provided by the embodiment can uniformly identify administrative divisions, establish uniform codes, support all levels of administrative divisions around the world, ensure the correlation between the codes and the geographic positions of the administrative divisions, ensure the uniqueness of the codes, and maintain the association relationship between the administrative divisions and the spatial information by taking the codes as the primary key words of the spatial information table; and the administrative division code is generated simply and contains useful geographic position and range information, so that the administrative division code can be replaced at any time when the administrative division is changed, the real-time property of spatial information organization is ensured, and the stable and real-time association of the administrative division and the spatial information is realized.
step 11, determining a location short code of any coordinate point p in the administrative division; the method specifically comprises the following steps:
s1101, obtaining the boundary of the administrative division, calculating all L-level GeoSOT grids passed by the boundary section by section, and calculating the internal L-level GeoSOT grids among the boundary grids row by row to obtain a layer 1 zone grid set. Fig. 3 shows an example of gridding the administrative division, where (a) is a schematic diagram of the boundary of the administrative division, (b) is a schematic diagram of the result of gridding the boundary of the administrative division, and (c) is a schematic diagram of the internal gridding of the administrative division.
S1102, carrying out row numbering and column numbering on the layer-1 bit grid set, wherein the row numbering and the column numbering are marked by 16-system characters, and the combination of the row numbering and the column numbering of the layer-1 bit grid where the coordinate point p is located is used as a layer-1 bit short code.
S1103, dividing the n-1 layer region grid where the coordinate point p is located by 16 × 16, wherein n is larger than or equal to 2, obtaining the n-layer region grid, the n-layer region grid is the (L +4(n-1)) th-level GeoSOT grid, carrying out 16-system row numbering and column numbering on the n-layer region grid set, and taking the combination of the row numbering and the column numbering of the n-layer region grid where the coordinate point p is located as the n-layer region short code.
And S1104, repeatedly executing S1103 until (L +4(n-1)) < 32 is not established any more, and combining the 1 st zone bit short code to the nth zone bit short code to be used as the zone bit short code of any coordinate point p in the administrative region.
Based on the example given in fig. 3, fig. 4 gives a schematic diagram of the code grouping process of the administrative division region short codes, that is, the L-th grid column where the p point is located in the leftmost grid map is numbered 3, the row number is 7, so the 1 st layer short code is 37, the L-th grid where the p point is located is divided by 16 × 16, and the row number and the column number are performed to obtain an L + 4-th grid, as shown in the middle grid map, the L + 4-th grid column where the p point is located is numbered 3, so the 2 nd layer short code is D3, and the 1 st layer short code is 37D3, and so on, in the rightmost grid map, the combination of the 1 st to 3 rd layer short codes is 37D34A, if (L +4(n-1)) ≦ 32, and n ≦ 3 is true, the division may be continued.
Because the method has the zone bit short code for describing any coordinate point in the administrative division, the step 2 further comprises the following steps:
acquiring spatial information of any coordinate point p in the administrative district, establishing a spatial information additional table, and recording the spatial information of any coordinate point p in the administrative district by taking the administrative district code and the zone bit short code of the coordinate point p as main keywords in the spatial information additional table.
The administrative division spatial information organization method based on the global grid provided by the embodiment provides description of a zone bit short code of any coordinate point in an administrative division, and the description of any zone bit in the administrative division can be realized through the zone bit short code; through the incidence relation between the zone bit short code and the zone bit spatial information, the spatial information is more finely organized, and the spatial information is favorably finely shared and shared.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A method for organizing administrative division space information based on a global grid is characterized by comprising the following steps:
step 1, determining administrative division codes, specifically comprising the following steps:
s101, positioning grid code C of administrative division0；
Setting a used level A of the grid code, and taking a Beidou navigation grid code of a level A grid of point coordinates of a government office location of an administrative division to be identified as a grid code C of the administrative division0；
S102, selecting an identification grid hierarchical code L of the administrative division:
taking the minimum outsourcing rectangle of the administrative region;
the minimum outsourcing rectangle of the administrative region is mapped into a GeoSOT grid with X rows and Y columns according to a GeoSOT grid subdivision mode, and the GeoSOT grid level of the X rows and the Y columns obtained through mapping corresponds to the level A;
when max (X, Y) >16 is judged, the GeoSOT grids are upwards aggregated into the GeoSOT grid of the previous level until max (X, Y) is less than or equal to 16, the grid of the corresponding X 'row multiplied by Y' column at the moment is taken as an identification grid set, and the corresponding GeoSOT level at the moment is taken as an identification grid level code L of the administrative district;
s103, determining a half span code (M) of the administrative division1、M2、N1、N2)；
Positioning the grid number of the upper, lower, right and left boundaries of the minimum outsourcing rectangle of the administrative division under the L level of the identification grid level code of the administrative division, wherein the grid number is represented by 16-system characters 0-F and is respectively marked as M1、M2、N1、N2；
S104, and (C)0、L、M1、M2、N1、N2) Encoding as the administrative division;
step 11, determining a location short code of any coordinate point p in the administrative division; the method specifically comprises the following steps:
s1101, obtaining the boundary of the administrative division, calculating all L-level GeoSOT grids which the boundary passes through section by section, and calculating internal L-level GeoSOT grids among the boundary grids row by row to obtain a 1 st layer of regional grid set;
s1102, carrying out row numbering and column numbering on the layer 1 area grid set, wherein the row numbering and the column numbering are marked by 16-system characters, and the combination of the row numbering and the column numbering of the layer 1 area grid where the coordinate point p is located is used as a layer 1 area short code;
s1103, dividing an n-1 layer region position grid where the coordinate point p is located by 16 x 16, wherein n is larger than or equal to 2, obtaining an n-layer region position grid, the n-layer region position grid is an (L +4(n-1)) th-level GeoSOT grid, carrying out 16-system row numbering and column numbering on an n-layer region position grid set, and taking the combination of the row numbering and the column numbering of the n-layer region position grid where the coordinate point p is located as an n-layer region position short code;
s1104, repeatedly executing S1103 until (L +4(n-1)) < 32 does not hold any more, and then combining the 1 st zone bit short code to the nth zone bit short code to be used as a zone bit short code of any coordinate point p in the administrative district;
step 2, acquiring attribute information and spatial information of the administrative divisions, and establishing a spatial information table, wherein the spatial information table takes the administrative division codes as primary keywords and records the attribute information and the spatial information of administrative division units;
acquiring spatial information of any coordinate point p in the administrative division, and establishing a spatial information additional table, wherein the spatial information additional table takes the administrative division code and the zone bit short code of the coordinate point p as primary keywords, and records the spatial information of any coordinate point p in the administrative division.
2. The method of claim 1, wherein the level a takes a value of 7.
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| CN112015851A (en) * | 2020-11-02 | 2020-12-01 | 中科星图股份有限公司 | Space-time data storage and retrieval method based on Beidou grid code |
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| CN112507051A (en) * | 2020-12-03 | 2021-03-16 | 北京梧桐车联科技有限责任公司 | Administrative division identification method, device, equipment and computer readable storage medium |
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