CN115858713B - Data management method and data management system for agricultural condition geographic information - Google Patents
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Abstract
The invention discloses a data management method and a data management system for agricultural condition geographic information. The method comprises the steps of constructing a main scene of geographic information by acquiring entity objects in first geographic information, constructing a secondary scene of the geographic information by event objects in second geographic information, embedding the secondary scene into the main scene to obtain geographic scene information, and storing the geographic scene information into a first database. And extracting the agricultural condition elements to a second database based on the agricultural condition information. The method comprises the steps that the data base storage separation of agricultural condition elements and geographical scene information is achieved, a data base management module establishes connection between a first data base and a second data base based on a hash table, the agricultural condition elements of the first data base and the agricultural condition elements of the second data base are stored through a public buffer, and an analysis module calls the agricultural condition elements and the geographic elements through the public buffer.
Description
Technical Field
The present invention relates to a management technology of a database, and in particular, to a data management method and a data management system for agricultural condition geographic information.
Background
Agricultural monitoring and geographic information acquisition are data sources of a geochemical analysis platform, are the most widely studied fields of agriculture and geography, and agricultural condition geographic information is high integration of crop data and geographic environment mapping data. The international open geographic information alliance (OGC) discloses a number of network space-time data services and processing service standards so that information of agricultural condition monitoring geospatial data can interoperate based on an integrated platform. The application of agricultural condition geographic information requires that agricultural monitoring data is acquired by inputting or calling sensor data, and geographic information data of corresponding areas is acquired by means of satellite remote sensing, unmanned aerial vehicle mapping, manual mapping and the like.
The effective database management technology is utilized, and is an important basis for guaranteeing application of agricultural condition geographic information. In the prior art, CN102968503B discloses a method for managing a database, which improves the operation management efficiency of the database by constructing a virtual partition of the database. CN103714090B discloses a multi-index database transaction processing method and a database, which proposes a method for improving the underlying operation and working logic of the database by using indexes. Since the agricultural condition monitoring data generally has dynamic variability, the corresponding storage database needs to ensure instant consistency in an independent mode, the geographic mapping data needs to ensure that the geographic mapping data maintains instant consistency in the independent mode, and the data management method in the prior art is not suitable for the application environment. Accordingly, there is a need for further improvements in the art.
Disclosure of Invention
Aiming at the problems, the invention provides a data management method of agricultural condition geographic information. The method is used for effectively configuring management of two different databases, by storing geographic scene information in a first database and agricultural condition elements in a second database, traversing related agricultural condition element identifications by taking the geographic elements forming the geographic scene information as indexes, and constructing links of the first database and the second database in a public buffer area. Furthermore, the invention also provides a data management system according to the agricultural condition geographic information data management method.
The aim of the invention can be achieved by the following technical means:
a data management method of agricultural condition geographic information comprises the following steps:
step 1: inputting the first geographic information into a GIS module, and extracting different entity objects in the first geographic information based on the first characteristics, wherein any entity object comprises at least one geographic element;
step 2: converting the geographic elements into vector geographic data, grouping a plurality of entity objects, and constructing a main scene based on any group of entity objects;
step 3: the GIS module receives the second geographic information, extracts different event objects in the second geographic information based on the geographic elements, and divides the second geographic information into a plurality of sub-scenes;
step 4: embedding the secondary scene into the primary scene to obtain geographic scene information, storing the geographic scene information into a first database, and generating an index according to geographic elements;
step 5: the ASD module receives the agricultural condition information, generates a plurality of agricultural condition elements based on the second characteristics, stores the agricultural condition elements in a second database, and any agricultural condition element comprises an identifier;
step 6: the database management module generates a hash table based on the index matching identifier, wherein the hash table comprises a plurality of linked lists for associating the first database with the second database;
step 7: traversing at least one linked list in the database management module, if the agricultural condition element is linked with the geographical scene information linked list, entering a step 8, otherwise, entering a step 6;
step 8: storing the agricultural condition elements and the geographic elements corresponding to the linked list into a public buffer area of a database management module;
step 9: the database management module opens API rights, and the analysis module calls agricultural condition elements and geographic elements through the public buffer area.
In the invention, the first geographic information is the satellite telemetry data with unified elevation reference, and the second geographic information is the geographic data obtained by mapping based on the GIS technology in different agricultural areas, and at least comprises a three-dimensional model, an elevation model and a positive photographic image.
In the present invention, the geographic elements are geological conditions, topographic conditions, and hydrologic conditions in the first geographic information.
In the present invention, agricultural condition elements include soil data, crop data, biological resource data, and disaster data.
In the invention, a main scene is telemetry image data containing geographic elements, a secondary scene is real scene image data of geographic surveying and mapping, and at least one secondary scene is embedded into the main scene according to the spatial topological relation among scene objects.
In the invention, the spatial topological relation comprises an adjacent relation, an incidence relation, an inclusion relation and a communication relation between the secondary scenes, the main scene and between the main scene and the secondary scene.
In the present invention, the geographic elements constitute a plurality of relational nodes N i I=1, 2,3, …, n, the second database holds a database table D of agricultural condition elements i I=1, 2,3, …, n, database table D i Pair relation node N i Broadcasting and recording all relation nodes N through concurrency i Hash values of all the partitions are arranged into the hash table according to the relation node sequence.
In the invention, the secondary scenes form a random queue in the process of embedding the secondary scenes into the main scenes, and if the main scenes of any secondary scenes do not exist in the random queue, the main scenes are added into the random queue from the tail of the queue.
A data management system for realizing a data management method of agricultural condition geographic information comprises a GIS module, an ASD module, a database management module, a first database, a second database and an analysis module,
the GIS module is used for extracting entity objects of different categories in the first geographic information and event objects of different categories in the second geographic information, obtaining a plurality of secondary scenes based on geographic elements, and obtaining geographic scene information based on the secondary scenes and a geographic father scene;
the ASD module is used for receiving the agricultural condition information and generating a plurality of agricultural condition elements based on the second characteristics;
the database management module is used for constructing a public buffer area of the first database and the second database, and establishing a linked list containing a unique relation based on the index of the first database and the identifier of the second database;
the first database is a No SQL graphic database and is used for storing geographic scene information;
the second database is a My SQL database and is used for storing agricultural condition elements;
the analysis module is any terminal equipment with the authority of the database management module API.
The data management method and the data management system for the agricultural condition geographic information have the beneficial effects that: the invention stores the agricultural condition information and the geographic information into separate and different databases by respectively extracting the agricultural condition information and the geographic information. Compared with the prior art, the method has the advantages that the integration degree of the agricultural condition information and the geographic information is higher, the agricultural condition information can be quickly read in a specific geographic scene, the conflict problem of agricultural condition geographic information cloud database calling is reduced, and the server cost of storing the agricultural condition geographic information by a traditional single database is effectively reduced. The data caching pressure of the database is smaller, the accuracy and efficiency of calling the agricultural condition geographic information are effectively improved, and the remote platform or the system is beneficial to calling the agricultural condition geographic information more efficiently.
Drawings
FIG. 1 is a flow chart of a method for managing data of agricultural condition geographic information according to the present invention;
FIG. 2 is a diagram of an exemplary format of a standard database of agricultural geographic information according to the present invention;
FIG. 3 is a schematic diagram of a tree structure generated by identifiers in an agricultural element in a second database according to the present invention;
FIG. 4 is a schematic diagram of a link table connection between a geographical element and an agricultural condition element in a public buffer of a data management module according to the present invention;
fig. 5 is a hardware block diagram of a data management system for implementing a data management method for agricultural geographic information according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The geographic scene is a complex formed by different elements such as soil and water, air, biology, human activities and the like under different time scales, and the geographic scene information is widely applied to the fields of geochemical analysis and agricultural condition monitoring. The geographical elements related to the agricultural condition geographical information are wider, the traditional geographical data storage method is generally carried out in a layered and classified mode, geographical data is used as a father table, agricultural condition monitoring data is used as a child table, the database storage mode is more focused on the geometric, position, thematic and time attributes of the geographical elements, and the geographical scene related to the agricultural data cannot be effectively described. In addition, the geographic entity has higher space property and samplings, geographic data is generally obtained through telemetry data or geographic mapping, the geographic entity also has mass property and uncertainty, the form of the geographic entity in the database also has unstructured characteristics, and the corresponding topology, azimuth, distance and space structure have larger variability.
According to the invention, the Neo4j database in the No SQL database class is selected to store the geographic information, the My SQL database is selected as the storage of the agricultural condition monitoring information, the link between the geographic element and the agricultural condition element is constructed, the embedding of any one scene into the main scene is ensured, and any one agricultural condition element is associated with the secondary scene for data call in the related application field. The geographic information stored in the Neo4j database is three types of entity objects, scene objects and event objects, the entity objects are divided into a plurality of geographic elements, the scene objects comprise secondary scenes and main scenes, the event objects are cases that the geographic elements participate in and influence related scenes, the event objects are instances of changing in a time period, and in the embodiment, the event objects are instance results obtained by associating the geographic elements with agricultural elements. In addition, the elements related to the invention are data values, the scene is a telemetered or mapped image, and the image is stored in a binary stream data form.
Example 1
Referring to fig. 1, a flowchart of a data management method for agricultural condition geographic information detailed in this embodiment includes the following steps:
pretreatment: and selecting an agricultural condition geographic information analysis object area, defining a boundary value of the object area, calling telemetry data in the object area based on a USGS satellite group telemetry system, generating first geographic information, and preprocessing the first geographic information. The first geographic information is unified elevation reference satellite telemetry data, space radar topographic mapping information (SRTM) is acquired based on a USGS satellite group telemetry system, and the acquired spectral image data is generated through the selected elevation reference scale 72.260 m.
This pretreatment step is an additional preferred step. Through the transformation and adjustment of the data, the consistency processing is completed before the GIS module processing, so that the processing efficiency of the GIS module can be improved, and the operation pressure of the GIS module can be reduced. The first geographic information preprocessing method comprises the steps of coordinate system unification and projection change. The first geographic information acquired based on the SRTM is a geodetic coordinate system, and the geodetic coordinate system is converted into a space rectangular coordinate system. The geodetic coordinates of any point are: (R, H, L), the corresponding space rectangular coordinates are (X) 1 ,Y 1 ,Z 1 )，X 1 =(F+L)cosRcosH，Y 1 =(F+L)cosRsinH，Z 1 =[F(1-e 2 )+L]sinR, wherein,
，/>
a is the length of an ellipsoidal major half axis of the geodetic coordinate system, and b is the length of a minor half axis of the ellipsoidal under the geodetic coordinate system. The projection transformation converts the geographic data on the ellipsoid into the geographic data on the two-dimensional platform, and converts the ellipsoid coordinates into geographic data formed by plane rectangular coordinates based on a Gaussian projection method.
Step 1: inputting the first geographic information into a GIS module, and extracting entity objects of different categories in the first geographic information based on the first characteristics, wherein any entity object comprises at least one geographic element, and the geographic element is a geological condition, a topographic condition and a hydrologic condition in the reference geographic information. The first features include geological features, topographical features, and hydrologic features.
In order to quickly acquire the terrain condition, in the embodiment, after gray processing is performed on the first geographic information, a terrain feature operator is selected to obtain a geographic element, and the terrain feature operator extracts gray change conditions of the first geographic information based on the square sum of the difference values of the sliding window and the original window. Preferably, the sliding window size is 3×3, 5×5, or 8×8, and the calculation amount corresponding to the larger sliding window size increases, and in this embodiment, the sliding window size n is 3×3. Gray scale variation value
Wherein i is the number of any pixel in the selected sliding window size n, x i Is the gray value, y of the ith pixel point in the original window i For the gray value of the ith pixel point in the sliding window, solving the minimum value C of gray change in any direction min Setting a threshold T as a criterion for the terrain condition, if C min T is less than or equal to the height of the reference surface, if C min And the point is greater than the topography of the height of the reference surface.
Step 2: and converting the geographic elements into vector geographic data, detecting and grouping the entity objects according to semantic rules, and constructing a main scene by any group of entity objects.
In order to improve the efficiency of data storage and reading, the vector geographic data of the embodiment includes attribute data, a spatial data file and an index object file. The attribute data file is a dbf file, a standard database file is formed, and basic attribute information of any piece of data is recorded; the space data file is shp type file, which comprises a database file header, a data recording header and actual data records with recording sequence. The index object file is shx class file, which is used for searching or calling standard database file in the database. The database file header is composed of data with fixed length, the data recording sequence starts from the data recording header with 8Kb, and the basic information of the actual data is recorded. Referring to fig. 2, the standard database format of an agricultural condition geographic information in this embodiment includes unique identification codes, spatial data shapes, length sizes, width sizes, and type identifications.
Step 3: the GIS module (geographic information system module) receives second geographic information, extracts event objects of different categories in the second geographic information based on geographic elements, divides the second geographic information into a plurality of sub-scenes, and the second geographic information is geographic data obtained by mapping based on GIS technology in different agricultural areas and at least comprises a three-dimensional model, an elevation model and a positive photographic image.
Step 4: the secondary scene is embedded into the primary scene to obtain geographic scene information, the geographic scene information is stored in a first database, and an index is generated based on a geographic element.
In this embodiment, a parent-child inclusion relationship exists between a primary scene and a secondary scene, the primary scene is telemetry image data including geographic elements, the secondary scene is real image data of geographic surveying and mapping exploration, and the primary scene and the secondary scene are adjacent relationships, association relationships, inclusion relationships and communication relationships between the secondary scene and the secondary scene, between the primary scene and the primary scene, and between the primary scene and the secondary scene.
In this embodiment, the primary scene is a geographic image of a specific category, the corresponding secondary scene is a geographic image included in the category corresponding to the primary scene, the secondary scenes form a random queue, the secondary scenes are embedded into the primary scene, any primary scene includes a plurality of secondary scenes, an initial queue head of the primary scene is set, and if the primary scene of any primary scene does not exist in the queue, the primary scene is added into a random sequence from the end of the termination queue.
Step 5: the ASD module (agricultural condition geographic system module) receives agricultural condition information, generates a plurality of agricultural condition elements based on the second characteristics, and stores the agricultural condition elements in a second database, wherein any agricultural condition element comprises an identifier. The agricultural condition elements are soil data, crop data, biological resource data and disaster data in agricultural condition information.
In this embodiment, the second characteristic comprises an environmental characteristic, a crop characteristic, a natural characteristic. The agricultural condition elements obtained by the environmental characteristics comprise biological resource data and soil data, the agricultural condition elements obtained by the crop characteristics are crop data, and the agricultural condition elements obtained by the natural characteristics are disaster data.
In this embodiment, referring to fig. 3, the identifier is a physical number generated on a geographic element, and the physical number of any geographic element is obtained by SQL statement transformation. The 0×0011 identifier is a self-balancing binary tree of crop data, and the corresponding 0×0022 and 0×0055 are subclasses of the crop data, and correspond to the crop state index and normalized crop index in the crop data.
Step 6: the database management module generates a hash table based on the index matching identifier, wherein the hash table comprises at least one linked list connected with the first database and the second database, and the linked list is stored to the new partition in a key value connection mode.
In the present embodiment, in the first database, the geographic elements constitute a plurality of relational nodes, denoted as N i I=1, 2,3, …, n, the second database holds database tables of agricultural condition elements recorded as table D i I=1, 2,3, …, n. In the database management module, database table D i Pair relation node N i Broadcast and concurrent record relation node N i The hash values are arranged into a hash table according to the relation node sequence.
In this embodiment, the database management module establishes a public buffer area of the first database and the second database, and when an external access request exists in the public buffer area, extracts a connection key recorded in the public buffer area, and establishes connection between the first database and the second database to obtain at least one linked list.
Step 7: referring to fig. 4, the common buffer area includes a plurality of different partitions, and the geographic elements and the agricultural elements are connected through a linked list. When the database management module traverses at least one linked list, if the linked list information contains a connection key recorded in the public buffer zone, the fact that the agricultural condition element is linked with the geographical scene information linked list is explained, and step 8 is entered; if the linked list information does not contain the connection key recorded in the public buffer area, the step 6 is entered.
Step 8: and storing the agricultural condition elements and the geographic elements corresponding to the linked list into a public buffer area of the database management module.
In this embodiment, the database management module constructs at least 16 independent shard_, and the database table D is formed by any one agricultural condition element i Or a relation node N formed by any geographic element i And when the public buffer area is entered, mapping the public buffer area into the corresponding Suard_and buffering and storing the agricultural condition elements and the geographic elements.
Step 9: the database management module opens API (application programming interface) rights for the geography analysis platform, the geography analysis platform is accessed into the database management module, and the analysis module calls the agricultural condition elements and the geographic elements through the public buffer area.
In this embodiment, the ground science analysis platform initiates a request message, the analysis module analyzes the request, creates a plurality of fragments corresponding to the data source (agricultural condition element, geographic element) based on the request message, constructs an iterator according to the combination of the fragments, sends the data types and the time lines generated in the iterator to the ground science analysis platform in a feedback mode, and creates a connection instance based on the HTTP protocol after the related data points in the iterator are processed in a serialization mode. Further, the data instances created by the iterators individually form data nodes, and the remote iterators and the local iterators have the same interface.
Example two
The embodiment details a data management system of a data management method of agricultural condition geographic information, referring to fig. 5, the management system includes a GIS module, an ASD module, a database management module, a first database, a second database, and an analysis module, wherein basic connection of different modules forms a system and related functions thereof as follows:
the GIS module is used for extracting entity objects of different categories in the first geographic information and event objects of different categories in the second geographic information, obtaining a plurality of secondary scenes based on geographic elements, obtaining geographic scene information based on the secondary scenes and the geographic father scenes, and carrying out unidirectional data exchange with the first database. The ASD module is used for receiving the agricultural condition information and generating a plurality of agricultural condition elements based on the second characteristics, and the ASD module performs unidirectional data exchange with the second database. The database management module is used for constructing a public buffer area of the first database and the second database, storing the buffer information of the geographical elements of the first database and the agricultural elements of the second database, establishing a linked list containing unique relations based on the index of the first database and the identifier of the second database, and carrying out bidirectional data exchange with the first database and the second database. The first database is a No SQL graphic database, and is used for storing geographic scene information and establishing association relations among entity objects, geographic scene information and event objects based on the geographic scene information. The second database is a MySQL database and is used for storing the agricultural condition elements and establishing a database table based on the agricultural condition elements. The analysis module is any terminal equipment with the authority of the database management module API. The analysis module calls the agricultural condition elements and the geographic elements through the public buffer area.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (7)
1. The data management method of the agricultural condition geographic information is characterized by comprising the following steps of:
pretreatment: selecting an agricultural condition geographic information analysis object area, calling telemetry data in the object area, generating first geographic information, and converting a geodetic coordinate system of the first geographic information into a space rectangular coordinate system;
step 1: inputting first geographic information into a GIS module, and extracting different entity objects in the first geographic information based on first characteristics, wherein any entity object comprises at least one geographic element, and the first geographic information is unified satellite telemetry data of an elevation reference;
step 2: converting the geographic elements into vector geographic data, grouping a plurality of entity objects, and constructing a main scene based on any group of entity objects;
step 3: the GIS module receives second geographic information, extracts different event objects in the second geographic information based on geographic elements, and divides the second geographic information into a plurality of secondary scenes, wherein the second geographic information is geographic data obtained by mapping based on GIS technology in different agricultural areas, and at least comprises a three-dimensional model, an elevation model and a positive photographic image;
step 4: the method comprises the steps that a main scene is telemetering image data containing geographic elements, a secondary scene is real-scene image data of geographic surveying and mapping, at least one secondary scene is embedded into the main scene according to a space topological relation among scene objects to obtain geographic scene information, the geographic scene information is stored in a first database, an index is generated according to the geographic elements, and the first database is a No SQL graphic database;
step 5: the ASD module receives the agricultural condition information, generates a plurality of agricultural condition elements based on the second characteristics, and stores the agricultural condition elements in a second database, wherein any agricultural condition element comprises an identifier, and the second database is a MySQL database;
step 6: the database management module generates a hash table based on the index matching identifier, wherein the hash table comprises a plurality of linked lists for associating the first database with the second database;
step 7: traversing at least one linked list in the database management module, if the agricultural condition element is linked with the geographical scene information linked list, entering a step 8, otherwise, entering a step 6;
step 8: storing agricultural condition elements and geographic elements corresponding to a linked list into a public buffer area of a database management module, wherein the linked list is stored into a new partition in a key value connection mode;
step 9: the database management module opens API authority, the analysis module calls agricultural condition elements and geographic elements through the public buffer,
in step 1, gray scale processing is performed on the first geographic information, a geographic feature operator is selected to obtain geographic elements, gray scale change conditions of the first geographic information are extracted based on the square sum of difference values of the sliding window and the original window, and gray scale change values are extracted
Wherein i is the number of any pixel in the size n of the selected sliding window, and x is the number of the pixel i Is as the originGray value, y of ith pixel point in window i Solving the minimum value C of gray level change in any direction for gray level value of ith pixel point in sliding window min Setting a threshold T as a criterion for the terrain condition, if C min T is less than or equal to the height of the reference surface, if C min And is a local extremum, then the point is a terrain greater than the reference level height,
in step 6, the database management module establishes a public buffer area of the first database and the second database, and when an external access request exists in the public buffer area, extracts a connection key recorded in the public buffer area, and establishes connection between the first database and the second database to obtain at least one linked list.
2. The method for managing agricultural condition geographical information according to claim 1, wherein the geographical elements are geological conditions, topographic conditions, and hydrologic conditions in the first geographical information.
3. The method for managing agricultural condition geographical information according to claim 1, wherein the agricultural condition elements include soil data, crop data, biological resource data, disaster data.
4. The method for managing data of agricultural geographic information according to claim 1, wherein the spatial topological relation comprises an adjacency relation, an association relation, an inclusion relation and a communication relation between the secondary scene and the secondary scene, between the primary scene and the primary scene, and between the primary scene and the secondary scene.
5. The method for managing agricultural geographic information according to claim 1, wherein the geographic elements constitute a plurality of relational nodes N i I=1, 2,3, …, n, the second database holds a database table D of agricultural condition elements i I=1, 2,3, …, n, database table D i Pair relation node N i Broadcasting and recording all relation nodes N through concurrency i The hash value at each partition is calculated,the hash values are arranged into the hash table according to the relation node sequence.
6. The method for managing agricultural geographic information according to claim 1, wherein the secondary scenes form a random queue in the process of embedding the secondary scenes into the primary scenes, and if the primary scenes of any secondary scenes do not exist in the random queue, the primary scenes are added into the random queue from the tail of the queue.
7. A data management system for realizing the data management method of agricultural condition geographic information according to claim 1, which is characterized by comprising a GIS module, an ASD module, a database management module, a first database, a second database and an analysis module,
the GIS module is used for extracting entity objects of different categories in the first geographic information and event objects of different categories in the second geographic information, obtaining a plurality of secondary scenes based on geographic elements, and obtaining geographic scene information based on the secondary scenes and a geographic father scene;
the ASD module is used for receiving the agricultural condition information and generating a plurality of agricultural condition elements based on the second characteristics;
the database management module is used for constructing a public buffer area of the first database and the second database, and establishing a linked list containing a unique relation based on the index of the first database and the identifier of the second database;
the first database is a No SQL graphic database and is used for storing geographic scene information;
the second database is a My SQL database and is used for storing agricultural condition elements;
the analysis module is any terminal equipment with the authority of the database management module API.
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