CN110032613B - Spatio-temporal data integrated management method based on chained storage - Google Patents
Spatio-temporal data integrated management method based on chained storage Download PDFInfo
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Abstract
The invention discloses a spatio-temporal data integrated management method based on chain storage, which comprises the following steps: analyzing original data, creating a chain storage structure comprising four fields of GUID, Time, OldGUID and Status, establishing a chain relation among space-Time data elements of different temporal versions by adopting the chain storage structure, and forming a space-Time data chain; element updating and space-time data link updating in the space-time data layer are completed by selecting the layer to be updated, setting an updating range, updating space-time data elements and the current state and global unique identification thereof; and performing integrated management on the space-time data by using the updated space-time data link. The remarkable effects are as follows: the time-space data chain is formed based on chain storage, only updated data need to be stored when time-space data management is carried out, redundancy caused by repeated storage of data of different versions is obviously reduced, and efficiency of element time-space tracing query is improved.
Description
Technical Field
The invention relates to the technical field of geospatial information data processing, in particular to a spatiotemporal data integrated management method based on chain storage.
Background
The management of the spatiotemporal data is always a difficult problem in the field of geographic spatial information application, at present, mainstream GIS platforms such as ArcGIS and hypergraph are mainly adopted to establish a plurality of temporal versions to manage spatiotemporal data with different time dimensions, the management mode is that each version needs to store the full data of the version, so that a large amount of data redundancy is caused, meanwhile, the data updating efficiency is low, the updating period is long, and in addition, because the data is updated only after being edited simply during data updating, the association relationship between the updating elements and the original elements is not established, so that the element-level spatiotemporal tracing query cannot be realized.
With the implementation of national strategy, geographic information databases in different application fields are built more and more, and the huge value of geographic information is difficult to be effectively played without a feasible space-time data management method.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a spatiotemporal data integrated management method based on chain storage.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a spatiotemporal data integration management method based on chain storage is characterized by comprising the following steps:
step 1: analyzing original data, creating a chain type storage structure, establishing a chain type relation between time-space data elements of different temporal versions by adopting the chain type storage structure, and forming a time-space data chain;
the chain storage structure comprises four fields of GUID, Time, OldGUID and Status, wherein the GUID field is used for storing the global unique identification of the current state of the space-Time data element, the Time field is used for storing the Time of adding, deleting and editing the space-Time data element, the OldGUID field is used for storing the global unique identification of the previous state of the space-Time data element, and the Status field is used for storing the current state of the space-Time data element;
step 2: element updating and space-time data link updating in the space-time data layer are completed by selecting the layer to be updated, setting an updating range, updating space-time data elements and the current state and global unique identification thereof;
and step 3: and performing integrated management on the space-time data by using the updated space-time data link.
Further, the Status field includes three Status values, namely new, deleted and modified, which respectively indicate three statuses of addition, deletion and change.
Further, the space-time data link is a chain relation of space-time data elements of different temporal versions established by the GUID field and the OldGUID field.
Further, spatiotemporal tracing between spatiotemporal data elements of different temporal versions is performed through the GUID field and the globally unique identifier stored in the OldGUID field.
Further, the element updating step in the spatio-temporal data layer is as follows:
s1: selecting a data layer to be updated, and loading the data layer to be updated on a map for display;
s2: drawing a self-defined updating range on a map, and extracting the current version elements in the data map layer to be updated according to the updating range;
s3: checking whether the current version elements have the chain type storage structure, if so, entering a step S4, otherwise, establishing the chain type relation of the current version elements by adopting the chain type storage structure, and then entering a step S4;
s4: generating a temporary layer to store elements to be updated, updating the elements by adding the elements, deleting the elements and editing the elements, and updating the current state and the global unique identifier corresponding to the elements;
s5: extracting updated elements in the temporary layer, updating the current state of the original elements corresponding to the OldGUID fields of the updated elements, generating the GUID fields of the updated elements at the same time, and writing the GUID fields into the original layer;
s6: and after all the elements are written, deleting the temporary layer to finish the updating of the elements in the space-time data layer.
Further, in step S4, the added element is used to complete the editing of the added point, the added line, the added face, the added attribute field and the attribute field value, and after completing the addition of the element, the added time of the element is stored in the chain storage structure, and the current state of the added element is updated.
Further, the deleting element is used for realizing single deletion or batch deletion of the elements, storing the deleting time of the elements in the chained storage structure after the elements are deleted, and updating the global unique identifier and the current state of the deleted elements.
Furthermore, the editing element is used for realizing the addition of nodes, the deletion of nodes, the adjustment of the spatial position of the point location, the addition of attribute fields, the deletion of attribute fields and the editing of attribute field values, storing the modification time of the element in a chain storage structure after the element is edited, and updating the global unique identifier and the current state of the deleted element.
Furthermore, the integrated management of the spatiotemporal data comprises establishing a current version data layer, establishing a spatiotemporal increment data layer, establishing a time sequence data layer and spatiotemporal tracing based on elements.
Further, the process of establishing the data map layer of the present version comprises: based on Status fields in the chain type storage structure, extracting all elements with state values being new or null values according to the state values of all elements to obtain a current version data layer;
the establishing process of the space-time increment data map layer is as follows: based on a Time field in a chain type storage structure, obtaining incremental data of a plurality of temporal version space-Time data according to Time values stored in the Time field, and extracting all elements with newly increased or changed state values in the incremental data to obtain a space-Time incremental data map layer;
the establishing process of the time sequence data layer is as follows: and extracting all elements of which the Time values are smaller than the designated Time value timeM and the state values are new or vacant according to the Time field and the designated Time value timeM in the chained storage structure, and then integrating the space-Time increment data of which the Time value is timeM to establish a Time sequence data layer of the timeM.
The time-space tracing process based on elements comprises the following steps: based on the GUID field and the OldGUID field in the chain storage structure, iterative query is performed according to the GUID field of the specified element to obtain the initial element of the specified element, namely, element-based space-time tracing is realized.
The method is different from the consistency of common space-Time data elements of different versions identified by the same code, adopts a chain storage structure comprising four fields of GUID, Time, OldGUID and Status to establish the relation between the space-Time data elements of different versions, simultaneously forms a space-Time data chain, and performs updating operations of adding, deleting, editing and the like of the elements based on the chain storage structure, thereby realizing the integrated management of the space-Time data such as establishing a current version data layer, establishing a space-Time increment data layer, establishing a Time sequence data layer and space-Time tracing based on the elements.
The invention has the following remarkable effects:
1) reduce the cost
When the space-time data management is carried out, only the updated data needs to be stored, so that the redundancy caused by repeated storage of data of different versions can be obviously reduced, the data volume is greatly reduced, and the user cost is saved.
2) Improve the efficiency
Based on chain storage, the invention can establish the time-space relationship of elements of different time versions through simple query of two fields, thereby saving time sequencing overhead and improving the efficiency of time-space tracing query of the elements.
3) Easy to use
The space-time element updating method and the space-time data management method provided by the invention can realize the integrated management of the space-time data, only four fields are added to the original data, a new software platform is not required, and the method has the characteristics of simple principle, light weight, easy operation and the like.
4) Wide application range
The invention is not only suitable for the management of the spatio-temporal data, but also can be popularized and used in other scenes needing to manage historical data. Meanwhile, the method for performing space-time data management by adopting space-time element updating and space-time data management can be expanded to different GIS platforms, browsers, mobile terminals and other different terminals.
Drawings
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a schematic diagram of a spatiotemporal data structure based on chained storage;
FIG. 3 is a flow chart of spatiotemporal data element updates;
FIG. 4 is a schematic diagram of a process for establishing a data layer of a current version;
FIG. 5 is a schematic diagram of the process of building the spatio-temporal incremental data layers;
FIG. 6 is a schematic diagram of a process for creating time-series data layers.
Detailed Description
The following provides a more detailed description of the embodiments and the operation of the present invention with reference to the accompanying drawings.
As shown in fig. 1, a spatiotemporal data integrated management method based on chain storage specifically includes the following steps:
step 1: analyzing original data, creating a chain type storage structure, establishing a chain type relation between time-space data elements of different temporal versions by adopting the chain type storage structure, and forming a time-space data chain;
as shown in fig. 2, the chained storage structure includes four fields of GUID, Time, OldGUID, and Status, where the GUID field is used to store a globally unique identifier of a current temporal state of the spatiotemporal data element, the Time field is used to store a Time when the spatiotemporal data element is added, deleted, or edited, the OldGUID field is used to store a globally unique identifier of a previous temporal state of the spatiotemporal data element, and the Status field is used to store a current state of the spatiotemporal data element;
the Status field is composed of new, deleted and modified state values, and the new, deleted and modified state values respectively represent three states of adding, deleting and changing.
The chain storage structure establishes chain relations of different temporal versions of the spatiotemporal data elements through the GUID field and the OldGUID field to form a spatiotemporal data chain.
Step 2: element updating and spatio-temporal data link updating in the spatio-temporal data layer are completed by selecting the layer to be updated, setting an updating range, updating spatio-temporal data elements and the current state and the global unique identifier thereof, as shown in fig. 3, the specific updating steps are as follows:
s1: selecting a data layer to be updated, and loading the data layer to be updated on a map for display;
s2: drawing a self-defined updating range on a map, and extracting the current version elements in the data map layer to be updated according to the updating range;
s3: checking whether the current version elements have the chain type storage structure, if so, entering a step S4, otherwise, establishing the chain type relation of the current version elements by adopting the chain type storage structure, and then entering a step S4;
s4: generating a temporary layer Temp to store elements to be updated, updating the elements by adding the elements, deleting the elements and editing the elements, and updating the current state and the global unique identifier corresponding to the elements at the same time, wherein the specific process comprises the following steps:
newly adding elements: the method comprises the steps of adding points, lines, faces, attributes, fields and fields, editing the attributes and fields, completing adding of point elements, line elements or face elements by adding elements, storing adding Time of the elements into a Time field in a chain type storage structure after adding is completed, and setting a state value of a Status field as new (adding).
Deleting elements: the method comprises single deletion, batch deletion and the like, wherein after the elements are deleted by deleting the elements, the deleting Time of the elements is stored into a Time field in a chain storage structure, the Time value of a GUID field is written into an OldGUID field, and meanwhile, the state value of a Status field is set to be deleted (namely deleted).
Editing elements: the method comprises the steps of adding nodes, deleting nodes, adjusting the space position of the point position, adding attribute fields, deleting the attribute fields, editing the field values of the attribute fields and the like, after element editing is completed, storing the modification Time of the elements in a chain storage structure into a Time field, writing the Time value of a GUID field into an OldGUID field, and setting the state value of a Status field to be new (namely adding).
S5: extracting updated elements in the temporary layer Temp, generating GUID fields by using elements with Status fields of new and deleted in the chain storage structure, writing the GUID fields into the original data layer, searching elements with the GUID fields consistent with the OldGUID fields of the extracted updated elements in the original data layer, and marking the state values of the Status fields as modified;
s6: and deleting the temporary layer Temp after all the elements are written, and finishing the updating of the elements in the space-time data layer.
And step 3: and performing integrated management of spatio-temporal data including establishing a current version data layer, establishing a spatio-temporal increment data layer, establishing a time sequence data layer, and spatio-temporal tracing based on elements by using the updated spatio-temporal data link, wherein:
referring to fig. 4, the process of establishing the data map layer of the current version includes: based on the Status field in the chain type storage structure, extracting all elements with the Status values of ' new ' or null ' in the Status field according to the Status values of all elements, and then establishing a current version data layer;
referring to fig. 5, the process of establishing the spatio-temporal incremental data map layer is as follows: based on a Time field in a chain type storage structure, if Time values such as t1, t2 and t3 … tn … exist in the Time field, incremental data of a plurality of temporal version space-Time data such as temp1, temp2 and temp3 … tempN … are obtained according to the Time values stored in the Time field, all elements of which the state values of the Status field in the incremental data are 'new' or 'modified' are extracted, and a space-Time incremental data layer is obtained;
referring to fig. 6, the process of establishing the time-series data layers is as follows: according to the Time field and the designated Time value timeM in the chained storage structure, all Time values stored in the Time field are extracted to be smaller than the designated Time value timeM and all elements with state values of ' new ' or null ' in the Status field are extracted, and then space-Time increment data with the Time value of timeM is fused, so that a Time sequence data layer of the timeM can be established.
The time-space tracing process based on elements comprises the following steps: based on the GUID field in the chain storage structure and the global unique identification stored in the OldGUID field, iterative query is carried out according to the GUID field of the specified element to obtain the initial element of the specified element, and the time-space tracing based on the element can be realized.
The method is different from the consistency of common Time-space data elements of different versions identified by the same code, the relation between the Time-space data elements of different versions is established by adopting a chain storage structure comprising four fields of GUID, Time, OldGUID and Status, only four fields are added to the original data, the Time-space relation of the Time-space data elements of different versions can be established by simply inquiring the two fields, the Time sequencing cost is saved, and the efficiency of Time-space tracing inquiry of the elements can be improved; meanwhile, a time-space data link is formed, updating operations such as addition, deletion and editing of elements are carried out based on a chain type storage structure, a new software platform is not needed, integrated management of building a current version data layer, building a time-space increment data layer, building a time sequence data layer and time-space tracing of the time-space data based on the elements can be achieved, and when the time-space data management is carried out, only the updating data needs to be stored, so that redundancy caused by repeated storage of different version data can be remarkably reduced, the data volume is greatly reduced, and the user cost is saved.
The technical solution provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (7)
1. A spatiotemporal data integration management method based on chain storage is characterized by comprising the following steps:
step 1: analyzing original data, creating a chain type storage structure, establishing a chain type relation between time-space data elements of different temporal versions by adopting the chain type storage structure, and forming a time-space data chain;
the chain storage structure comprises four fields of GUID, Time, OldGUID and Status, wherein the GUID field is used for storing the global unique identification of the current state of the space-Time data element, the Time field is used for storing the Time of adding, deleting and editing the space-Time data element, the OldGUID field is used for storing the global unique identification of the previous state of the space-Time data element, and the Status field is used for storing the current state of the space-Time data element;
step 2: element updating and space-time data link updating in the space-time data layer are completed by selecting the layer to be updated, setting an updating range, updating space-time data elements and the current state and global unique identification thereof;
the element updating step in the space-time data layer comprises the following steps:
s1: selecting a data layer to be updated, and loading the data layer to be updated on a map for display;
s2: drawing a self-defined updating range on a map, and extracting the current version elements in the data map layer to be updated according to the updating range;
s3: checking whether the current version elements have the chain type storage structure, if so, entering a step S4, otherwise, establishing the chain type relation of the current version elements by adopting the chain type storage structure, and then entering a step S4;
s4: generating a temporary layer to store elements to be updated, updating the elements through newly adding the elements, deleting the elements and editing the elements, and updating the current state and the global unique identifier corresponding to the elements to be updated;
s5: extracting updated elements in the temporary layer, updating the current state of the original elements corresponding to the OldGUID fields of the updated elements, generating the GUID fields of the updated elements at the same time, and writing the GUID fields into the original layer;
s6: after all the elements are written, deleting the temporary layer to finish the updating of the elements in the space-time data layer;
and step 3: performing integrated management on the space-time data by using the updated space-time data link;
the integrated management of the time-space data comprises the steps of establishing a present version data layer, establishing a time-space increment data layer, establishing a time sequence data layer and time-space tracing based on elements;
the establishment process of the data map layer of the current version is as follows: based on Status fields in the chain type storage structure, extracting all elements with state values being new or null values according to the state values of all elements to obtain a current version data layer;
the establishing process of the space-time increment data map layer is as follows: based on a Time field in a chain type storage structure, obtaining incremental data of a plurality of temporal version space-Time data according to Time values stored in the Time field, extracting all elements of which the state values are newly increased or changed in the incremental data, and obtaining a space-Time incremental data layer;
the establishing process of the time sequence data layer is as follows: extracting all elements of which the Time values are smaller than the designated Time value timeM and the state values are new or vacant according to the Time field and the designated Time value timeM in the chained storage structure, and then integrating space-Time increment data of which the Time values are timeM to establish a Time sequence data layer of the timeM;
the time-space tracing process based on elements comprises the following steps: based on the GUID field and the OldGUID field in the chain storage structure, iterative query is performed according to the GUID field of the specified element to obtain the initial element of the specified element, namely, element-based space-time tracing is realized.
2. The spatiotemporal data integrated management method based on chain storage according to claim 1, characterized in that: the Status field comprises three state values of new, deleted and modified, wherein the new, deleted and modified state values respectively represent three states of adding, deleting and changing.
3. The spatiotemporal data integrated management method based on chain storage according to claim 1, characterized in that: the space-time data chain is a chain relation of space-time data elements of different temporal versions established through a GUID field and an OldGUID field.
4. The spatiotemporal data integration management method based on chain storage according to claim 1, 2 or 3, characterized in that: the spatio-temporal tracing between different temporal version spatio-temporal data elements is performed by the GUID field and the globally unique identifier stored in the OldGUID field.
5. The spatiotemporal data integrated management method based on chain storage according to claim 1, characterized in that: in step S4, the new added element is used to complete the editing of the new added point, the new added line, the new added surface, the new added attribute field and the attribute field value, and after completing the addition of the element, the new time of the element is stored in the chain storage structure, and the current state of the new added element is updated.
6. The spatiotemporal data integrated management method based on chain storage according to claim 1, characterized in that: the deleting element is used for realizing single deletion or batch deletion of the elements, storing the deleting time of the elements in the chained storage structure after the elements are deleted, and updating the global unique identifier and the current state of the deleted elements.
7. The spatiotemporal data integrated management method based on chain storage according to claim 1, characterized in that: the editing element is used for realizing the addition of nodes, the deletion of nodes, the adjustment of the spatial position of the point location, the addition of attribute fields, the deletion of attribute fields and the editing of attribute field values, storing the modification time of the element in a chain storage structure after the element is edited, and updating the global unique identifier and the current state of the deleted element.
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