CN113254808A - GIS data screening method and system - Google Patents
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Abstract
The invention discloses a GIS data screening method and a system, wherein the method comprises the following steps: the method comprises the steps of obtaining keywords input by a target user, generating an index factor according to the keywords, screening data in a preset server database by using the index factor to obtain target GIS data, sending a prompt for obtaining an expected display type to the target user, receiving a target display type fed back by the target user, wherein the target display type comprises a spatial data type and a topological data type, and uploading the GIS data to a terminal of the target user in the target type mode. The screened target GIS data can be displayed on the user terminal in different display types according to the requirements of different users by enabling the users to select the expected display types, so that the users can quickly understand and digest the screened GIS data, and the working efficiency and the experience of the users are improved.
Description
Technical Field
The invention relates to the technical field of geographic information data processing, in particular to a GIS data screening method and a GIS data screening system.
Background
A geographic information system (geographic information system), also called as a geographic information system, is abbreviated as GIS map data, and is a technical system for collecting, storing, managing, operating, analyzing, displaying and describing relevant geographic distribution data in the whole or part of the space of the earth surface layer (including the atmosphere) under the support of a computer hardware and software system. In recent years, along with the acceleration of the informatization process of China, the number of mobile phone users is increased rapidly, the amount of GIS data transmitted is increasingly huge, the system load when the GIS data of online users are received and displayed on the whole disk is overlarge, and certain influence is caused on the utilization rate of system computing resources and the effective performance rate of a GIS monitoring system, so that scientific researchers set a method for screening the GIS data to realize the unused requirements of different users, further reduce the load of a server and improve the performance of the server, the existing GIS data screening method is used for inputting key words for the users, and the server searches according to the key words so as to call the GIS data needed by the users from a database, and the method has the following defects: for different people, GIS data in a single display form may cause misunderstanding of a user or even completely incompletion of logic, so that the working efficiency of the user is reduced to a certain extent, and the use experience of the user is influenced.
Disclosure of Invention
Aiming at the displayed problems, the invention provides a GIS data screening method and a GIS data screening system to solve the problems that GIS data in a single display form possibly causes misunderstanding or even completely incompletion of logic conditions of users for different people, reduces the working efficiency of the users to a certain extent and influences the use experience of the users.
A GIS data screening method comprises the following steps:
acquiring a keyword input by a target user, and generating an index factor according to the keyword;
screening data in a preset server database by using the index factors to obtain target GIS data;
sending a prompt for acquiring a desired display type to the target user, and receiving a target display type fed back by the target user, wherein the target display type comprises a spatial data type and a topological data type;
and uploading the GIS data to a terminal of a target user in a target type mode.
Preferably, before obtaining a keyword input by a target user and generating an index factor according to the keyword, the method further includes:
uploading a preset GIS data packet to a preset OSS;
performing quality inspection and warehousing processing on the preset GIS data packet by using the OSS;
after the storage is finished, encoding the preset GIS data packet into spatial data and topological data;
and storing the spatial data and the topological data into the preset server database.
Preferably, the storing the spatial data and the topology data in the preset server database includes:
adding a spatial database and a topological database in the preset server database;
inserting the spatial data and the topological data into a spatial database and a topological database respectively;
acquiring attribute factors of each data in the spatial data and the topological data, and constructing indexes for the spatial data and the topological data in the spatial database and the topological database according to the attribute factors of each data;
and after the construction is finished, setting a preset login account and a preset login password for the preset server database.
Preferably, the obtaining the keyword input by the target user and generating the index factor according to the keyword includes:
detecting the integrity of the keywords, confirming whether the keywords are qualified or not by using a preset rule after the detection is finished, if so, acquiring characteristic factors of the keywords, otherwise, sending keyword errors to a target user, and acquiring the prompt of the keywords again;
generating a screening condition according to the characteristic factors of the keywords;
and evaluating the limitation index of the screening condition, and generating the index factor according to the characteristic factor of the keyword when the limitation index is less than or equal to a first preset threshold value.
Preferably, the data screening is performed in a preset server database by using the index factor to obtain the target GIS data, and the method includes:
determining a characteristic matrix for storing GIS data in the preset server database;
taking the characteristic factors of the keywords as retrieval basis, and obtaining matched characteristic vectors corresponding to the characteristic factors of the keywords in the characteristic matrix of the stored GIS data;
and determining the current storage GIS data corresponding to the matched feature vector, and determining the current storage GIS data as the target GIS data.
Preferably, after obtaining a keyword input by a target user, generating an index factor according to the keyword, and before performing data screening in a preset server database by using the index factor, the method further includes:
determining a target fuzzy grade of the keyword by using a preset fuzzy grade algorithm;
determining a target retrieval mode based on the keywords according to the target fuzzy grade;
determining a plurality of target working nodes of the preset server according to the target retrieval mode;
determining whether each working node works normally or not by sending a data transmission packet to the plurality of target nodes to obtain a data response packet of each target working node;
if the plurality of target working nodes work normally, screening data in a preset server database through the keywords in the target retrieval mode;
if any target working node works abnormally, the preset node repairing tool is used for repairing the node, and detection is carried out again until all the target working nodes work normally.
Preferably, the determining the target fuzzy level of the keyword by using a preset fuzzy level algorithm includes:
dividing the importance level of the preset keywords according to the sensitivity of the preset keywords;
constructing a preset evaluation index system based on GIS data stored in a preset server database, and evaluating the security level of each data content in the stored GIS data by using the preset evaluation index system;
establishing a comparison matrix according to the importance level of the preset keyword and the security level of each subdata content in the stored GIS data;
determining a GIS data membership weight of each preset keyword according to the comparison matrix;
constructing a fuzzy grade mathematical model of the preset keywords according to the GIS data membership weight of each preset keyword;
analyzing a keyword input by a target user to obtain a plurality of subdata membership weight values of the input keyword;
constructing a membership matrix of the input keyword according to the membership weights of the plurality of subdata of the input keyword;
determining a first supplementary factor and a second supplementary factor of the input keywords based on the similar subdata by using the membership degree matrix;
converting the first and second supplemental factors into quantization levels;
inputting the first supplementary factor and the second supplementary factor which are converted into the quantization levels into a fuzzy level mathematical model of the preset keyword, and calculating by using a preset fuzzy level algorithm set in the fuzzy level mathematical model to obtain a first fuzzy level of the input keyword;
acquiring a plurality of subdata membership weight values of the input keyword to obtain a weight vector of the input keyword;
calculating the product of the weight vector and the membership matrix of the input keyword to obtain a comprehensive fuzzy evaluation vector of the input keyword;
calculating the product of the comprehensive fuzzy evaluation vector and the weight vector of the input keyword to obtain a fuzzy grade correction factor of the input keyword;
correcting the first fuzzy grade by using the fuzzy grade correction factor to obtain a second fuzzy grade;
and determining the second fuzzy grade as a target fuzzy grade of the input keyword.
Preferably, the method further comprises:
when the target login account and the target login password input by the target user are matched with the preset login account and the preset login password, generating a verification file;
determining a plurality of file blocks in the check file;
determining a file signature for each file block using a plurality of types of preset hash functions:
wherein, FiFile signature, S, expressed as the ith file blockiThe preset hash function is expressed as a target type corresponding to the ith file block, g is expressed as a first random number, and m is expressed asiThe attribute factor is expressed as the ith file block, and q is expressed as a second random number;
generating a verification request sequence for each file block;
establishing a verification instruction, uploading the verification instruction and a verification file to a terminal of a target user, and receiving a terminal feedback file of the target user;
analyzing the feedback file to obtain an analysis result;
and calculating the security index of the terminal of the target user according to the analysis result and the file signature of each file block:
wherein Q represents a security index of a terminal of a target user, N represents the number of file blocks, Aj1Set sequence value, A, expressed as jth file blockj2Expressed as the feedback sequence value of the jth file block in the parsing result, Fj1Represented as the jth fileFile signature of the block, Fj2Expressed as the digital signature of the jth file block in the parsing result, HjExpressing the integrity of the jth file block in the analysis result, and expressing k as the preset integrity of each character block in the check file;
calculating the reliability index of the target user terminal according to the security index of the target user terminal:
wherein D is the reliability index of the target user terminal, t is the interval duration between the sending of the check file and the receiving of the feedback file, and t is the reliability index of the target user terminal1Expressed as the time length from the sending of the verification file to the receiving of the verification file by the target user terminal, t3The time length from the time when the target user terminal sends the feedback file to the time when the feedback file is received is shown, e is a natural constant and takes a value of 2.72, M is the number of times that the target user calls the GIS history, R is the number of times that the target user calls the GIS historyaRepresenting the importance of GIS data called for the a-th time, and representing the epsilon as the calling frequency of a target user;
and when the reliability index of the target user terminal is greater than or equal to a second preset threshold value, determining that the target user has the authority of safely calling the GIS data, otherwise, sending a prompt that the target user does not have the authority of safely calling the GIS data.
A GIS data screening system, the system comprising:
the generating module is used for acquiring keywords input by a target user and generating an index factor according to the keywords;
the screening module is used for screening data in a preset server database by using the index factors to obtain target GIS data;
the receiving module is used for sending a prompt for obtaining an expected display type to the target user and receiving a target display type fed back by the target user, wherein the target display type comprises a space data type and a topological data type;
and the uploading module is used for uploading the GIS data to a terminal of a target user in a target type mode.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a flowchart of a GIS data screening method according to the present invention;
FIG. 2 is another flowchart of a GIS data screening method according to the present invention;
FIG. 3 is a flowchart of another operation of the GIS data screening method of the present invention;
fig. 4 is a schematic structural diagram of a GIS data screening system provided in the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
A geographic information system (geographic information system), also called as a geographic information system, is abbreviated as GIS map data, and is a technical system for collecting, storing, managing, operating, analyzing, displaying and describing relevant geographic distribution data in the whole or part of the space of the earth surface layer (including the atmosphere) under the support of a computer hardware and software system. In recent years, along with the acceleration of the informatization process of China, the number of mobile phone users is increased rapidly, the amount of GIS data transmitted is increasingly huge, the system load when the GIS data of online users are received and displayed on the whole disk is overlarge, and certain influence is caused on the utilization rate of system computing resources and the effective performance rate of a GIS monitoring system, so that scientific researchers set a method for screening the GIS data to realize the unused requirements of different users, further reduce the load of a server and improve the performance of the server, the existing GIS data screening method is used for inputting key words for the users, and the server searches according to the key words so as to call the GIS data needed by the users from a database, and the method has the following defects: for different people, GIS data in a single display form may cause misunderstanding of a user or even completely incompletion of logic, so that the working efficiency of the user is reduced to a certain extent, and the use experience of the user is influenced. In order to solve the above problem, the present embodiment discloses a method for screening GIS data.
A method for screening GIS data, as shown in fig. 1, includes the following steps:
step S101, obtaining keywords input by a target user, and generating an index factor according to the keywords;
s102, screening data in a preset server database by using the index factors to obtain target GIS data;
step S103, sending a prompt for obtaining a desired display type to the target user, and receiving a target display type fed back by the target user, wherein the target display type comprises a spatial data type and a topological data type;
and step S104, uploading the GIS data to a terminal of a target user in a target type mode.
The working principle of the technical scheme is as follows: the method comprises the steps of obtaining keywords input by a target user, generating an index factor according to the keywords, screening data in a preset server database by using the index factor to obtain target GIS data, sending a prompt for obtaining an expected display type to the target user, receiving a target display type fed back by the target user, wherein the target display type comprises a spatial data type and a topological data type, and uploading the GIS data to a terminal of the target user in the target type mode.
The beneficial effects of the above technical scheme are: the method can ensure that the screened data is more accurate and complete by generating the index factor by using the keywords input by the target user and further screening the target GIS data required by the target user from the database, the index factor is more efficient compared with a mode of searching the keywords, the screening efficiency is improved, and further, the screened target GIS data can be displayed on the user terminal in different display types according to the requirements of different users by enabling the users to select the expected display type, and then can make the user understand and digest the GIS data of screening fast, improve work efficiency and user's experience and feel, solved among the prior art to different people, GIS data of single display form probably causes the user misunderstanding even does not understand the emergence of the logic condition completely, reduced user's work efficiency to a certain extent, influenced user's use and experienced the problem of feeling.
In one embodiment, as shown in fig. 2, before obtaining a keyword input by a target user and generating an index factor according to the keyword, the method further includes:
step S201, uploading a preset GIS data packet to a preset OSS;
step S202, performing quality inspection and warehousing processing on the preset GIS data packet by using the OSS;
step S203, after the storage is finished, encoding the preset GIS data packet into spatial data and topological data;
and step S204, storing the spatial data and the topological data into the preset server database.
The beneficial effects of the above technical scheme are: the accuracy and the integrity of the uploaded preset GIS data packets can be guaranteed by utilizing the preset OSS to carry out quality inspection and warehousing processing on the preset GIS data packets, the efficiency of a follow-up user in screening and calling the GIS data can be further guaranteed, furthermore, the GIS data can have two different display forms by encoding the GIS data packets into spatial data and topological data, and then data in different types can be provided according to the requirements of the follow-up user in screening and scheduling, and the experience of the user is further improved.
In one embodiment, as shown in fig. 3, the storing the spatial data and the topology data in the preset server database includes:
step S301, adding a spatial database and a topology database in the preset server database;
step S302, inserting the spatial data and the topological data into a spatial database and a topological database respectively;
step S303, acquiring attribute factors of each data in the spatial data and the topological data, and constructing indexes for the spatial data and the topological data in the spatial database and the topological database according to the attribute factors of each data;
and step S304, after the construction is finished, setting a preset login account and a preset login password for the preset server database.
The beneficial effects of the above technical scheme are: the spatial data and the topological data are respectively stored in the correspondingly established databases to ensure that the spatial data and the topological data cannot be mixed when being stored, the stability of subsequent GIS screening and calling is improved, further, the GIS data required by a user can be rapidly screened out according to index factors generated by user keywords by constructing indexes for the spatial data and the topological data, the screening efficiency is further improved, and further, the security and confidentiality of the GIS data in the preset server database can be ensured by setting preset login accounts and login passwords for the preset server database. The problem of property loss caused by data leakage is avoided.
In one embodiment, the obtaining the keywords input by the target user and generating the index factor according to the keywords includes:
detecting the integrity of the keywords, confirming whether the keywords are qualified or not by using a preset rule after the detection is finished, if so, acquiring characteristic factors of the keywords, otherwise, sending keyword errors to a target user, and acquiring the prompt of the keywords again;
generating a screening condition according to the characteristic factors of the keywords;
and evaluating the limitation index of the screening condition, and generating the index factor according to the characteristic factor of the keyword when the limitation index is less than or equal to a first preset threshold value.
The beneficial effects of the above technical scheme are: whether the GIS data can be completely screened out or not can be effectively evaluated through detecting the completeness of the keywords and whether the keywords are qualified or not, and then a user is reminded to replace the keywords when the GIS data cannot be screened out, so that the screening efficiency is further improved, further, the GIS data range screened by the keywords input by a target user can be effectively evaluated through evaluating the limitation index of the screening condition, and then whether the user needs to modify the keywords or not can be determined, and the screening efficiency is further improved.
In one embodiment, the data screening in the preset server database by using the index factor to obtain the target GIS data includes:
determining a characteristic matrix for storing GIS data in the preset server database;
taking the characteristic factors of the keywords as retrieval basis, and obtaining matched characteristic vectors corresponding to the characteristic factors of the keywords in the characteristic matrix of the stored GIS data;
and determining the current storage GIS data corresponding to the matched feature vector, and determining the current storage GIS data as the target GIS data.
The beneficial effects of the above technical scheme are: the form of utilizing the characteristic matrix retrieval can obtain its matching feature vector who corresponds according to the characteristic factor of keyword fast, and is accurate high-efficient and time spent extremely short, has further improved screening efficiency.
In one embodiment, after obtaining a keyword input by a target user, generating an index factor according to the keyword, and before performing data screening in a preset server database by using the index factor, the method further includes:
determining a target fuzzy grade of the keyword by using a preset fuzzy grade algorithm;
determining a target retrieval mode based on the keywords according to the target fuzzy grade;
determining a plurality of target working nodes of the preset server according to the target retrieval mode;
determining whether each working node works normally or not by sending a data transmission packet to the plurality of target nodes to obtain a data response packet of each target working node;
if the plurality of target working nodes work normally, screening data in a preset server database through the keywords in the target retrieval mode;
if any target working node works abnormally, the preset node repairing tool is used for repairing the node, and detection is carried out again until all the target working nodes work normally.
The beneficial effects of the above technical scheme are: whether the work node can work normally or not is detected, so that the situation that data is lost when a user screens GIS data can be avoided, and the precision of obtaining the GIS data is improved.
In one embodiment, the determining the target fuzzy level of the keyword by using a preset fuzzy level algorithm includes:
dividing the importance level of the preset keywords according to the sensitivity of the preset keywords;
constructing a preset evaluation index system based on GIS data stored in a preset server database, and evaluating the security level of each data content in the stored GIS data by using the preset evaluation index system;
establishing a comparison matrix according to the importance level of the preset keyword and the security level of each subdata content in the stored GIS data;
determining a GIS data membership weight of each preset keyword according to the comparison matrix;
constructing a fuzzy grade mathematical model of the preset keywords according to the GIS data membership weight of each preset keyword;
analyzing a keyword input by a target user to obtain a plurality of subdata membership weight values of the input keyword;
constructing a membership matrix of the input keyword according to the membership weights of the plurality of subdata of the input keyword;
determining a first supplementary factor and a second supplementary factor of the input keywords based on the similar subdata by using the membership degree matrix;
converting the first and second supplemental factors into quantization levels;
inputting the first supplementary factor and the second supplementary factor which are converted into the quantization levels into a fuzzy level mathematical model of the preset keyword, and calculating by using a preset fuzzy level algorithm set in the fuzzy level mathematical model to obtain a first fuzzy level of the input keyword;
acquiring a plurality of subdata membership weight values of the input keyword to obtain a weight vector of the input keyword;
calculating the product of the weight vector and the membership matrix of the input keyword to obtain a comprehensive fuzzy evaluation vector of the input keyword;
calculating the product of the comprehensive fuzzy evaluation vector and the weight vector of the input keyword to obtain a fuzzy grade correction factor of the input keyword;
correcting the first fuzzy grade by using the fuzzy grade correction factor to obtain a second fuzzy grade;
and determining the second fuzzy grade as a target fuzzy grade of the input keyword.
The beneficial effects of the above technical scheme are: the target fuzzy grade of the keyword input by the target user can be automatically evaluated by constructing the fuzzy grade data model, and the target fuzzy grade of the input keyword can be comprehensively evaluated based on the membership weight of the keyword input by the target user to each subdata in the GIS data packet, so that the calculation result is more objective and practical, further, the first fuzzy grade is corrected by obtaining the correction factor, the occurrence of a judgment error condition can be avoided, the error is greatly reduced, and the accuracy of the data is improved.
In one embodiment, the method further comprises:
when the target login account and the target login password input by the target user are matched with the preset login account and the preset login password, generating a verification file;
determining a plurality of file blocks in the check file;
determining a file signature for each file block using a plurality of types of preset hash functions:
wherein, FiFile signature, S, expressed as the ith file blockiThe preset hash function is expressed as a target type corresponding to the ith file block, g is expressed as a first random number, and m is expressed asiThe attribute factor is expressed as the ith file block, and q is expressed as a second random number;
generating a verification request sequence for each file block;
establishing a verification instruction, uploading the verification instruction and a verification file to a terminal of a target user, and receiving a terminal feedback file of the target user;
analyzing the feedback file to obtain an analysis result;
and calculating the security index of the terminal of the target user according to the analysis result and the file signature of each file block:
wherein Q represents a security index of a terminal of a target user, N represents the number of file blocks, Aj1Set sequence value, A, expressed as jth file blockj2Expressed as the feedback sequence value of the jth file block in the parsing result, Fj1File signature, denoted as jth file block, Fj2Expressed as the number of jth file block in the parsing resultWord signature, HjExpressing the integrity of the jth file block in the analysis result, and expressing k as the preset integrity of each character block in the check file;
calculating the reliability index of the target user terminal according to the security index of the target user terminal:
wherein D is the reliability index of the target user terminal, t is the interval duration between the sending of the check file and the receiving of the feedback file, and t is the reliability index of the target user terminal1Expressed as the time length from the sending of the verification file to the receiving of the verification file by the target user terminal, t3The time length from the time when the target user terminal sends the feedback file to the time when the feedback file is received is shown, e is a natural constant and takes a value of 2.72, M is the number of times that the target user calls the GIS history, R is the number of times that the target user calls the GIS historyaRepresenting the importance of GIS data called for the a-th time, and representing the epsilon as the calling frequency of a target user;
and when the reliability index of the target user terminal is greater than or equal to a second preset threshold value, determining that the target user has the authority of safely calling the GIS data, otherwise, sending a prompt that the target user does not have the authority of safely calling the GIS data.
The beneficial effects of the above technical scheme are: the method has the advantages that more evaluation data can be guaranteed for follow-up verification work by obtaining the file signature of each file block, the precision of a final verification result is guaranteed, further, the occurrence of the loss situation of GIS data stored in the database caused by the fact that the target user terminal carries viruses to erode the database can be avoided by calculating the security index of the target user terminal, the security and confidentiality of the stored GIS data are further guaranteed, further, whether the target user terminal is reliable or not can be accurately evaluated by calculating the reliability index of the target user terminal, and the security is further improved while the fault tolerance rate is improved.
This embodiment also discloses a GIS data screening system, as shown in fig. 4, this system includes:
a generating module 401, configured to obtain a keyword input by a target user, and generate an index factor according to the keyword;
a screening module 402, configured to perform data screening in a preset server database by using the index factor to obtain target GIS data;
a receiving module 403, configured to send a prompt to the target user to obtain a desired display type, and receive a target display type fed back by the target user, where the target display type includes a spatial data type and a topological data type;
and an uploading module 404, configured to upload the GIS data to a terminal of a target user in the target type.
The working principle and the advantageous effects of the above technical solution have been explained in the method claims, and are not described herein again.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (9)
1. A GIS data screening method is characterized by comprising the following steps:
acquiring a keyword input by a target user, and generating an index factor according to the keyword;
screening data in a preset server database by using the index factors to obtain target GIS data;
sending a prompt for acquiring a desired display type to the target user, and receiving a target display type fed back by the target user, wherein the target display type comprises a spatial data type and a topological data type;
and uploading the GIS data to a terminal of a target user in a target type mode.
2. The GIS data screening method of claim 1, wherein before obtaining keywords input by a target user and generating an index factor according to the keywords, the method further comprises:
uploading a preset GIS data packet to a preset OSS;
performing quality inspection and warehousing processing on the preset GIS data packet by using the OSS;
after the storage is finished, encoding the preset GIS data packet into spatial data and topological data;
and storing the spatial data and the topological data into the preset server database.
3. The GIS data screening method of claim 2, wherein the storing the spatial data and the topology data in the preset server database comprises:
adding a spatial database and a topological database in the preset server database;
inserting the spatial data and the topological data into a spatial database and a topological database respectively;
acquiring attribute factors of each data in the spatial data and the topological data, and constructing indexes for the spatial data and the topological data in the spatial database and the topological database according to the attribute factors of each data;
and after the construction is finished, setting a preset login account and a preset login password for the preset server database.
4. The GIS data screening method of claim 1, wherein the obtaining of the keyword input by the target user and the generating of the index factor according to the keyword comprises:
detecting the integrity of the keywords, confirming whether the keywords are qualified or not by using a preset rule after the detection is finished, if so, acquiring characteristic factors of the keywords, otherwise, sending keyword errors to a target user, and acquiring the prompt of the keywords again;
generating a screening condition according to the characteristic factors of the keywords;
and evaluating the limitation index of the screening condition, and generating the index factor according to the characteristic factor of the keyword when the limitation index is less than or equal to a first preset threshold value.
5. The GIS data screening method of claim 4, wherein the step of screening data in a preset server database by using the index factor to obtain target GIS data comprises:
determining a characteristic matrix for storing GIS data in the preset server database;
taking the characteristic factors of the keywords as retrieval basis, and obtaining matched characteristic vectors corresponding to the characteristic factors of the keywords in the characteristic matrix of the stored GIS data;
and determining the current storage GIS data corresponding to the matched feature vector, and determining the current storage GIS data as the target GIS data.
6. The GIS data filtering method according to claim 1, wherein after obtaining the keywords inputted by the target user, generating the index factor according to the keywords, and before performing data filtering in a preset server database by using the index factor, the method further comprises:
determining a target fuzzy grade of the keyword by using a preset fuzzy grade algorithm;
determining a target retrieval mode based on the keywords according to the target fuzzy grade;
determining a plurality of target working nodes of the preset server according to the target retrieval mode;
determining whether each working node works normally or not by sending a data transmission packet to the plurality of target nodes to obtain a data response packet of each target working node;
if the plurality of target working nodes work normally, screening data in a preset server database through the keywords in the target retrieval mode;
if any target working node works abnormally, the preset node repairing tool is used for repairing the node, and detection is carried out again until all the target working nodes work normally.
7. The GIS data screening method of claim 6, wherein the determining the target fuzzy level of the keyword using a preset fuzzy level algorithm comprises:
dividing the importance level of the preset keywords according to the sensitivity of the preset keywords;
constructing a preset evaluation index system based on GIS data stored in a preset server database, and evaluating the security level of each data content in the stored GIS data by using the preset evaluation index system;
establishing a comparison matrix according to the importance level of the preset keyword and the security level of each subdata content in the stored GIS data;
determining a GIS data membership weight of each preset keyword according to the comparison matrix;
constructing a fuzzy grade mathematical model of the preset keywords according to the GIS data membership weight of each preset keyword;
analyzing a keyword input by a target user to obtain a plurality of subdata membership weight values of the input keyword;
constructing a membership matrix of the input keyword according to the membership weights of the plurality of subdata of the input keyword;
determining a first supplementary factor and a second supplementary factor of the input keywords based on the similar subdata by using the membership degree matrix;
converting the first and second supplemental factors into quantization levels;
inputting the first supplementary factor and the second supplementary factor which are converted into the quantization levels into a fuzzy level mathematical model of the preset keyword, and calculating by using a preset fuzzy level algorithm set in the fuzzy level mathematical model to obtain a first fuzzy level of the input keyword;
acquiring a plurality of subdata membership weight values of the input keyword to obtain a weight vector of the input keyword;
calculating the product of the weight vector and the membership matrix of the input keyword to obtain a comprehensive fuzzy evaluation vector of the input keyword;
calculating the product of the comprehensive fuzzy evaluation vector and the weight vector of the input keyword to obtain a fuzzy grade correction factor of the input keyword;
correcting the first fuzzy grade by using the fuzzy grade correction factor to obtain a second fuzzy grade;
and determining the second fuzzy grade as a target fuzzy grade of the input keyword.
8. The GIS data screening method of claim 3, further comprising:
when the target login account and the target login password input by the target user are matched with the preset login account and the preset login password, generating a verification file;
determining a plurality of file blocks in the check file;
determining a file signature for each file block using a plurality of types of preset hash functions:
wherein, FiFile signature, S, expressed as the ith file blockiThe preset hash function is expressed as a target type corresponding to the ith file block, g is expressed as a first random number, and m is expressed asiThe attribute factor is expressed as the ith file block, and q is expressed as a second random number;
generating a verification request sequence for each file block;
establishing a verification instruction, uploading the verification instruction and a verification file to a terminal of a target user, and receiving a terminal feedback file of the target user;
analyzing the feedback file to obtain an analysis result;
and calculating the security index of the terminal of the target user according to the analysis result and the file signature of each file block:
wherein Q represents a security index of a terminal of a target user, N represents the number of file blocks, Aj1Set sequence value, A, expressed as jth file blockj2Expressed as the feedback sequence value of the jth file block in the parsing result, Fj1File signature, denoted as jth file block, Fj2Expressed as the digital signature of the jth file block in the parsing result, HjExpressing the integrity of the jth file block in the analysis result, and expressing k as the preset integrity of each character block in the check file;
calculating the reliability index of the target user terminal according to the security index of the target user terminal:
wherein D is the reliability index of the target user terminal, t is the interval duration between the sending of the check file and the receiving of the feedback file, and t is the reliability index of the target user terminal1Expressed as the time length from the sending of the verification file to the receiving of the verification file by the target user terminal, t3The time length from the time when the target user terminal sends the feedback file to the time when the feedback file is received is shown, e is a natural constant and takes a value of 2.72, M is the number of times that the target user calls the GIS history, R is the number of times that the target user calls the GIS historyaRepresenting the importance of GIS data called for the a-th time, and representing the epsilon as the calling frequency of a target user;
and when the reliability index of the target user terminal is greater than or equal to a second preset threshold value, determining that the target user has the authority of safely calling the GIS data, otherwise, sending a prompt that the target user does not have the authority of safely calling the GIS data.
9. A GIS data screening system, comprising:
the generating module is used for acquiring keywords input by a target user and generating an index factor according to the keywords;
the screening module is used for screening data in a preset server database by using the index factors to obtain target GIS data;
the receiving module is used for sending a prompt for obtaining an expected display type to the target user and receiving a target display type fed back by the target user, wherein the target display type comprises a space data type and a topological data type;
and the uploading module is used for uploading the GIS data to a terminal of a target user in a target type mode.
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