Volunteered geographic information credibility calculation method

A computing method and geographic information technology, applied in the field of crowdsourced geographic information, can solve the problems of lack of quantitative evaluation of volunteer geographic information reputation, low-quality data, VGI incomplete areas, etc.

Active Publication Date: 2015-05-13
CENT SOUTH UNIV
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  • Summary
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Problems solved by technology

Many scholars have compared and analyzed the VGI data and professional data in the area of ​​interest [Transactions in GIS, 2010, Girres, J.F. and G.Touya. Quality assessment of the French OpenStreetMap dataset]. Through comparative analysis, scholars generally believe that in Europe The average location accuracy of crowdsourced data in urban areas is better than 7m, and the current situation and richness even exceed professional data, but VGI has serious incompleteness and unevenness in various regions
Since this type of method requires high-precision professional data sets, it is difficult to be widely used in VGI data quality evaluation
[0005] In short, although the volunteer geographic information system has been developed for many years and a large amount of...

Method used

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  • Volunteered geographic information credibility calculation method
  • Volunteered geographic information credibility calculation method

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Embodiment 1

[0070] The method of the present invention is as follows: for a new geographic object, the geographic object is only contributed by a single contributor, and its reputation value is the reputation value of the contributor; for a geographic object with multiple versions, the object editing process includes multiple editors author, whose reputation value is determined by the contributors participating in the editing and the editing situation.

[0071] A contributor's current reputation is derived by weighting the contributor's initial and review reputation.

[0072] Contributors register in the VGI system, fill in relevant registration information, and determine the user's initial reputation based on the completeness of user information and the degree of identity authentication.

[0073] In the initial reputation calculation, the contributor’s registration information is divided into integrity maintenance and ability dimension. According to the user registration information such...

Embodiment 2

[0101] The implementation of the present invention mainly includes three items: 1) volunteer information collection (ie, user registration), 2) version similarity calculation, and 3) realization and verification of the volunteer and target credibility calculation system. The specific implementation manners of these three links are described respectively below.

[0102] 1) Volunteer information collection (ie user registration)

[0103] In order to establish a volunteer trust database, it is necessary to collect volunteer registration information, such as real name, ID, email, mobile phone number, major, occupation, and age information. In the Eclipse development environment, the inventor uses JAVA language, JSP, JavaScript secondary development, Baidu Map API and other technologies to realize the server-side volunteer information registration. When registering the location information of volunteers on the server side, Baidu Map pops up. Click a certain location point on the m...

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Abstract

The invention discloses a volunteered geographic information credibility calculation method. Credibility of a VGI (volunteered geographic information) target is calculated according to credibility of a VGI contributor, and the credibility of the VGI contributor consists of initial credibility obtained by calculation of user registration information and evaluation credibility acquired from system behavior contributions. The method includes: defining once-editing results of a certain geographic space target edited by each volunteer as one version, and when other users edit the target version, calculating version similarity to acquire degrees of support, to the target version edited by the corresponding volunteer, of other users; calculating degrees of support, to each target contributed by a certain volunteer, of other contributors and subjecting each degree of support to weighted calculation to acquire comprehensive evaluation credibility of the corresponding volunteer. By adoption of the volunteered geographic information credibility calculation method, volunteered geographic information credibility can be evaluated objectively without enabling users to directly evaluate other volunteers by scoring, and scientific basis is provided for cleaning and screening of volunteered geographic information.

Description

technical field [0001] The invention belongs to the technical field of crowdsourced geographic information (VGI) applications, and in particular relates to a method for calculating the reputation of volunteer geographic information. Background technique [0002] The problem of data quality has always been a fundamental problem in the geographic information industry. Since volunteer geographic information (Volunteered Geographic Information, VGI) or crowd-sourcing information (Crowd-sourcing data) is reported spontaneously by public volunteers, there are a lot of malicious, False, low-quality data, compared with the data obtained by traditional professionals, its credibility has many uncertainties, and it needs to be evaluated before it can be used with confidence [Journal of Wuhan University: Information Science Edition, 2010. Li Deren, Qian Xin Lin, On Data Management of Spontaneous Geographic Information]. But the research work in this area has just started, and the resea...

Claims

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Application Information

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IPC IPC(8): G06F17/30
CPCG06F16/215G06F16/29
Inventor 周晓光赵肄江
Owner CENT SOUTH UNIV
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