| 来源类型 | Article
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| 规范类型 | 其他
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| DOI | 10.1080/00087041.2015.1108658
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| Accurate attribute mapping from volunteered geographic information: issues of volunteer quantity and quality. |
| Foody GM; See L; Fritz S; van der Velde M; Perger C; Schill C; Boyd DS; Comber A
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| 发表日期 | 2015
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| 出处 | The Cartographic Journal 52 (4): 336-344
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| 出版年 | 2015
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| 语种 | 英语
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| 摘要 | Crowdsourcing is a popular means of acquiring data, but the use of such data is limited by concerns with its quality. This is evident within cartography and geographical sciences more generally, with the quality of volunteered geographic information (VGI) recognized as major challenge to address if the full potential of citizen sensing in mapping applications is to be realized. Here, a means to characterize the quality of volunteers, based only on the data they contribute, was used to explore issues connected with the quantity and quality of volunteers for attribute mapping. The focus was on data in the form of annotations or class labels provided by volunteers who visually interpreted an attribute, land cover, from a series of satellite sensor images. A latent class model was found to be able to provide accurate characterizations of the quality of volunteers in terms of the accuracy of their labeling, irrespective of the number of cases that they labeled. The accuracy with which a volunteer could be characterized tended to increase with the number of volunteers contributing but was typically good at all but small numbers of volunteers. Moreover, the ability to characterize volunteers in terms of the quaity of their labeling could be used constructively. For example, volunteers could be ranked in terms of quality which could then be used to select a sub-set as input to a subsequent mapping task. This was particularly important as an identified subset of volunteers could undertake a task more accurately than when part of a larger group of volunteers. The results highlight that both the quantity and quality of volunteers need consideration and that the use of VGI may be enhanced through information on the quality of the volunteers derived entirely from the data provided without any additional information. |
| 主题 | Ecosystems Services and Management (ESM)
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| 关键词 | neogeography, thematic mapping, accuracy, citizen science
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| URL | http://pure.iiasa.ac.at/id/eprint/10757/
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| 来源智库 | International Institute for Applied Systems Analysis (Austria)
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| 引用统计 |
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| 资源类型 | 智库出版物
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| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/130167
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推荐引用方式
GB/T 7714 |
Foody GM,See L,Fritz S,et al. Accurate attribute mapping from volunteered geographic information: issues of volunteer quantity and quality.. 2015.
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文件名：
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Accurate%20attribute%20mapping%20from%20volunteered%20geographic%20information.pdf
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