Cartographic Representation of Spatial Data Quality Parameters in Volunteered Geographic Information

摘要

Volunteered geographic information (VGI) are constantly being added, edited or removed by the users, so their quality is not static. As VGI users do not necessarily have high spatial knowledge, system administrators control the quality of information in order to provide the users with the appropr iate datasets. However, quality of spatial data has several parameters, so the appropriate data may differ from one application to another. Unlike the geographic communities, presenting the standard metadata statements is not so efficient, as they may not be familiar for VGI users. In this paper, we propose providing VGI users with the spatial data quality parameters through simple cartographic representations and let them decide on appropriateness of the datasets for the application at hand. The users select the desired quality parameters as well as the visualization element (e.g. color, line thickness, intensity, style, etc.) to classify the datasets. The datasets are represented by the selected element based on their metadata information, which help the users to visually evaluate the quality of datasets.