Geotagged tweets, Foursquare check-ins and other forms of volunteered geographic information (VGI) play a critical role in numerous studies and a large range of intelligent technologies. We show that three of the most commonly used sources of VGI – Twitter, Flickr, and Foursquare – are biased towards urban perspectives at the expense of rural ones. Utilizing a geostatistics-based approach, we d...

Geotagged tweets, Foursquare check-ins and other forms of volunteered geographic information (VGI) play a critical role in numerous studies and a large range of intelligent technologies. We show that three of the most commonly used sources of VGI – Twitter, Flickr, and Foursquare – are biased towards urban perspectives at the expense of rural ones. Utilizing a geostatistics-based approach, we d...

In the past few years, volunteered geographic information (VGI) has emerged as a new resource for improving the management of emergencies. Despite the growing body of research dedicated to the use of VGI in crisis management, studies are still needed that systematically investigate the incorporation of VGI into practical emergency management. To fill this gap, this paper proposes a research des...

The increasing availability of sensor devices has resulted in important volumes of sensor data, which has raised the issue of making these data fully discoverable and interpretable by applications and end-users. The idea of OGC Sensor Web Enablement (SWE) has addressed this issue by proposing a set of standards to enable accessibility of sensor data over the Web. Similarly, there is a growing i...

Volunteered Geographic Information (VGI) is a Web phenomenon known as “user-generated content”, which involves resources from Web 2.0 and geographic data. Geobrowsers are websites that collect and provide VGI. These systems, however, do not follow norms or standards for data collection or documentation, which makes it difficult to recover such data and limits the interoperability among VGI syst...

Volunteered geographic information (VGI) refers to the widespread engagement of citizens in the creation of geographic information, often through social media, smartphones and online mapping tools. It represents a shift in the ways information is created, shared, used and experienced, and has important implications for disaster management. This research examines the potential role of VGI in fos...

----------------------------------------------------------------------ABSTRACT------------------------------------------------This review paper presents a study about to create qualitative VGI(volunteered geographic information) and its semantic web representation .Creation of VGI describes about to create ,use and share volumes of spatial data in an increasingly accessible fashion. This paper ...

Volunteered Geographic Information (VGI) has the potential to provide benefit to endusers over and above that of Professional Geographic Information (PGI). A multi-methods approach consisting of participatory observation, focus groups and diary studies, was used to study how VGI and PGI were actually used by a target user group. A theoretical framework of information relevance was used to under...