This article sets forth the early phases of a methodological proposal for designing and developing Volunteered Geographic Information (VGI) initiatives based on a system perspective analysis in which the components depend and interact dynamically among each other. First, it focuses on those characteristics of VGI projects that present different goals and modes of organization, while using a cro...

User-generated content (UGC) platforms on the Internet have experienced a steep increase in data contributions in recent years. The ubiquitous usage of location-enabled devices, such as smartphones, allows contributors to share their geographic information on a number of selected online portals. The collected information is oftentimes referred to as volunteered geographic information (VGI). One...

Humanitarian logistics is a major factor for the success of humanitarian operations, making use of a broad range of infrastructure and resources in highly unstable and volatile environments. Due to the need for accuracy and timeliness, the information must be updated and related to the real variables of the affected area. In this context, volunteered geographic information (VGI), providedby loc...

The appearance of OpenStreetMap (OSM) in 2004 sparked a phenomenon known as Volunteered Geographic Information (VGI). Today, VGI comes in many flavours (e.g. toponyms, GPS tracks, geo-tagged photos, micro-blogging or complete topographic maps) and from various sources. One subject that has attracted research interest from the early days of VGI is how good such datasets are and how to combine th...

شاخص‌های مؤثر بر ادراک کیفیت بازیابی در فضاهای شهری مورد علاقه شهروندان مشهدی (با تأکید کاهش فشار روانی افراد)

Volunteered Geographic Information (VGI) is often collected by non-expert users. This raises concerns about the quality and veracity of such data. There has been much effort to understand quantify VGI. Extrinsic measures which compare VGI authoritative data sources as National Mapping Agencies are common but cost slow update frequency hinder task. On other hand, intrinsic heuristics or models b...

K E Y W O R D S environmental controlled light microscopy, pharmaceutical solids, amorphous transitions, stability, environmental control stage A C K N O W L E D G E M E N T S The authors wish to thank Sebastian Kaerger for his help in producing the spray dried salbutamol sulphate. A U T H O R D E TA I L S Dr Paul M. Young, Pharmaceutical Technology Research Group, Department of Pharmacy and Ph...

Volunteered geographic information (VGI) is a phenomenon of recent years, offering an alternative mechanism for the acquisition and compilation of geographic information. As such it offers substantial advantages, but suffers from a general lack of quality assurance. We discuss the issues involved in the determination of quality for geospatial data, and trace the history of research on VGI quali...