As mobile devices, access to geographical information, and migration from web 1.0 to web 2.0 advance, users started playing the role of consumers, producers, and communicators. As a result, several internet systems have spawned that collect Volunteered Geographical Information (VGI). VGI collection systems often need to be developed within short timeframes. This paper presents a comparative ana...

More than 400000 vascular grafts are inserted annually in the USA. Graft insertion is complicated by infection in 0.5-4% of cases. Vascular graft infections (VGIs) are becoming one of the most frequent prosthesis-related infections and are associated with considerable mortality, ranging from 10 to 25% within 30 days following the diagnosis. Treatment of VGI is based on urgent surgical removal o...

The purpose of the paper is to investigate the Volunteered Geographic Information (VGI), which is still at a very early stage, to identify its use worldwide including characteristic examples and research its potential applications in Cultural Heritage andArchaeology as a new field for study. In the first part of the paper a brief review of the field is given, the international terminology and i...

The quality of volunteered geographic information (VGI) is questionable as it emerges through a diversity contributors. reputation contributor increasingly applied to VGI assessment and its assurance. Research on how measure validate reputation, however, still required. This study proposes an evaluation-based weighted PageRank (EWPR) algorithm provide ranking metric reputation. Ranking establis...

Studies have analysed the quality of volunteered geographic information (VGI) datasets, assessing the positional accuracy of features and the completeness of specific attributes. While it has been shown that VGI can, in some context, reach a high positional accuracy, these works have also highlighted a large spatial heterogeneity in positional accuracy, completeness but also with regards to the...

Quality evaluation and control has become the main concern of VGI. In this paper, trust is used as a proxy of VGI quality, a versionsimilarity based trust degree computation model for crowdsourcing geographic data is presented. This model is based on the assumption that the quality of VGI objects mainly determined by the professional skill and integrity (called reputation in this paper), and th...

An increasing number of Volunteered Geographic Information (VGI) and social media platforms have been continuously growing in size, which have provided massive georeferenced data in many forms including textual information, photographs, and geoinformation. These georeferenced data have either been actively contributed (e.g., adding data to OpenStreetMap (OSM) or Mapillary) or collected in a mor...

Integrated pest management (IPM) involves integrating multiple pest control methods based on site information obtained through inspection, monitoring, and reports. IPM has been deployed to achieve the judicious use of pesticides and has become one of the most important methods of securing agricultural productivity. Despite the efforts made to strengthen IPM during the past decades, overuse as w...

Currently, online maps are of the most innovative and significant sources information in people's daily life. However, quality assessment volunteered geographic (VGI) data raises some challenges. This research aims to analyze VGI participants' level expertise through evaluation their background information. Towards this goal, an android application was developed test users' knowledge cognition ...

Volunteered Geographic Information (VGI) is an approach to crowdsource information about geospatial objects around us, as implemented in Open Street Map, Google Map Maker and WikiMapia projects. The value of this content has been recognized by both researchers and organizations for acquiring free, timely and detailed spatial data versus standard spatial data warehouses where objects are created...