نتایج جستجو برای: کیفیت vgi

تعداد نتایج: 60221  

Journal: :Environment And Planning B: Urban Analytics And City Science 2022

The study set out to investigate how the experience of creating a map-based participatory system might help identify what is needed support production relevant volunteered geographic information (VGI) about urban areas exposed impacts adverse weather events in Trondheim, Norway. This article details systematic approach used collect VGI, starting from active engagement end users during design an...

2011
James W. Wynne Tim J. Bull Torsten Seemann Dieter M. Bulach Josef Wagner Carl D. Kirkwood Wojtek P. Michalski

A comparative genomics approach was utilised to compare the genomes of Mycobacterium avium subspecies paratuberculosis (MAP) isolated from early onset paediatric Crohn's disease (CD) patients as well as Johne's diseased animals. Draft genome sequences were produced for MAP isolates derived from four CD patients, one ulcerative colitis (UC) patient, and two non-inflammatory bowel disease (IBD) c...

Journal: :ISPRS Int. J. Geo-Information 2016
Peter Mooney Marco Minghini Mari Laakso Vyron Antoniou Ana-Maria Olteanu Raimond Andriani Skopeliti

A protocol for the collection of vector data in Volunteered Geographic Information (VGI) projects is proposed. VGI is a source of crowdsourced geographic data and information which is comparable, and in some cases better, than equivalent data from National Mapping Agencies (NMAs) and Commercial Surveying Companies (CSC). However, there are many differences in how NMAs and CSC collect, analyse, ...

Journal: :ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences 2015

2014
Brent J. Hecht Monica Stephens

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...

2014
Brent Hecht Monica Stephens

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...

2016
João Porto de Albuquerque Cidália Costa Fonte J.-P. de Almeida Alberto Cardoso

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...

Journal: :ISPRS Int. J. Geo-Information 2013
Mohamed Bakillah Steve H. L. Liang Alexander Zipf Jamal Jokar Arsanjani

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...

2013
Artur Ribeiro de Aquino Luis Otávio Alvares Chiara Renso Vania Bogorny

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...

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