نتایج جستجو برای: کیفیت vgi

تعداد نتایج: 60221  

Journal: :Journal of Wine Research 2022

The recently formalized concept of ‘Vineyard Geological Identity’ (VGI) was applied to two vineyards in the Champlain Valley Vermont, USA. studied, LP and SV, both produce hybrid grape known as ‘Marquette’, are at equivalent elevations, have a similar macroclimate, were inundated by proglacial Lake Vermont during last deglaciation. In contrast, bedrock differs beneath sites, SV under shallow ma...

Journal: :Int. J. Digital Earth 2016
Carl F. Salk Tobias Sturn Linda M. See Steffen Fritz Christoph Perger

Volunteered Geographical Information (VGI) is the assembly of spatial information based on public input. While VGI has proliferated in recent years, assessing the quality of volunteercontributed data has proven challenging, leading some to question the efficiency of such programs. In this paper, we compare several quality metrics for individual volunteers’ contributions. The data was the produc...

2015
Eric Vaz Jamal Jokar Arsanjani

Geo-located information is increasingly important for regional decision making and spatial assessment. Toronto has witnessed rapid demographic and economic change over the last decades, making the Toronto region the fourth largest economic centre in North America. From a policymaker’s perspective, understanding land use for planning purposes is critical for better urban planning. Such informati...

2008
Andrew J. Flanagin Miriam J. Metzger

The proliferation of information sources as a result of networked computers and other interconnected devices has prompted significant changes in the amount, availability, and nature of geographic information. Among the more significant changes is the increasing amount of readily available volunteered geographic information. Although volunteered information has fundamentally enhanced geographic ...

2014
Sandro Bimonte Omar Boucelma Olivier Machabert Sana Sellami

Résumé. Les entrepôts de données spatiales et les systèmes SOLAP permettent l’analyse en ligne de gros volumes de données géo référencées. Dans un contexte de gestion des risques naturels, ces systèmes ont été utilisés avec succès sur des données officielles dont la collecte suit un processus bien établi. Le développement récent d’outils collaboratifs pour la saisie de données géographiques, y ...

Journal: :Future Internet 2012
Sven Schade Frank O. Ostermann Laura Spinsanti Werner Kuhn

Although the integration of sensor-based information into analysis and decision making has been a research topic for many years, semantic interoperability has not yet been reached. The advent of user-generated content for the geospatial domain, Volunteered Geographic Information (VGI), makes it even more difficult to establish semantic integration. This paper proposes a novel approach to integr...

Journal: :ISPRS international journal of geo-information 2021

Providing long-term data about the evolution of railway networks in Europe may help us understand how European Union (EU) member states behave long-term, and they can comply with present EU recommendations. This paper proposes a methodology for collecting stations, at maximal extent French network, century ago.The expected outcome is geocoded dataset stations (gares), which: (a) links gares to ...

2011
Francesco Rotondo Francesco Selicato

The history of the use of informatics tools to support collaborative planning is relatively recent. Personal computer, multimedia techniques and the web provided useful technology for the purposes of collaborative processes. Following the advent of Web 2.0, the wide diffusion of electronic devices containing geo-referenced information have resulted in the production of extensive spatial data. T...

2011
Sadiq Hussain

When the information created online by users has a spatial reference, it is known as Volunteered Geographic Information (VGI). The increased availability of spatiotemporal data collected from satellite imagery and other remote sensors provides opportunities for enhanced analysis of Spatiotemporal Patterns. This area can be defined as efficiently discovering interesting patterns from large data ...

Journal: :IJAEIS 2014
Sandro Bimonte Omar Boucelma Olivier Machabert Sana Sellami

Spatial data warehouses (SDW) and spatial OLAP (SOLAP) systems are well-known business intelligence technologies that aim to support a multidimensional and online analysis for a large volume of geo-referenced datasets. SOLAP systems are already used in the context of natural hazards for analyzing sensor data and experts’ measurements. Recently, new data gathering tools coined as volunteered geo...

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