Results 101 to 110 of about 17,825 (204)

Exploiting the Potential of VGI Metadata to Develop A Data-Driven Framework for Predicting User’s Proficiency in OpenStreetMap Context

ISPRS International Journal of Geo-Information, 2019
Volunteered geographic information (VGI) encourages citizens to contribute geographic data voluntarily that helps to enhance geospatial databases. VGI’s significant limitations are trustworthiness and reliability concerning data quality due to the ...
Gangothri Rajaram, KR Manjula
doaj   +1 more source

One- and two-dimensional N-qubit systems in capacitively coupled quantum dots

, 2001
Coulomb blockade effects in capacitively coupled quantum dots can be utilized for constructing an N-qubit system with antiferromagnetic Ising interactions.
A. Barenco, B. E. Kane, B. Hoefflinger, C. H. Bennett, C. Livermore, D. Loss, D. P. DiVincenzo, D. P. DiVincenzo, D. V. Averin, G. Springholz, J. E. Mooij, L. A. Openov, L. Guo, L. M. K. Vandersypen, L. Viola, N. B. Zhitenev, N. Linden, P. Zanardi, R. Landauer, R. Landauer, R. R. Ernst, S. Lloyd, S. Lloyd, S. Tiwari, T. Fujisawa, T. H. Oosterkamp, T. Tanamoto, Tetsufumi Tanamoto, Y. Makhlin, Y. Nakamura   +29 more
core   +1 more source

Topological Designs

, 2013
We give an exponential upper and a quadratic lower bound on the number of pairwise non-isotopic simple closed curves can be placed on a closed surface of genus g such that any two of the curves intersects at most once.
A Haas, B Farb, G Brinkmann, Igor Rivin, Justin Malestein, Louis Theran, M Juvan, P Turán, VH Vu   +8 more
core   +1 more source

A PageRank-based Reputation Model for VGI Data

Procedia Computer Science, 2016
AbstractQuality of data is one of the key issues in the domain of Volunteered geographic information (VGI). To this purpose, in literature VGI data has been sometime compared with authoritative geospatial data. Evaluation of single contributions to VGI databases is more relevant for some applications and typically relies on evaluating reputation of ...
Lodigiani, Carlo, MELCHIORI, Michele
openaire   +2 more sources

IL FENOMENO VOLUNTEERED GEOGRAPHIC INFORMATION

GEOmedia, 2014
The contribution addresses the phenomenon of Voluntereed Geographic Information explaining these new and burgeoning sources of information offers multidisciplinary scientists an unprecedented opportunity to conduct research on a variety of topics at ...
Flavio Lupia, Cristina Capineri
doaj  

VGI and beyond.From data to mapping

, 2017
This chapter will introduce the concept of Volunteered Geographic Information (VGI) within the practices of mapping and cartography. Our aim is to provide an accessible overview of the area, which has grown rapidly since the mid 2000s; but first we need to define what we mean by ...
Haklay, Muki, CAPINERI, CRISTINA, Antoniou, Vyron   +2 more
openaire   +2 more sources

Volunteered geographic information (VGI) primer

, 2012
This guide is one in a series of Operational Policy documents being developed by GeoConnections. This guide is intended to inform CGDI stakeholders about the nature and scope of VGI and the realities, challenges and good practices of related operational policies.
openaire   +1 more source

VGI and crisis mapping in an emergency situation. Comparison of four case studies: Haiti, Kibera, Kathmandu, Centre Italy

GEOmedia, 2017
Over the last decade new voluntary mapping patterns are commonly known as VGI – Volunteered Geographic Information – that is, geo-localized information created voluntarily and consciously by web users.
Lucia Saganeiti, Federico Amato, Beniamino Murgante, Gabriele Nolè   +3 more
doaj  

Geographic proximity and homophily effects drive social interactions within VGI communities: an example of iNaturalist

International Journal of Digital Earth
Social interactions among online community members contributing to volunteered geographic information (VGI) are a key element and often crucial to VGI project success.
Guiming Zhang, Xi Gong, Di Zhu
doaj   +1 more source

VGRIDSG: An unstructured surface grid generation program [PDF]

This report contains an overview of the VGRIDSG unstructured surface grid generation program. The VGRIDSG program was created from the VGRID3D unstructured grid generation program developed by Vigyan, Inc.
Bockelie, Michael J.
core   +1 more source