Results 31 to 40 of about 19,531 (263)

A Semantic Expansion Model for VGI Retrieval [PDF]

ISPRS International Journal of Geo-Information, 2019
OpenStreetMap (OSM) is a representative volunteered geographic information (VGI) project. However, there have been difficulties in retrieving spatial information from OSM. Ontology is an effective knowledge organization and representation method that is often used to enrich the search capabilities of search systems.
Tao Sun, Hui Xia, Lin Li, Hang Shen, Yu Liu   +4 more
openalex   +4 more sources

CLASSIFICATION OF BUILDING FUNCTION USING AVAILABLE SOURCES OF VGI [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
Abstract. This paper examines the feasibility of using data from OpenStreetMap (OSM), Facebook and Foursquare as a source of information on the function of buildings. Such information is rarely openly available and if available, would vary between cities by nomenclature, making comparisons between places difficult.
Cidália C. Fonte, Marco Minghini, Vyron Antoniou, Joaquim Patriarca, Linda See   +4 more
openalex   +8 more sources

The Future of VGI

, 2017
In this final chapter, we speculate on future developments in the field of Volunteered Geographic Information (VGI); we focus on how VGI will be a affected by future technological developments, but we also consider issues such as VGI quality, the relationship of VGI with science and citizens, and the impact of VGI in future cities and societies.
Vyron Antoniou, Linda See, Giles M. Foody, Cidália C. Fonte, Peter Mooney, L. Bastien, Steffen Fritz, H. Liu, A-M. Olteanu-Raimond, Rumiana Vatseva   +9 more
openalex   +5 more sources

Querying VGI by semantic enrichment

, 2016
Volunteered geographic information (VGI) plays an increasing role in current geodata provision. At the same time, due to its lack of structure, it is hard to use as meaningful input in software applications. In this chapter, we embark upon the unstructured character of VGI and on ways to enrich the structure in order to make it suitable for information
Rob Lemmens, Gilles Falquet, Stefano De Sabbata, Bin Jiang, Bénédicte Bucher   +4 more
openalex   +6 more sources

Towards Development of a Real-Time Point Feature Quality Assessment Method for Volunteered Geographic Information Using the Internet of Things

ISPRS International Journal of Geo-Information, 2021
One of the most important challenges of volunteered geographic information (VGI) is the quality assessment. Existing methods of VGI quality assessment, either assess the quality by comparing a reference map with the VGI map or deriving the quality from ...
Sepehr Honarparvar, Mohammad Reza Malek, Sara Saeedi, Steve Liang   +3 more
doaj   +1 more source

Applicability Analysis and Ensemble Application of BERT with TF-IDF, TextRank, MMR, and LDA for Topic Classification Based on Flood-Related VGI

ISPRS Int. J. Geo Inf., 2023
Volunteered geographic information (VGI) plays an increasingly crucial role in flash floods. However, topic classification and spatiotemporal analysis are complicated by the various expressions and lengths of social media textual data.
Wenying Du, Chang Ge, Shuang Yao, Nengcheng Chen, Lei Xu   +4 more
semanticscholar   +1 more source

Volunteered Geographic Information (VGI) in Spatial Data Infrastructure (SDI) Continuum

EAI Endorsed Transactions on Internet of Things, 2023
Spatial data infrastructure (SDI) is a system that supports the management and use of geospatial data and related resources. It involves the creation and maintenance of a network of organizations, people, and technology that enables the sharing of ...
K. Shahi
semanticscholar   +1 more source

Validating the Quality of Volunteered Geographic Information (VGI) for Flood Modeling of Hurricane Harvey in Houston, Texas

Hydrology, 2023
The primary objective of this study was to examine the quality of volunteered geographic information (VGI) data for flood mapping of Hurricane Harvey. As a crowdsourcing platform, the U-Flood project mapped flooded streets in the Houston metro area. This
T. E. Chow, Joyce Chien, K. Meitzen
semanticscholar   +1 more source

Using gamification to increase map data production during humanitarian volunteered geographic information (VGI) campaigns

Cartography and Geographic Information Science, 2023
Volunteered geographic information (VGI) offers a solution to inequalities in authoritative map data that can limit our response to humanitarian crises. However, sustaining voluntary contributions of map data can be difficult and hybrid machine learning ...
Kirsty Watkinson, Jonathan J. Huck, Angela Harris   +2 more
semanticscholar   +1 more source

VGI FOR LAND ADMINISTRATION – A QUALITY PERSPECTIVE [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2013
Abstract. Since the use of volunteered geographic information (VGI) or crowd sourced data (Goodchild, 2007) became more common, several people proposed the use of such methods of data collection for various fields. Success stories were Wikipedia encyclopaedia and OpenStreetMap (OSM), but also using VGI in land administration has been proposed.
Gerhard Navratil, Andrew U. Frank
openalex   +5 more sources