Results 91 to 100 of about 19,818 (257)

IMPROVING VOLUNTEERED GEOGRAPHIC DATA QUALITY USING SEMANTIC SIMILARITY MEASUREMENTS [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2013
Studies have analysed the quality of volunteered geographic information (VGI) datasets, assessing the positional accuracy of features and the completeness of specific attributes.
A. Vandecasteele, R. Devillers
doaj   +1 more source

Flood Damage Evaluation for Buildings in a Small Island Developing State

open access: yesWater Resources Research, Volume 61, Issue 9, September 2025.
Abstract Flooding poses significant social and economic challenges for Small Island Developing States (SIDS). Despite frequent and damaging flood events, SIDS are underrepresented among global flood damage models. This study evaluated tree‐based learning algorithm performance for building damage prediction, using a new data set from 2012 Tropical ...
Ryan Paulik   +2 more
wiley   +1 more source

From Sensor to Observation Web with Environmental Enablers in the Future Internet [PDF]

open access: yes, 2011
This paper outlines the grand challenges in global sustainability research and the objectives of the FP7 Future Internet PPP program within the Digital Agenda for Europe. Large user communities are generating significant amounts of valuable environmental
Berre, Arene J.   +6 more
core   +3 more sources

Experiences with Citizen-Sourced VGI in Challenging Circumstances [PDF]

open access: yesISPRS International Journal of Geo-Information, 2017
The article explores the process of Volunteered Geographic Information (VGI) collection by assessing the relative usability and accuracy of a range of different methods (smartphone GPS, tablet, and analogue maps) for data collection among different demographic and educational groups, and in different geographical contexts within a study area ...
Hameed M, Fairbairn D, Speak S
openaire   +4 more sources

Magnetoconductance oscillations in quasiballistic multimode nanowires

open access: yes, 2007
We calculate the conductance of quasi-one-dimensional nanowires with electronic states confined to a surface charge layer, in the presence of a uniform magnetic field.
B. L. Al’tshuler   +5 more
core   +1 more source

Gravitational depolarization of ultracold neutrons: comparison with data [PDF]

open access: yes, 2015
We compare the expected effects of so-called gravitationally enhanced depolarization of ultracold neutrons to measurements carried out in a spin-precession chamber exposed to a variety of vertical magnetic-field gradients.
A. Kozela   +51 more
core   +3 more sources

Semantic Interoperability of Sensor Data with Volunteered Geographic Information: A Unified Model

open access: yesISPRS International Journal of Geo-Information, 2013
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)
Jamal Jokar Arsanjani   +3 more
doaj   +1 more source

Leveraging User‐Generated Spatial Content for Urban Crime Analysis: A Data‐Driven Approach

open access: yesTransactions in GIS, Volume 29, Issue 5, August 2025.
ABSTRACT Street crimes in urban areas are influenced by the physical characteristics and built environment of a city, including road networks, visibility, lighting, and land use distribution. Traditionally, authorized data sources such as city maps have been used to investigate these urban form parameters. However, with advancements in technology, user‐
Mohammad Hadi Ahmadi, Mohammad Taleai
wiley   +1 more source

A Proximity-Based Semantic Enrichment Approach of Volunteered Geographic Information: A Study Case of Waste of Water

open access: yesInformation, 2019
Volunteered geographic information (VGI) refers to geospatial data that is collected and/or shared voluntarily over the Internet. Its use, however, presents many limitations, such as data quality, difficulty in use and recovery.
Liliane Soares da Costa   +3 more
doaj   +1 more source

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