Results 71 to 80 of about 2,365 (174)

Unpacking the role of volunteered geographic information in disaster management: focus on data quality

Geomatics, Natural Hazards & Risk
The increasing occurrence of disasters worldwide has motivated researchers to continuously evaluate potential technological advances to support disaster management (DM) as well as emergency response. The advent of Volunteered Geographic Information (VGI)
Marina Tavra, Anka Lisec, Morena Galešić Divić, Vlado Cetl   +3 more
doaj   +1 more source

Sources of VGI for Mapping

, 2017
The concept of Volunteered Geographic Information (VGI) is often exemplified by the mapping of features in OpenStreetMap (OSM), yet there are many other sources of VGI available. Some VGI is very focused on the creation of map-based products, while in other applications location is simply one attribute that is routinely collected, due to the ...
Linda See, Jacinto Estima, Andrea Pődör, Jamal Jokar Arsanjani, Juan-Carlos Laso Bayas, Rumiana Vatseva   +5 more
openaire   +3 more sources

Volunteered and crowdsourced geographic information: the OpenStreetMap project

Journal of Spatial Information Science, 2020
Advancements in technology over the last two decades have changed how spatial data are created and used. In particular, in the last decade, volunteered geographic information (VGI), i.e., the crowdsourcing of geographic information, has revolutionized ...
Michela Bertolotto, Gavin McArdle, Bianca Schoen-Phelan   +2 more
doaj   +1 more source

Machine Learning Classification of AI‐Generated and Human‐Mapped Buildings in OpenStreetMap Using Morphometric Analysis

Transactions in GIS, Volume 30, Issue 2, April 2026.
ABSTRACT The proliferation of AI‐generated building footprints in OpenStreetMap (OSM) has transformed crowdsourced mapping, yet the geometric characteristics associated with different digitization methods remain poorly understood. This study presents a comprehensive morphometric analysis of more than 9 million building footprints across 15 ...
Abdulkadir Memduhoğlu
wiley   +1 more source

Evaluating the quality of VGI and authoritative data in red-crowned crane conservation: a comparative study

Big Earth Data
Volunteered Geographic Information (VGI) has emerged as a valuable resource in citizen science, yet concerns about its data quality remain. While prior studies have focused on specific data types or platforms, few have systematically evaluated ...
Yibin Gao, Jie Jin, Siqin Wang
doaj   +1 more source

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

The 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

Nonsurgical Endodontic Retreatment of a Large Cyst‐Like Periapical Lesion With Buccal and Palatal Cortical Plate Perforations and Maxillary Sinus Involvement: A 2‐Year CBCT Follow‐Up Case Report

Clinical Case Reports, Volume 14, Issue 3, March 2026.
ABSTRACT Large cyst‐like periapical radiolucencies with cortical perforations are traditionally managed surgically. However, nonsurgical retreatment may be effective when adequate disinfection and seal are achieved. This case report describes the management of a large maxillary periapical lesion involving five endodontically treated teeth (from 21 to ...
Mohamed Ahmed Elsayed, Nawar Naguib Nawar, Mohmed Isaqali Karobari   +2 more
wiley   +1 more source

New Zealand Geological Timescale 2025

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 1, March 2026.
New Zealand Geological Timescale 2025 (NZGT 2025) is the first comprehensive update and revision of the New Zealand Geological Timescale in a decade. The criteria used to establish age ranges of New Zealand Stages within the NZGT have been reviewed, calibrated, and revised where required against the 2023/04 International Chronostratigraphic Chart and ...
Christopher D. Clowes, James S. Crampton, Kyle J. Bland, J. Ian Raine, Andrew F. Boyes, Hamish J. Campbell, Erica M. Crouch, Martin P. Crundwell, Neville Hudson, Elizabeth M. Kennedy, Donald A. B. MacFarlan, Hugh E. G. Morgans, Marcus D. Richards, Matthew W. Sagar   +13 more
wiley   +1 more source

quando una GSDI Conference in Italia? Insieme è possibile!

GEOmedia, 2009
When a GSDI Conference in Italy? Together it's possible The collaboration between web log authors and GEOmedia may help "neo" and "paleo" geographers (following the neologisms introduced by Ed Parsons) to have a long-lasting dialogue.
Sergio Farrugia
doaj  

Implicit Third‐Order Peer Triplets with Variable Stepsizes for Gradient‐Based Solutions in Large‐Scale ODE‐Constrained Optimal Control

Optimal Control Applications and Methods, Volume 47, Issue 2, Page 570-588, March/April 2026.
Implicit third‐order Peer two‐step methods that are superconvergent for variable stepsizes have the potential to significantly improve the efficiency of solving large‐scale ODE‐constrained optimal control problems. These include real‐world applications in medical treatment planning for prostate cancer, such as the design of effective three‐dose drug ...
Jens Lang, Bernhard A. Schmitt
wiley   +1 more source