Results 71 to 80 of about 17,825 (204)

Inverse problems for general second order hyperbolic equations with time-dependent coefficients [PDF]

open access: yes, 2017
We study the inverse problems for the second order hyperbolic equations of general form with time-dependent coefficients assuming that the boundary data are given on a part of the boundary.
Eskin, Gregory
core   +2 more sources

Are crowdsourced datasets suitable for specialized routing services? Case study of Openstreetmap for routing of people with limited mobility [PDF]

open access: yes, 2017
Nowadays, Volunteered Geographic Information (VGI) has increasingly gained attractiveness to both amateur users and professionals. Using data generated from the crowd has become a hot topic for several application domains including transportation ...
Ali, Ahmed Loai   +3 more
core   +3 more sources

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

open access: yesTransactions 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

Traffic Regulator Detection and Identification from Crowdsourced Data—A Systematic Literature Review

open access: yesISPRS International Journal of Geo-Information, 2019
Mapping with surveying equipment is a time-consuming and cost-intensive procedure that makes the frequent map updating unaffordable. In the last few years, much research has focused on eliminating such problems by counting on crowdsourced data, such as ...
Stefania Zourlidou, Monika Sester
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

open access: yesClinical 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   +2 more
wiley   +1 more source

New Zealand Geological Timescale 2025

open access: yesNew 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   +13 more
wiley   +1 more source

Introduction to social sensing and big data computing for disaster management

open access: yesInternational Journal of Digital Earth, 2019
Traditional data collection methods such as remote sensing and field surveying often fail to offer timely information during or immediately following disaster events.
Zhenlong Li   +2 more
doaj   +1 more source

Querying VGI by semantic enrichment

open access: yes, 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
Lemmens, Rob   +4 more
openaire   +4 more sources

Geographic-Aware Augmented Reality for VGI [PDF]

open access: yesAdvances in Cartography and GIScience of the ICA, 2019
Abstract. Volunteered Geographic Information (VGI) has been a constantly growing field over the last decade, but the utilised technologies (i.e., mobile phones) are not able to exploit the full potential concerning effort and accuracy of registering geographic data.
Fogliaroni, Paolo   +3 more
openaire   +2 more sources

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