Results 21 to 30 of about 632,003 (285)

Three-Dimensional Indoor Fire Evacuation Routing

open access: yesISPRS International Journal of Geo-Information, 2020
Traditional indoor navigation algorithms generally only consider the geometrical information of indoor space. However, the environmental information and semantic parameters of a fire are also important for evacuation routing in the case of a fire.
Yan Zhou   +3 more
doaj   +1 more source

INDOOR POSITIONING AND NAVIGATION BASED ON QR CODE MAP [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023
Solving the indoor positioning problem can effectively improve work and life efficiency. Outdoors, navigation and positioning mainly rely on satellites to provide global positioning and road network topology to constrain the direction of travel ...
R. K. Liu   +3 more
doaj   +1 more source

Introducing Building Indoor Topology Model (BITM) to Store Indoor Topology and Supporting Semantic Objects for Indoor Navigation [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Indoor navigation models are a key part of indoor navigation systems, especially in microscale routing. Nowadays, indoor navigation approaches are using semantic information to extract indoor navigation graphs. However, the current algorithms suffer from
J. Sadidi, Z. Joudaki, H. Rezayan
doaj   +1 more source

Spatial models for context-aware indoor navigation systems: A survey [PDF]

open access: yes, 2012
This paper surveys indoor spatial models developed for research fields ranging from mobile robot mapping, to indoor location-based services (LBS), and most recently to context-aware navigation services applied to indoor environments.
Christophe Claramunt   +6 more
core   +1 more source

Defining a Model for Integrating Indoor and Outdoor Network Data to Support Seamless Navigation Applications

open access: yesISPRS International Journal of Geo-Information, 2021
Spaces are continuous realms where human beings freely navigate, such as from indoor to outdoor and optionally to another indoor space. However, currently available data models to represent space for navigation do not entirely reflect this continuity of ...
Alexis Richard C. Claridades   +1 more
doaj   +1 more source

SEAMLESS NAVIGATION USING VARIOUS SENSORS: AN OVERVIEW OF THE SEAMLESS NAVIGATION CAMPAIGN [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
Seamless positioning techniques in indoor and outdoor environments are necessary for obtaining sensor locations. However, no definitive indoor-outdoor navigation system simultaneously provides high accuracy, high availability and low installation cost ...
M. Nakagawa   +7 more
doaj   +1 more source

Automatic Construction of Indoor 3D Navigation Graph from Crowdsourcing Trajectories

open access: yesISPRS International Journal of Geo-Information, 2021
Lacking indoor navigation graph has become a bottleneck in indoor applications and services. This paper presents a novel automated indoor navigation graph reconstruction approach from large-scale low-frequency indoor trajectories without any other data ...
Xin Fu, Hengcai Zhang, Peixiao Wang
doaj   +1 more source

A FASTER R-CNN APPROACH FOR EXTRACTING INDOOR NAVIGATION GRAPH FROM BUILDING DESIGNS [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019
The indoor navigation graph is crucial for emergency evacuation and route guidance. However, most of existing solutions are limited to the tedious manual solutions and inefficient automatic solutions of the indoor building designs.
L. Niu, Y. Q. Song
doaj   +1 more source

BIM-BASED INDOOR PATH PLANNING CONSIDERING OBSTACLES [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017
At present, 87 % of people’s activities are in indoor environment; indoor navigation has become a research issue. As the building structures for people’s daily life are more and more complex, many obstacles influence humans’ moving.
M. Xu   +12 more
doaj   +1 more source

Indoor geolocation for wireless networks [PDF]

open access: yes, 2011
An ever growing demand for ‘location based services’ and the unprecedented growth of wireless local area networks (WLAN) has, in the past few years, attracted the focus of the research community to investigate and develop accurate indoor geolocation ...
Ali, Shahid
core   +7 more sources

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