Journal of Location Based Services最新文献_第7页

Crowdsourced hotspot validation and data visualisation for location-based haze mitigation 基于位置的雾霾缓解的众包热点验证和数据可视化

IF 2.3

Journal of Location Based Services Pub Date : 2019-06-21 DOI: 10.1080/17489725.2019.1619851

T. Aditya, Dany Laksono, Nur Izzahuddin

{"title":"Crowdsourced hotspot validation and data visualisation for location-based haze mitigation","authors":"T. Aditya, Dany Laksono, Nur Izzahuddin","doi":"10.1080/17489725.2019.1619851","DOIUrl":"https://doi.org/10.1080/17489725.2019.1619851","url":null,"abstract":"ABSTRACT Haze over Sumatera and Kalimantan has been a prolonged trans-boundary issue in South East Asia mainly due to setting fire to drained peatland. At present, fire sources (i.e. hotspots) are located based on satellite data. Sensors such as MODIS and AVHRR detect extremes in average temperatures of an area. The hotspots have low spatial resolution and large spatial footprints, thus making it harder to detect fires. This research proposed a ground-based spatial validation of satellite data based on crowdsourcing in order to obtain more accurate estimates of the location and severity of the fire. We developed an Android application for reporting and validating fires in peatlands. Crowd data collected were integrated with satellite hotspot data by the dashboard system as a monitoring platform for government agencies. The 110,888 hectares of Padang Island, in Riau Province, were chosen as the study area given its vulnerability to peatland fire and imminent danger of subsidence as the collateral effect of draining peatlands. Residents of Padang Island tested the use-case scenario of the app to assess its applicability. The study showed the potential use of mobile apps for local communities to help the government validate hotspots for haze mitigation.","PeriodicalId":44932,"journal":{"name":"Journal of Location Based Services","volume":"13 1","pages":"239 - 269"},"PeriodicalIF":2.3,"publicationDate":"2019-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17489725.2019.1619851","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48797243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

A novel dynamic localisation system for indoor and outdoor tracking 一种用于室内和室外跟踪的动态定位系统

IF 2.3

Journal of Location Based Services Pub Date : 2019-06-10 DOI: 10.1080/17489725.2019.1606459

T. Hooi, H. L. Khoo, R. Komiya

{"title":"A novel dynamic localisation system for indoor and outdoor tracking","authors":"T. Hooi, H. L. Khoo, R. Komiya","doi":"10.1080/17489725.2019.1606459","DOIUrl":"https://doi.org/10.1080/17489725.2019.1606459","url":null,"abstract":"ABSTRACT Hybrid indoor and outdoor localisation system has generated substantial interest from researchers due to its potential use in many fields. Many research papers on hybrid localisation were focused on localisation accuracy and computation time instead of the process for seamless switching during the subject’s indoor-outdoor movement. Seamless and stable switching can improve the usability and practicality of a system in an ever-changing scenario. This paper presents a hybrid localisation system that can adapt to the changes in the environment. Two hybrid systems – Enhanced Fusion Hybrid (EFH) and Enhanced Unified Hybrid (EUH), and novel signal selection and switching algorithms suitable for dynamic environment where signal fluctuations and transient condition frequently occur, i.e. the Clean Radio Signal Label (CRSL) classification algorithm and the Adaptive Signal Thresholding (AST) algorithm are proposed. From the experimental results of EFH and EUH methods, the GPS and Wi-Fi combination produces the best results as compared to the combinations of GPS and GSM or GSM and Wi-Fi. The accuracy of estimates was improved to 2.0 m to 5.0 m. Further work shown that an accuracy of 2.0 m or less could be achieved with an increase in Wi-Fi nodes from three to four for the system.","PeriodicalId":44932,"journal":{"name":"Journal of Location Based Services","volume":"13 1","pages":"178 - 212"},"PeriodicalIF":2.3,"publicationDate":"2019-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17489725.2019.1606459","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43058235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Applying user-centred design for smartwatch-based pedestrian navigation system 基于智能手表的行人导航系统以用户为中心的设计

IF 2.3

Journal of Location Based Services Pub Date : 2019-05-17 DOI: 10.1080/17489725.2019.1610582

Martin Perebner, Haosheng Huang, G. Gartner

引用次数: 16

Understanding the relationship between complicated crossings and frequently visited locations – a case study with boro taxis in Manhattan 了解复杂的十字路口和经常光顾的地点之间的关系——以曼哈顿博罗出租车为例

IF 2.3

Journal of Location Based Services Pub Date : 2019-03-26 DOI: 10.1080/17489725.2019.1588406

A. Keler, J. Krisp

{"title":"Understanding the relationship between complicated crossings and frequently visited locations – a case study with boro taxis in Manhattan","authors":"A. Keler, J. Krisp","doi":"10.1080/17489725.2019.1588406","DOIUrl":"https://doi.org/10.1080/17489725.2019.1588406","url":null,"abstract":"ABSTRACT Urban mobility has complex patterns and principles. Data of moving entities on the underlying transportation infrastructure can help understanding those complex patterns and principles. Therefore, we need static infrastructural information and knowledge on spatio-temporal movement patterns of public transport services and of various vehicle fleets. We focus on inspecting data partitions of individual taxi movement acquisitions in New York City (NYC), together with OpenStreetMap (OSM) data extracts, for gaining more knowledge about the complex daily mobility patterns in NYC. We select trip information of tracked boro taxi drivers, who are restricted to pick up customers at the airports and the southern part of Manhattan. By computing with taxi customer drop-off positions, we define drop-off clusters as the customer destination hotspots of selected Saturdays in June 2015. These hotspots are then related to the OSM road network, in particular to its derivatives: complicated crossings. By comparing with a previous assumption of detecting ‘fast leaving’ behaviour within the restricted zone, we receive characteristic matching results: only few destination hotspots appear at complicated crossings. Nearly all the matching intersections have nearby situated pedestrian zones and many are associated with previous construction measures. Finally, we reason on the usefulness of the proposed method.","PeriodicalId":44932,"journal":{"name":"Journal of Location Based Services","volume":"13 1","pages":"159 - 177"},"PeriodicalIF":2.3,"publicationDate":"2019-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17489725.2019.1588406","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49603387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Approaching location-based services from a place-based perspective: from data to services? 从基于地点的角度看待基于位置的服务:从数据到服务?

IF 2.3

Journal of Location Based Services Pub Date : 2019-01-23 DOI: 10.1080/17489725.2018.1564383

Azam R. Bahrehdar, Olga Koblet, R. Purves

{"title":"Approaching location-based services from a place-based perspective: from data to services?","authors":"Azam R. Bahrehdar, Olga Koblet, R. Purves","doi":"10.1080/17489725.2018.1564383","DOIUrl":"https://doi.org/10.1080/17489725.2018.1564383","url":null,"abstract":"ABSTRACT Despite the seemingly obvious importance of a link between notions of place and the provision of context in location-based services (LBS), truly place-based LBS remain rare. Place is attractive as a concept for designing services as it focuses on ways in which people, rather than machines, represent and talk about places. We review papers which have extracted place-relevant information from a variety of sources, examining their rationales, the data sources used, the characteristics of the data under study and the ways in which place is represented. Although the data sources used are subject to a wide range of biases, we find that existing methods and data sources are capable of extracting a wide range of place-related information. We suggest categories of LBS which could profit from such information, for example, by using place-related natural language (e.g. vernacular placenames) in tracking and routing services and moving the focus from geometry to place semantics in location-based retrieval. A key future challenge will be to integrate data derived from multiple sources if we are to advance from individual case studies focusing on a single aspect of place to services which can deal with multiple aspects of place.","PeriodicalId":44932,"journal":{"name":"Journal of Location Based Services","volume":"13 1","pages":"73 - 93"},"PeriodicalIF":2.3,"publicationDate":"2019-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17489725.2018.1564383","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46147952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Drone services: issues in drones for location-based services from human-drone interaction to information processing 无人机服务:从人机交互到信息处理，无人机定位服务存在的问题

IF 2.3

Journal of Location Based Services Pub Date : 2019-01-16 DOI: 10.1080/17489725.2018.1564845

Majed M. Alwateer, S. Loke, A. Zuchowicz

{"title":"Drone services: issues in drones for location-based services from human-drone interaction to information processing","authors":"Majed M. Alwateer, S. Loke, A. Zuchowicz","doi":"10.1080/17489725.2018.1564845","DOIUrl":"https://doi.org/10.1080/17489725.2018.1564845","url":null,"abstract":"ABSTRACT Recently, drones (or unmanned aerial vehicles (UAVs)) are getting increasing attention and taking mobile computing to a new era. Due to the support of highly advanced technologies, soon they might be ubiquitous and networks of drones might be used in providing civilian drone services. In this paper, we provide a survey of drone services and applications, data management for drones, data services using drones, distributed computing trends fuelled by drones and a range of human-drone interaction research which is useful if drones are to regularly serve non-technical users, while highlighting the specific concerns in data management and airborne Internet-of-Things (IoT) computing infrastructure. We present concepts such as drones-as-a-service and fly-in, fly-out computing infrastructure, and note data management and system design issues that arise in these situations. Issues of Big Data arising from such applications, optimising the configuration of airborne and ground infrastructure to provide the best QoS and QoE, situation-awareness, scalability, reliability, scheduling for efficiency, interaction with users and drones using different methods are noted.","PeriodicalId":44932,"journal":{"name":"Journal of Location Based Services","volume":"13 1","pages":"127 - 94"},"PeriodicalIF":2.3,"publicationDate":"2019-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17489725.2018.1564845","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45101447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 44

Modified Jaccard index analysis and adaptive feature selection for location fingerprinting with limited computational complexity 有限计算复杂度的位置指纹的改进Jaccard索引分析和自适应特征选择

IF 2.3

Journal of Location Based Services Pub Date : 2019-01-10 DOI: 10.1080/17489725.2019.1577505

Caifa Zhou, A. Wieser

{"title":"Modified Jaccard index analysis and adaptive feature selection for location fingerprinting with limited computational complexity","authors":"Caifa Zhou, A. Wieser","doi":"10.1080/17489725.2019.1577505","DOIUrl":"https://doi.org/10.1080/17489725.2019.1577505","url":null,"abstract":"ABSTRACT We propose an approach for fingerprinting-based positioning which reduces the data requirements and computational complexity of the online positioning stage. It is based on a segmentation of the entire region of interest into subregions, identification of candidate subregions during the online-stage, and position estimation using a preselected subset of relevant features. The subregion selection uses a modified Jaccard which quantifies the similarity between the features observed by the user and those available within the reference fingerprint map. The adaptive feature selection is achieved using an adaptive forward-backward greedy search which determines a subset of features for each subregion, relevant with respect to a given fingerprinting-based positioning method. In an empirical study using signals of opportunity for fingerprinting the proposed subregion and feature selection reduce the processing time during the online-stage by a factor of about 10 while the positioning accuracy does not deteriorate significantly. In fact, in one of the two study cases, the 90th percentile of the circular error increased by 7.5% while in the other study case we even found a reduction of the corresponding circular error by 30%.","PeriodicalId":44932,"journal":{"name":"Journal of Location Based Services","volume":"13 1","pages":"128 - 157"},"PeriodicalIF":2.3,"publicationDate":"2019-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17489725.2019.1577505","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44458922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

A comparative analysis of perceived and actual walking behaviour in varying land use and time 在不同土地使用和时间下感知和实际步行行为的比较分析

IF 2.3

Journal of Location Based Services Pub Date : 2019-01-02 DOI: 10.1080/17489725.2018.1563308

L. S. C. Pun-Cheng, C. Y. So

{"title":"A comparative analysis of perceived and actual walking behaviour in varying land use and time","authors":"L. S. C. Pun-Cheng, C. Y. So","doi":"10.1080/17489725.2018.1563308","DOIUrl":"https://doi.org/10.1080/17489725.2018.1563308","url":null,"abstract":"ABSTRACT It is widely recognised that walking can bring about a host of health benefits. In order to encourage more walking, raising the walkability of pedestrian paths is one option. Studies in the past have taken on this subject but have only focused on a single variable only. By using a questionnaire to identify a pedestrian’s perception of the key variables of walkability and a map survey to explore his/her actual choice of paths in two different districts (residential and commercial) in Hong Kong, this study establishes an integrated picture covering several key variables affecting walkability. A qualitative analysis shows that most generally and individually perceived as preferred safe and comfortable walking environmental variables may not be reflected in actual walking behaviour, especially in a busy working district. As such, if walking is to be promoted, the government may consider increasing the greenness and width of walkways while navigation tools, which currently focus mainly on distance and time, can further be improved to include more behavioural variables.","PeriodicalId":44932,"journal":{"name":"Journal of Location Based Services","volume":"13 1","pages":"53 - 72"},"PeriodicalIF":2.3,"publicationDate":"2019-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17489725.2018.1563308","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44163211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Risk perception during urban cycling in volunteered geographic information and in the lab: effects of the vista space’s spatial properties 自愿地理信息和实验室中城市骑行过程中的风险感知：远景空间空间特性的影响

IF 2.3

Journal of Location Based Services Pub Date : 2018-12-03 DOI: 10.1080/17489725.2018.1552797

R. Stülpnagel, Konstantin Schmid

{"title":"Risk perception during urban cycling in volunteered geographic information and in the lab: effects of the vista space’s spatial properties","authors":"R. Stülpnagel, Konstantin Schmid","doi":"10.1080/17489725.2018.1552797","DOIUrl":"https://doi.org/10.1080/17489725.2018.1552797","url":null,"abstract":"ABSTRACT A wide range of factors affects risk perception during urban cycling. In this research, we investigate a factor so far not addressed: the spatial configuration of the vista space; with the underlying reasoning that more complex or rapidly changing vista spaces are perceived as more dangerous. We present a method to quantify a vista space’s spatial configuration by generating highly precise isovists based on laser scans. We test our assumptions in a lab-based study, where participants rate the perceived risk for cycling in various image sequences displaying complex traffic situations. The tested traffic situations are selected from a project collecting citizens’ reports about urban cycling risks. Our findings support the hypothesis that the spatial configuration of the vista space is a highly relevant factor for risk perception which deserves further investigation. Further analyses imply that volunteered geographic information on subjective topics such as risk perception may be of limited accuracy, but is likely to be representative for a larger population.","PeriodicalId":44932,"journal":{"name":"Journal of Location Based Services","volume":"13 1","pages":"1 - 24"},"PeriodicalIF":2.3,"publicationDate":"2018-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17489725.2018.1552797","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45258773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

A RSS-based localization method using HMM-based error correction 基于HMM纠错的RSS定位方法

IF 2.3

Journal of Location Based Services Pub Date : 2018-10-02 DOI: 10.1080/17489725.2018.1535140

Ahmad Alabadleh, Saqer Aljaafreh, A. Aljaafreh, K. Alawasa

引用次数: 12