Journal of Location Based Services最新文献_第8页

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":null,"pages":null},"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":null,"pages":null},"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":null,"pages":null},"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":null,"pages":null},"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

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":null,"pages":null},"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

Learning indoor space perception 学习室内空间感知

IF 2.3

Journal of Location Based Services Pub Date : 2018-10-02 DOI: 10.1080/17489725.2018.1539255

Andreas Sedlmeier, Sebastian Feld

{"title":"Learning indoor space perception","authors":"Andreas Sedlmeier, Sebastian Feld","doi":"10.1080/17489725.2018.1539255","DOIUrl":"https://doi.org/10.1080/17489725.2018.1539255","url":null,"abstract":"ABSTRACT Human perception of location and space forms the basis upon which the interaction with location-based services (LBS) takes place. Our work aims to develop a shared awareness and common understanding of location and space,between machines and their users by building upon research into the numerical representation of the visual perception of space. Different structures in buildings like rooms, hallways and doorways form different, corresponding patterns in these representations. Thanks to recent advances in the field of deep learning with neural networks, it now seems possible to explore the idea of automatically learning these recurring structures. This article presents a complete framework: starting from the collection of isovist measures along geospatial trajectories on indoor floor plans,over statistical data analysis, the unsupervised extraction of meaningful structure, up to the training of models that generalize to different environments. We show that isovist measures do reflect the recurring structures found in different buildings, that these recurring patterns are encoded in the data in a way that unsupervised machine learning can identify them andthat the identified structures are meaningful as they represent human relatable concepts.Furthermore, we propose to use cluster similarity analysis as a promising concept for quantifying visual perception similarity.","PeriodicalId":44932,"journal":{"name":"Journal of Location Based Services","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2018-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17489725.2018.1539255","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41676621","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

Exploring the limits of PDR-based indoor localisation systems under realistic conditions 探索基于pdr的室内定位系统在现实条件下的局限性

IF 2.3

Journal of Location Based Services Pub Date : 2018-10-02 DOI: 10.1080/17489725.2018.1541330

Robert Jackermeier, Bernd Ludwig

{"title":"Exploring the limits of PDR-based indoor localisation systems under realistic conditions","authors":"Robert Jackermeier, Bernd Ludwig","doi":"10.1080/17489725.2018.1541330","DOIUrl":"https://doi.org/10.1080/17489725.2018.1541330","url":null,"abstract":"ABSTRACT Pedestrian Dead Reckoning (PDR) plays an important role in many (hybrid) indoor positioning systems since it enables frequent, granular position updates. However, the accumulation of errors creates a need for external error correction. In this work, we explore the limits of PDR under realistic conditions using our graph-based system as an example. For this purpose, we collect sensor data while the user performs an actual navigation task using a navigation application on a smartphone. To assess the localisation performance, we introduce a task-oriented metric based on the idea of landmark navigation: instead of specifying the error metrically, we measure the ability to determine the correct segment of an indoor route, which in turn enables the navigation system to give correct instructions. We conduct offline simulations with the collected data in order to identify situations where position tracking fails and explore different options how to mitigate the issues, for example through detection of special features along the user’s path or through additional sensors. Our results show that the magnetic compass is often unreliable under realistic conditions and that resetting the position at strategically chosen decision points significantly improves positioning accuracy.","PeriodicalId":44932,"journal":{"name":"Journal of Location Based Services","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2018-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17489725.2018.1541330","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46559626","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

Spatio-temporal analysis of meta-data semantics of market shares over large public geosocial media data 大型公共地理社会媒体数据上市场份额元数据语义的时空分析

IF 2.3

Journal of Location Based Services Pub Date : 2018-10-02 DOI: 10.1080/17489725.2018.1547428

Abdulaziz Almaslukh, A. Magdy, Sergio J. Rey

{"title":"Spatio-temporal analysis of meta-data semantics of market shares over large public geosocial media data","authors":"Abdulaziz Almaslukh, A. Magdy, Sergio J. Rey","doi":"10.1080/17489725.2018.1547428","DOIUrl":"https://doi.org/10.1080/17489725.2018.1547428","url":null,"abstract":"ABSTRACT Monitoring market share changes over space and time is an essential and continuous task for commercial companies and their third-party local agents to adjust their sale campaigns and marketing efforts for profit maximisation. This paper uses social media data as a cheap and up-to-date source to reveal the implicit semantics that are embedded in the meta-data of public geosocial datasets. We use Twitter data as a prime example of rich geosocial data. These data are associated with several meta-data attributes. Using this meta-data, we perform a geospatial analysis for the source platform from which a tweet is posted, e.g. from Apple or Android device. Our analysis studies all counties in US connected states over 2 years 2016–2017. We show that market structure at the national level masks substantial variation at the county scale. Moreover, we find strong spatial autocorrelation in platform distribution and market share in the US. In addition, we show interesting changes over the 2 years that motivates further analysis at different spatial and temporal levels. Our results are supported with visual maps of location quotients and market dominance, in addition to formal test results of spatial autocorrelation, and spatial Markov analysis.","PeriodicalId":44932,"journal":{"name":"Journal of Location Based Services","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2018-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17489725.2018.1547428","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46447692","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: 2