GEOCROWD '12最新文献

Matching geo-spatial information by qualitative spatial relations 通过定性空间关系匹配地理空间信息

GEOCROWD '12 Pub Date : 2012-11-06 DOI: 10.1145/2442952.2442960

R. Al-Salman, F. Dylla, P. Fogliaroni

引用次数: 11

Analysis of user mobility data sources for multi-user context modeling 针对多用户上下文建模的用户移动性数据源分析

GEOCROWD '12 Pub Date : 2012-11-06 DOI: 10.1145/2442952.2442955

Paras Mehta, A. Voisard

引用次数: 3

wq: a modular framework for collecting, storing, and utilizing experiential VGI wq:用于收集、存储和使用体验式VGI的模块化框架

GEOCROWD '12 Pub Date : 2012-11-06 DOI: 10.1145/2442952.2442964

S. Sheppard

{"title":"wq: a modular framework for collecting, storing, and utilizing experiential VGI","authors":"S. Sheppard","doi":"10.1145/2442952.2442964","DOIUrl":"https://doi.org/10.1145/2442952.2442964","url":null,"abstract":"We present \"wq\", an open-source framework for developing robust applications allowing volunteers to collect geographic information (VGI) in the field. Successful VGI applications been deployed in various contexts, but much of the effort that is put into common programming tasks cannot be re-used, often because the application code is too closely tied to the problem domain. User-friendly campaign authoring tools are being explored as ways to facilitate the rapid deployment of VGI applications, but many of these tools necessarily enforce a restricted vocabulary of interface elements and database models, limiting their usefulness for more complex VGI project workflows. In contrast, we propose a highly modular, open-source approach that enables reuse of general-purpose components created to facilitate common design patterns -- without enforcing any hard limitations on the database model or interface. The framework builds off of and extends numerous existing open-source projects and leverages open standards (e.g. HTML5), which means it will work across all popular mobile devices as well as desktop browsers. The ideas behind wq arose from our ongoing efforts to generalize an existing data collection application initially created for community-based stream quality monitoring. In this paper we justify the design decisions made in creating wq and suggest general principles that should be taken into consideration when designing systems for collecting, storing, and utilizing VGI.","PeriodicalId":132038,"journal":{"name":"GEOCROWD '12","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127262016","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: 23

How people describe their place: identifying predominant types of place descriptions 人们如何描述他们的地方:识别主要的地方描述类型

GEOCROWD '12 Pub Date : 2012-11-06 DOI: 10.1145/2442952.2442959

D. Richter, S. Winter, Kai-Florian Richter, Lesley Stirling

引用次数: 17

A semantic web based gazetteer model for VGI 基于语义网的VGI地名词典模型

GEOCROWD '12 Pub Date : 2012-11-06 DOI: 10.1145/2442952.2442962

K. Beard

引用次数: 7

Models for professional cyclic activities in VGI with a case in coffee farming VGI专业循环活动模型，以咖啡种植为例

GEOCROWD '12 Pub Date : 2012-11-06 DOI: 10.1145/2442952.2442965

C. Kagoyire, R. A. By

{"title":"Models for professional cyclic activities in VGI with a case in coffee farming","authors":"C. Kagoyire, R. A. By","doi":"10.1145/2442952.2442965","DOIUrl":"https://doi.org/10.1145/2442952.2442965","url":null,"abstract":"We argue that an important class of applications of volunteered geographic information is that of professionals reporting on their work, where they did, and how the job was carried out. This is especially useful in the case where those professionals struggle to make a living, as in sub-Saharan agriculture. Conditions in non-mechanised agriculture are highly variable, and 'the local farmer' often operates with non-formalised but specialist understanding of these conditions, and how they need to be negotiated. VGI applications for such farmer communities may help to corroborate that knowledge, and have it fed back to the same communities for further exploitation.\u0000 Of special importance in these applications is the notion of repetitive or cyclic activity. In this paper, we present an extended formal framework for these and apply it to a conceptualisation of cyclic, on-farm activities in coffee farming, as typically occurring in sub-Saharan economies. We start by adopting a model of cyclic change to formalise our conceptualisation of on-farm activities, reaching the conclusion that the framework requires extension to allow capturing more of the activity semantics. A proposal is made for that extension, and it includes notions of subcyclic intervals and cyclic aggregations. We subsequently demonstrate these extensions with our conceptualised on-farm activities, and discuss what added functionality they bring to an online information system, under development, that aims to better inform coffee farmers of good practice at designated locations.","PeriodicalId":132038,"journal":{"name":"GEOCROWD '12","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129423210","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

Spatial interpretations of preposition "at" 介词“at”的空间解释

GEOCROWD '12 Pub Date : 2012-11-06 DOI: 10.1145/2442952.2442961

M. Vasardani, S. Winter, Kai-Florian Richter, Lesley Stirling, D. Richter

{"title":"Spatial interpretations of preposition \"at\"","authors":"M. Vasardani, S. Winter, Kai-Florian Richter, Lesley Stirling, D. Richter","doi":"10.1145/2442952.2442961","DOIUrl":"https://doi.org/10.1145/2442952.2442961","url":null,"abstract":"The current keyword- and substring matches-based retrieval methods most search engines rely on to answer spatial queries ignore the more specific interpretations of spatial relations. Moreover, the use of the general preposition \"at\" in natural language queries results in underspecified locations. This paper examines the use of \"at\" in a set of crowdsourced place descriptions and develops a methodology for interpreting \"at\" as one of the more location-specific, closely related spatial prepositions \"in\", \"on\", or \"by\". The application of suggested schemas in the paper enables the interpretation of \"at\" according to the granularity level and classification type of the spatial feature it refers to. The crowdsourced results show that most people use \"at\" to locate themselves either in relation to buildings, or to (naturally or artificially) bounded outdoor areas (at street level). When used with building level reference features, \"at\" is more likely to be interpreted as \"in\" the feature (mostly indoors) and less so \"by\" it. For reference features at street level, \"at\" is more likely to be interpreted as \"in\" the reference feature's region (within a bounded outdoor area) and less so \"on\" it (e.g., a water surface). The results indicate it is possible to use the proposed methodology for enabling search engines to better rank the results returned to natural language spatial queries by appropriately interpreting \"at\". The paper's research outcomes are an example of the use of crowdsourced information for improving the interaction between users and services.","PeriodicalId":132038,"journal":{"name":"GEOCROWD '12","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121671172","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: 15

Using social media to find places of interest: a case study 利用社交媒体寻找有趣的地方:一个案例研究

GEOCROWD '12 Pub Date : 2012-11-06 DOI: 10.1145/2442952.2442954

Steven Van Canneyt, O. Laere, S. Schockaert, B. Dhoedt

引用次数: 20

Using social media for collaborative species identification and occurrence: issues, methods, and tools 使用社会媒体进行协作物种识别和发生:问题、方法和工具

GEOCROWD '12 Pub Date : 2012-11-06 DOI: 10.1145/2442952.2442957

D. Deng, Tyng-Ruey Chuang, K. Shao, Guan-Shuo Mai, T. Lin, R. Lemmens, Cheng-Hsin Hsu, Hsu-Hong Lin, M. Kraak

{"title":"Using social media for collaborative species identification and occurrence: issues, methods, and tools","authors":"D. Deng, Tyng-Ruey Chuang, K. Shao, Guan-Shuo Mai, T. Lin, R. Lemmens, Cheng-Hsin Hsu, Hsu-Hong Lin, M. Kraak","doi":"10.1145/2442952.2442957","DOIUrl":"https://doi.org/10.1145/2442952.2442957","url":null,"abstract":"The emergence of social media enables people to interact with others on the web in ways that are media-rich (\"updates\" or \"posts\" can be text, photo, audio, video, etc), time-shifted (correspondence need not happen at once or within a pre-defined time frame), and social in nature. By utilizing social media, citizen science projects can potentially engage many participants to contribute their observations covering a large geographic region and over a long time period. This is an improvement, for example, over traditional biodiversity surveys which typically involve relatively few people in confined regions and periods.\u0000 As social media is not designed for scientific data collection and analysis, there is a problem in transferring unstructured information items (e.g. free-form text, unidentified images, etc.) often found in social media to structured data records for scientific tasks. To help bridge this gap, we propose an approach comprised of three steps: (1) Information Extraction, (2) Information Formalization, and (3) Information Reuse. We apply this approach to processing posts and comments from two Facebook interest groups on species observations. Our study demonstrates that with principled methods and proper tools, crowdsourced social media contents such as those from Facebook interest groups can be used for collaborative species identification and occurrence.","PeriodicalId":132038,"journal":{"name":"GEOCROWD '12","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121731249","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: 15

Privacy-aware geolocation interfaces for volunteered geography: a case study 自愿地理的隐私意识地理定位接口:一个案例研究

GEOCROWD '12 Pub Date : 2012-11-06 DOI: 10.1145/2442952.2442967

M. Damiani, Colette Cuijpers

引用次数: 4