49 research outputs found
Proceedings of the GIS Research UK 18th Annual Conference GISRUK 2010
This volume holds the papers from the 18th annual GIS Research UK (GISRUK). This year the conference, hosted at University College London (UCL), from Wednesday 14 to Friday 16 April 2010. The conference covered the areas of core geographic information science research as well as applications domains such as crime and health and technological developments in LBS and the geoweb.
UCLβs research mission as a global university is based around a series of Grand Challenges that affect us all, and these were accommodated in GISRUK 2010.
The overarching theme this year was βGlobal Challengesβ, with specific focus on the following themes:
* Crime and Place
* Environmental Change
* Intelligent Transport
* Public Health and Epidemiology
* Simulation and Modelling
* London as a global city
* The geoweb and neo-geography
* Open GIS and Volunteered Geographic Information
* Human-Computer Interaction and GIS
Traditionally, GISRUK has provided a platform for early career researchers as well as those with a significant track record of achievement in the area. As such, the conference provides a welcome blend of innovative thinking and mature reflection. GISRUK is the premier academic GIS conference in the UK and we are keen to maintain its outstanding record of achievement in developing GIS in the UK and beyond
Developing a Framework for Stigmergic Human Collaboration with Technology Tools: Cases in Emergency Response
Information and Communications Technologies (ICTs), particularly social media and geographic information systems (GIS), have become a transformational force in emergency response. Social media enables ad hoc collaboration, providing timely, useful information dissemination and sharing, and helping to overcome limitations of time and place. Geographic information systems increase the level of situation awareness, serving geospatial data using interactive maps, animations, and computer generated imagery derived from sophisticated global remote sensing systems. Digital workspaces bring these technologies together and contribute to meeting ad hoc and formal emergency response challenges through their affordances of situation awareness and mass collaboration. Distributed ICTs that enable ad hoc emergency response via digital workspaces have arguably made traditional top-down system deployments less relevant in certain situations, including emergency response (Merrill, 2009; Heylighen, 2007a, b). Heylighen (2014, 2007a, b) theorizes that human cognitive stigmergy explains some self-organizing characteristics of ad hoc systems. Elliott (2007) identifies cognitive stigmergy as a factor in mass collaborations supported by digital workspaces. Stigmergy, a term from biology, refers to the phenomenon of self-organizing systems with agents that coordinate via perceived changes in the environment rather than direct communication. In the present research, ad hoc emergency response is examined through the lens of human cognitive stigmergy. The basic assertion is that ICTs and stigmergy together make possible highly effective ad hoc collaborations in circumstances where more typical collaborative methods break down. The research is organized into three essays: an in-depth analysis of the development and deployment of the Ushahidi emergency response software platform, a comparison of the emergency response ICTs used for emergency response during Hurricanes Katrina and Sandy, and a process model developed from the case studies and relevant academic literature is described
ΠΠΊΡΡΠΆΠ΅ΡΠ΅ Π·Π° Π°Π½Π°Π»ΠΈΠ·Ρ ΠΈ ΠΎΡΠ΅Π½Ρ ΠΊΠ²Π°Π»ΠΈΡΠ΅ΡΠ° Π²Π΅Π»ΠΈΠΊΠΈΡ ΠΈ ΠΏΠΎΠ²Π΅Π·Π°Π½ΠΈΡ ΠΏΠΎΠ΄Π°ΡΠ°ΠΊΠ°
Linking and publishing data in the Linked Open Data format increases the interoperability
and discoverability of resources over the Web. To accomplish this, the process comprises
several design decisions, based on the Linked Data principles that, on one hand, recommend to
use standards for the representation and the access to data on the Web, and on the other hand
to set hyperlinks between data from different sources.
Despite the efforts of the World Wide Web Consortium (W3C), being the main international
standards organization for the World Wide Web, there is no one tailored formula for publishing
data as Linked Data. In addition, the quality of the published Linked Open Data (LOD) is a
fundamental issue, and it is yet to be thoroughly managed and considered.
In this doctoral thesis, the main objective is to design and implement a novel framework for
selecting, analyzing, converting, interlinking, and publishing data from diverse sources,
simultaneously paying great attention to quality assessment throughout all steps and modules
of the framework. The goal is to examine whether and to what extent are the Semantic Web
technologies applicable for merging data from different sources and enabling end-users to
obtain additional information that was not available in individual datasets, in addition to the
integration into the Semantic Web community space. Additionally, the Ph.D. thesis intends to
validate the applicability of the process in the specific and demanding use case, i.e. for creating
and publishing an Arabic Linked Drug Dataset, based on open drug datasets from selected
Arabic countries and to discuss the quality issues observed in the linked data life-cycle. To that
end, in this doctoral thesis, a Semantic Data Lake was established in the pharmaceutical domain
that allows further integration and developing different business services on top of the
integrated data sources. Through data representation in an open machine-readable format, the
approach offers an optimum solution for information and data dissemination for building
domain-specific applications, and to enrich and gain value from the original dataset. This thesis
showcases how the pharmaceutical domain benefits from the evolving research trends for
building competitive advantages. However, as it is elaborated in this thesis, a better
understanding of the specifics of the Arabic language is required to extend linked data
technologies utilization in targeted Arabic organizations.ΠΠΎΠ²Π΅Π·ΠΈΠ²Π°ΡΠ΅ ΠΈ ΠΎΠ±ΡΠ°Π²ΡΠΈΠ²Π°ΡΠ΅ ΠΏΠΎΠ΄Π°ΡΠ°ΠΊΠ° Ρ ΡΠΎΡΠΌΠ°ΡΡ "ΠΠΎΠ²Π΅Π·Π°Π½ΠΈ ΠΎΡΠ²ΠΎΡΠ΅Π½ΠΈ ΠΏΠΎΠ΄Π°ΡΠΈ" (Π΅Π½Π³.
Linked Open Data) ΠΏΠΎΠ²Π΅ΡΠ°Π²Π° ΠΈΠ½ΡΠ΅ΡΠΎΠΏΠ΅ΡΠ°Π±ΠΈΠ»Π½ΠΎΡΡ ΠΈ ΠΌΠΎΠ³ΡΡΠ½ΠΎΡΡΠΈ Π·Π° ΠΏΡΠ΅ΡΡΠ°ΠΆΠΈΠ²Π°ΡΠ΅ ΡΠ΅ΡΡΡΡΠ°
ΠΏΡΠ΅ΠΊΠΎ Web-Π°. ΠΡΠΎΡΠ΅Ρ ΡΠ΅ Π·Π°ΡΠ½ΠΎΠ²Π°Π½ Π½Π° Linked Data ΠΏΡΠΈΠ½ΡΠΈΠΏΠΈΠΌΠ° (W3C, 2006) ΠΊΠΎΡΠΈ ΡΠ° ΡΠ΅Π΄Π½Π΅
ΡΡΡΠ°Π½Π΅ Π΅Π»Π°Π±ΠΎΡΠΈΡΠ° ΡΡΠ°Π½Π΄Π°ΡΠ΄Π΅ Π·Π° ΠΏΡΠ΅Π΄ΡΡΠ°Π²ΡΠ°ΡΠ΅ ΠΈ ΠΏΡΠΈΡΡΡΠΏ ΠΏΠΎΠ΄Π°ΡΠΈΠΌΠ° Π½Π° WΠ΅Π±Ρ (RDF, OWL,
SPARQL), Π° ΡΠ° Π΄ΡΡΠ³Π΅ ΡΡΡΠ°Π½Π΅, ΠΏΡΠΈΠ½ΡΠΈΠΏΠΈ ΡΡΠ³Π΅ΡΠΈΡΡ ΠΊΠΎΡΠΈΡΡΠ΅ΡΠ΅ Ρ
ΠΈΠΏΠ΅ΡΠ²Π΅Π·Π° ΠΈΠ·ΠΌΠ΅ΡΡ ΠΏΠΎΠ΄Π°ΡΠ°ΠΊΠ°
ΠΈΠ· ΡΠ°Π·Π»ΠΈΡΠΈΡΠΈΡ
ΠΈΠ·Π²ΠΎΡΠ°.
Π£ΠΏΡΠΊΠΎΡ Π½Π°ΠΏΠΎΡΠΈΠΌΠ° W3C ΠΊΠΎΠ½Π·ΠΎΡΡΠΈΡΡΠΌΠ° (W3C ΡΠ΅ Π³Π»Π°Π²Π½Π° ΠΌΠ΅ΡΡΠ½Π°ΡΠΎΠ΄Π½Π° ΠΎΡΠ³Π°Π½ΠΈΠ·Π°ΡΠΈΡΠ° Π·Π°
ΡΡΠ°Π½Π΄Π°ΡΠ΄Π΅ Π·Π° Web-Ρ), Π½Π΅ ΠΏΠΎΡΡΠΎΡΠΈ ΡΠ΅Π΄ΠΈΠ½ΡΡΠ²Π΅Π½Π° ΡΠΎΡΠΌΡΠ»Π° Π·Π° ΠΈΠΌΠΏΠ»Π΅ΠΌΠ΅Π½ΡΠ°ΡΠΈΡΡ ΠΏΡΠΎΡΠ΅ΡΠ°
ΠΎΠ±ΡΠ°Π²ΡΠΈΠ²Π°ΡΠ΅ ΠΏΠΎΠ΄Π°ΡΠ°ΠΊΠ° Ρ Linked Data ΡΠΎΡΠΌΠ°ΡΡ. Π£Π·ΠΈΠΌΠ°ΡΡΡΠΈ Ρ ΠΎΠ±Π·ΠΈΡ Π΄Π° ΡΠ΅ ΠΊΠ²Π°Π»ΠΈΡΠ΅Ρ
ΠΎΠ±ΡΠ°Π²ΡΠ΅Π½ΠΈΡ
ΠΏΠΎΠ²Π΅Π·Π°Π½ΠΈΡ
ΠΎΡΠ²ΠΎΡΠ΅Π½ΠΈΡ
ΠΏΠΎΠ΄Π°ΡΠ°ΠΊΠ° ΠΎΠ΄Π»ΡΡΡΡΡΡΠΈ Π·Π° Π±ΡΠ΄ΡΡΠΈ ΡΠ°Π·Π²ΠΎΡ Web-Π°, Ρ ΠΎΠ²ΠΎΡ
Π΄ΠΎΠΊΡΠΎΡΡΠΊΠΎΡ Π΄ΠΈΡΠ΅ΡΡΠ°ΡΠΈΡΠΈ, Π³Π»Π°Π²Π½ΠΈ ΡΠΈΡ ΡΠ΅ (1) Π΄ΠΈΠ·Π°ΡΠ½ ΠΈ ΠΈΠΌΠΏΠ»Π΅ΠΌΠ΅Π½ΡΠ°ΡΠΈΡΠ° ΠΈΠ½ΠΎΠ²Π°ΡΠΈΠ²Π½ΠΎΠ³ ΠΎΠΊΠ²ΠΈΡΠ°
Π·Π° ΠΈΠ·Π±ΠΎΡ, Π°Π½Π°Π»ΠΈΠ·Ρ, ΠΊΠΎΠ½Π²Π΅ΡΠ·ΠΈΡΡ, ΠΌΠ΅ΡΡΡΠΎΠ±Π½ΠΎ ΠΏΠΎΠ²Π΅Π·ΠΈΠ²Π°ΡΠ΅ ΠΈ ΠΎΠ±ΡΠ°Π²ΡΠΈΠ²Π°ΡΠ΅ ΠΏΠΎΠ΄Π°ΡΠ°ΠΊΠ° ΠΈΠ·
ΡΠ°Π·Π»ΠΈΡΠΈΡΠΈΡ
ΠΈΠ·Π²ΠΎΡΠ° ΠΈ (2) Π°Π½Π°Π»ΠΈΠ·Π° ΠΏΡΠΈΠΌΠ΅Π½Π° ΠΎΠ²ΠΎΠ³ ΠΏΡΠΈΡΡΡΠΏΠ° Ρ ΡΠ°ΡΠΌΠ°ΡeΡΡΡΠΊΠΎΠΌ Π΄ΠΎΠΌΠ΅Π½Ρ.
ΠΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½Π° Π΄ΠΎΠΊΡΠΎΡΡΠΊΠ° Π΄ΠΈΡΠ΅ΡΡΠ°ΡΠΈΡΠ° Π΄Π΅ΡΠ°ΡΠ½ΠΎ ΠΈΡΡΡΠ°ΠΆΡΡΠ΅ ΠΏΠΈΡΠ°ΡΠ΅ ΠΊΠ²Π°Π»ΠΈΡΠ΅ΡΠ° Π²Π΅Π»ΠΈΠΊΠΈΡ
ΠΈ
ΠΏΠΎΠ²Π΅Π·Π°Π½ΠΈΡ
Π΅ΠΊΠΎΡΠΈΡΡΠ΅ΠΌΠ° ΠΏΠΎΠ΄Π°ΡΠ°ΠΊΠ° (Π΅Π½Π³. Linked Data Ecosystems), ΡΠ·ΠΈΠΌΠ°ΡΡΡΠΈ Ρ ΠΎΠ±Π·ΠΈΡ
ΠΌΠΎΠ³ΡΡΠ½ΠΎΡΡ ΠΏΠΎΠ½ΠΎΠ²Π½ΠΎΠ³ ΠΊΠΎΡΠΈΡΡΠ΅ΡΠ° ΠΎΡΠ²ΠΎΡΠ΅Π½ΠΈΡ
ΠΏΠΎΠ΄Π°ΡΠ°ΠΊΠ°. Π Π°Π΄ ΡΠ΅ ΠΌΠΎΡΠΈΠ²ΠΈΡΠ°Π½ ΠΏΠΎΡΡΠ΅Π±ΠΎΠΌ Π΄Π° ΡΠ΅
ΠΎΠΌΠΎΠ³ΡΡΠΈ ΠΈΡΡΡΠ°ΠΆΠΈΠ²Π°ΡΠΈΠΌΠ° ΠΈΠ· Π°ΡΠ°ΠΏΡΠΊΠΈΡ
Π·Π΅ΠΌΠ°ΡΠ° Π΄Π° ΡΠΏΠΎΡΡΠ΅Π±ΠΎΠΌ ΡΠ΅ΠΌΠ°Π½ΡΠΈΡΠΊΠΈΡ
Π²Π΅Π± ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΡΠ°
ΠΏΠΎΠ²Π΅ΠΆΡ ΡΠ²ΠΎΡΠ΅ ΠΏΠΎΠ΄Π°ΡΠΊΠ΅ ΡΠ° ΠΎΡΠ²ΠΎΡΠ΅Π½ΠΈΠΌ ΠΏΠΎΠ΄Π°ΡΠΈΠΌΠ°, ΠΊΠ°ΠΎ Π½ΠΏΡ. DBpedia-ΡΠΎΠΌ. Π¦ΠΈΡ ΡΠ΅ Π΄Π° ΡΠ΅ ΠΈΡΠΏΠΈΡΠ°
Π΄Π° Π»ΠΈ ΠΎΡΠ²ΠΎΡΠ΅Π½ΠΈ ΠΏΠΎΠ΄Π°ΡΠΈ ΠΈΠ· ΠΡΠ°ΠΏΡΠΊΠΈΡ
Π·Π΅ΠΌΠ°ΡΠ° ΠΎΠΌΠΎΠ³ΡΡΠ°Π²Π°ΡΡ ΠΊΡΠ°ΡΡΠΈΠΌ ΠΊΠΎΡΠΈΡΠ½ΠΈΡΠΈΠΌΠ° Π΄Π° Π΄ΠΎΠ±ΠΈΡΡ
Π΄ΠΎΠ΄Π°ΡΠ½Π΅ ΠΈΠ½ΡΠΎΡΠΌΠ°ΡΠΈΡΠ΅ ΠΊΠΎΡΠ΅ Π½ΠΈΡΡ Π΄ΠΎΡΡΡΠΏΠ½Π΅ Ρ ΠΏΠΎΡΠ΅Π΄ΠΈΠ½Π°ΡΠ½ΠΈΠΌ ΡΠΊΡΠΏΠΎΠ²ΠΈΠΌΠ° ΠΏΠΎΠ΄Π°ΡΠ°ΠΊΠ°, ΠΏΠΎΡΠ΅Π΄
ΠΈΠ½ΡΠ΅Π³ΡΠ°ΡΠΈΡΠ΅ Ρ ΡΠ΅ΠΌΠ°Π½ΡΠΈΡΠΊΠΈ WΠ΅Π± ΠΏΡΠΎΡΡΠΎΡ.
ΠΠΎΠΊΡΠΎΡΡΠΊΠ° Π΄ΠΈΡΠ΅ΡΡΠ°ΡΠΈΡΠ° ΠΏΡΠ΅Π΄Π»Π°ΠΆΠ΅ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ»ΠΎΠ³ΠΈΡΡ Π·Π° ΡΠ°Π·Π²ΠΎΡ Π°ΠΏΠ»ΠΈΠΊΠ°ΡΠΈΡΠ΅ Π·Π° ΡΠ°Π΄ ΡΠ°
ΠΏΠΎΠ²Π΅Π·Π°Π½ΠΈΠΌ (Linked) ΠΏΠΎΠ΄Π°ΡΠΈΠΌΠ° ΠΈ ΠΈΠΌΠΏΠ»Π΅ΠΌΠ΅Π½ΡΠΈΡΠ° ΡΠΎΡΡΠ²Π΅ΡΡΠΊΠΎ ΡΠ΅ΡΠ΅ΡΠ΅ ΠΊΠΎΡΠ΅ ΠΎΠΌΠΎΠ³ΡΡΡΡΠ΅
ΠΏΡΠ΅ΡΡΠ°ΠΆΠΈΠ²Π°ΡΠ΅ ΠΊΠΎΠ½ΡΠΎΠ»ΠΈΠ΄ΠΎΠ²Π°Π½ΠΎΠ³ ΡΠΊΡΠΏΠ° ΠΏΠΎΠ΄Π°ΡΠ°ΠΊΠ° ΠΎ Π»Π΅ΠΊΠΎΠ²ΠΈΠΌΠ° ΠΈΠ· ΠΈΠ·Π°Π±ΡΠ°Π½ΠΈΡ
Π°ΡΠ°ΠΏΡΠΊΠΈΡ
Π·Π΅ΠΌΠ°ΡΠ°. ΠΠΎΠ½ΡΠΎΠ»ΠΈΠ΄ΠΎΠ²Π°Π½ΠΈ ΡΠΊΡΠΏ ΠΏΠΎΠ΄Π°ΡΠ°ΠΊΠ° ΡΠ΅ ΠΈΠΌΠΏΠ»Π΅ΠΌΠ΅Π½ΡΠΈΡΠ°Π½ Ρ ΠΎΠ±Π»ΠΈΠΊΡ Π‘Π΅ΠΌΠ°Π½ΡΠΈΡΠΊΠΎΠ³ ΡΠ΅Π·Π΅ΡΠ°
ΠΏΠΎΠ΄Π°ΡΠ°ΠΊΠ° (Π΅Π½Π³. Semantic Data Lake).
ΠΠ²Π° ΡΠ΅Π·Π° ΠΏΠΎΠΊΠ°Π·ΡΡΠ΅ ΠΊΠ°ΠΊΠΎ ΡΠ°ΡΠΌΠ°ΡΠ΅ΡΡΡΠΊΠ° ΠΈΠ½Π΄ΡΡΡΡΠΈΡΠ° ΠΈΠΌΠ° ΠΊΠΎΡΠΈΡΡΠΈ ΠΎΠ΄ ΠΏΡΠΈΠΌΠ΅Π½Π΅
ΠΈΠ½ΠΎΠ²Π°ΡΠΈΠ²Π½ΠΈΡ
ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΡΠ° ΠΈ ΠΈΡΡΡΠ°ΠΆΠΈΠ²Π°ΡΠΊΠΈΡ
ΡΡΠ΅Π½Π΄ΠΎΠ²Π° ΠΈΠ· ΠΎΠ±Π»Π°ΡΡΠΈ ΡΠ΅ΠΌΠ°Π½ΡΠΈΡΠΊΠΈΡ
ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΡΠ°. ΠΠ΅ΡΡΡΠΈΠΌ, ΠΊΠ°ΠΊΠΎ ΡΠ΅ Π΅Π»Π°Π±ΠΎΡΠΈΡΠ°Π½ΠΎ Ρ ΠΎΠ²ΠΎΡ ΡΠ΅Π·ΠΈ, ΠΏΠΎΡΡΠ΅Π±Π½ΠΎ ΡΠ΅ Π±ΠΎΡΠ΅ ΡΠ°Π·ΡΠΌΠ΅Π²Π°ΡΠ΅
ΡΠΏΠ΅ΡΠΈΡΠΈΡΠ½ΠΎΡΡΠΈ Π°ΡΠ°ΠΏΡΠΊΠΎΠ³ ΡΠ΅Π·ΠΈΠΊΠ° Π·Π° ΠΈΠΌΠΏΠ»Π΅ΠΌΠ΅Π½ΡΠ°ΡΠΈΡΡ Linked Data Π°Π»Π°ΡΠ° ΠΈ ΡΡΡ
ΠΎΠ²Ρ ΠΏΡΠΈΠΌΠ΅Π½Ρ
ΡΠ° ΠΏΠΎΠ΄Π°ΡΠΈΠΌΠ° ΠΈΠ· ΠΡΠ°ΠΏΡΠΊΠΈΡ
Π·Π΅ΠΌΠ°ΡΠ°
Semantic discovery and reuse of business process patterns
Patterns currently play an important role in modern information systems (IS) development and their use has mainly been restricted to the design and implementation phases of the development lifecycle. Given the increasing significance of business modelling in IS development, patterns have the potential of providing a viable solution for promoting reusability of recurrent generalized models in the very early stages of development. As a statement of research-in-progress this paper focuses on business process patterns and proposes an initial methodological framework for the discovery and reuse of business process patterns within the IS development lifecycle. The framework borrows ideas from the domain engineering literature and proposes the use of semantics to drive both the discovery of patterns as well as their reuse
OGRS2012 Symposium Proceedings
Do you remember the Open Source Geospatial Research and Education Symposium (OGRS) in Nantes? "Les Machines de lβΓle", the Big Elephant, the "Storm Boat" with Claramunt, Petit et al. (2009), and "le Biniou et la Bombarde"? A second edition of OGRS was promised, and that promise is now fulfilled in OGRS 2012, Yverdon-les-Bains, Switzerland, October 24-26, 2012. OGRS is a meeting dedicated to sharing knowledge, new solutions, methods, practices, ideas and trends in the field of geospatial information through the development and the use of free and open source software in both research and education. In recent years, the development of geospatial free and open source software (GFOSS) has breathed new life into the geospatial domain. GFOSS has been extensively promoted by FOSS4G events, which evolved from meetings which gathered together interested GFOSS development communities to a standard business conference. More in line with the academic side of the FOSS4G conferences, OGRS is a rather neutral forum whose goal is to assemble a community whose main concern is to find new solutions by sharing knowledge and methods free of software license limits. This is why OGRS is primarily concerned with the academic world, though it also involves public institutions, organizations and companies interested in geospatial innovation. This symposium is therefore not an exhibition for presenting existing industrial software solutions, but an event we hope will act as a catalyst for research and innovation and new collaborations between research teams, public agencies and industries. An educational aspect has recently been added to the content of the symposium. This important addition examines the knowledge triangle - research, education, and innovation - through the lens of how open source methods can improve education efficiency. Based on their experience, OGRS contributors bring to the table ideas on how open source training is likely to offer pedagogical advantages to equip students with the skills and knowledge necessary to succeed in tomorrowβs geospatial labor market. OGRS brings together a large collection of current innovative research projects from around the world, with the goal of examining how research uses and contributes to open source initiatives. By presenting their research, OGRS contributors shed light on how the open-source approach impacts research, and vice-versa. The organizers of the symposium wish to demonstrate how the use and development of open source software strengthen education, research and innovation in geospatial fields. To support this approach, the present proceedings propose thirty short papers grouped under the following thematic headings: Education, Earth Science & Landscape, Data, Remote Sensing, Spatial Analysis, Urban Simulation and Tools. These papers are preceded by the contributions of the four keynote speakers: Prof Helena Mitasova, Dr GΓ©rard HΓ©gron, Prof Sergio Rey and Prof Robert Weibel, who share their expertise in research and education in order to highlight the decisive advantages of openness over the limits imposed by the closed-source license system
Mapping and the Citizen Sensor
Maps are a fundamental resource in a diverse array of applications ranging from everyday activities, such as route planning through the legal demarcation of space to scientific studies, such as those seeking to understand biodiversity and inform the design of nature reserves for species conservation. For a map to have value, it should provide an accurate and timely representation of the phenomenon depicted and this can be a challenge in a dynamic world. Fortunately, mapping activities have benefitted greatly from recent advances in geoinformation technologies. Satellite remote sensing, for example, now offers unparalleled data acquisition and authoritative mapping agencies have developed systems for the routine production of maps in accordance with strict standards. Until recently, much mapping activity was in the exclusive realm of authoritative agencies but technological development has also allowed the rise of the amateur mapping community. The proliferation of inexpensive and highly mobile and location aware devices together with Web 2.0 technology have fostered the emergence of the citizen as a source of data. Mapping presently benefits from vast amounts of spatial data as well as people able to provide observations of geographic phenomena, which can inform map production, revision and evaluation. The great potential of these developments is, however, often limited by concerns. The latter span issues from the nature of the citizens through the way data are collected and shared to the quality and trustworthiness of the data. This book reports on some of the key issues connected with the use of citizen sensors in mapping. It arises from a European Co-operation in Science and Technology (COST) Action, which explored issues linked to topics ranging from citizen motivation, data acquisition, data quality and the use of citizen derived data in the production of maps that rival, and sometimes surpass, maps arising from authoritative agencies
Electronic Imaging & the Visual Arts. EVA 2014 Florence
Information Technologies of interest for Culture Heritage are presented: multimedia systems, data-bases, data protection, access to digital content, Virtual Galleries. Particular reference is reserved to digital images (Electronic Imaging & the Visual Arts), regarding Cultural Institutions (Museums, Libraries, Palace - Monuments, Archaeological Sites). The International Conference includes the following Sessions: Strategic Issues; EC Projects and Related Networks & Initiatives; 2D - 3D Technologies and Applications; Virtual Galleries - Museums and Related Initiatives; Access to the Culture Information. Three Workshops regard: International Cooperation; Innovation and Enterprise; e.Culture Cloud
Spatial and Temporal Sentiment Analysis of Twitter data
The public have used Twitter world wide for expressing opinions. This study focuses on spatio-temporal variation of georeferenced Tweetsβ sentiment polarity, with a view to understanding how opinions evolve on Twitter over space and time and across communities of users. More specifically, the question this study tested is whether sentiment polarity on Twitter exhibits specific time-location patterns. The aim of the study is to investigate the spatial and temporal distribution of georeferenced Twitter sentiment polarity within the area of 1 km buffer around the Curtin Bentley campus boundary in Perth, Western Australia. Tweets posted in campus were assigned into six spatial zones and four time zones. A sentiment analysis was then conducted for each zone using the sentiment analyser tool in the Starlight Visual Information System software. The Feature Manipulation Engine was employed to convert non-spatial files into spatial and temporal feature class. The spatial and temporal distribution of Twitter sentiment polarity patterns over space and time was mapped using Geographic Information Systems (GIS). Some interesting results were identified. For example, the highest percentage of positive Tweets occurred in the social science area, while science and engineering and dormitory areas had the highest percentage of negative postings. The number of negative Tweets increases in the library and science and engineering areas as the end of the semester approaches, reaching a peak around an exam period, while the percentage of negative Tweets drops at the end of the semester in the entertainment and sport and dormitory area. This study will provide some insights into understanding students and staff βs sentiment variation on Twitter, which could be useful for university teaching and learning management