CartoTalk Peter Mooney

We are happy to welcome Peter Mooney of the National University of Ireland, Maynooth for a CartoTalk:

Volunteered Geographic Information (VGI):
A source of spatial data for Location-based Services (LBS)?

The ubiquity of location-based services (LBS) has created an exciting and rapidly evolving confluence of: GIS, web application programming, mobile cartography and user interfaces, and computer networking. As a consequence the amount of Volunteered Geographic Information (VGI) available on the Internet today has grown enormously in the past few years. Initiatives such as Wikimapia, Google Mapmaker, OpenStreetMap (OSM), geotagging in Flickr, geolocation in Twitter, Geonames, etc have seen VGI become a “hot topic in GIS research” (Mooney et al, 2010). VGI (such as OSM) has begun to to provide interesting and feasible alternatives to traditional authoritative spatial information from National Mapping Agencies and corporations. However VGI, as a spatial form of user-generated content in Web 2.0, has raised serious concerns and reservations within the GIS, Geomatics, and Cartography communities surrounding its quality, accuracy, sustainability, and fitness for use/purpose (Mooney et al, 2010). Keßler et al (2009) Compared to other projects building on user contributed content, such as Wikipedia, VGI remains on “the GIS periphery” (Keßler et al, 2009), has been restricted to web-based mapping applications (Haklay, 2010), and not considered for involvement in “serious geomatics applications” (Over et al, 2010). This talk will investigate, using OSM as a case-study, if VGI can support the geospatial data/content requirements of todays and tomorrow’s LBS.  Raper et al (2007) stress that “one key function that is rarely discussed in LBS is geospatial content management”  and subsequently classify it as an urgent research need.  Khurri and Luukkainen (2009) argue that spatial data vendors must, to gain competitive advantage in the marketplace, supply accurate, timely, and relevant content to consumers in dynamically changing environments. Through a statistical analysis of the history of user contributions to OSM databases this talk will highlight the advantages and disadvantages of VGI for LBS. Our conclusions indicate that VGI will need to introduce improved management of contributions and contributors to prevent its spatial data moving indefinitely between a status of good and bad quality. The presentation will close with some thoughts on the future for management of geospatial data and associated content for LBS.

Friday, 15 April 2011, 3.00 pm
Seminarraum 126
Research Group Cartography
Erzherzog-Johann-Platz 1, 1040 Vienna

Invitation as PDF
Presentation slides as PDF

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CartoTalk Eszter Simonné-Dombóvári

Wir freuen uns, dass im nächsten CartoTalk unsere Kollegin Eszter Simonné-Dombóvári von ihrer Forschungsarbeit berichten wird:

Interaktive kartographische Webapplikationen im Unterricht

Zu den wichtigsten Zielen der Unterrichtspolitik der Europäischen Union gehört die Umsetzung eines hochqualitativen Bildungs- und Ausbildungssystems. „Lebenslanges Lernen“ und „kompetenzbasierte Ausbildung“ sind nur zwei der Keywords, die unsere Wissensgesellschaft in den letzten Jahrzehnten geprägt hat und traditionelle Bildungssysteme vor neue Herausforderungen stellte. Auch digitale Technologien brachten weitreichende gesellschaftliche Veränderungen, die auch im Bildungssystem berücksichtigt werden müssen.

Neben traditionellen Lehrmitteln spielen neue Medien und technologische Lösungen eine immer wichtigere Rolle im Schulunterricht. Für die Themen Geographie und Kartographie sind immer mehr informative oder populärwissenschaftliche Unterrichtshilfsmittel auch im Internet erreichbar, wie z.B. Geographie-Portale, Enzyklopädien, fachdidaktische Hilfsmittel, Datenbanken und Sammlungen von stummen Karten, die auch ein unterhaltsames Lernen mit Hilfe von Multimedia („Edutainment“) ermöglichen. Die Möglichkeiten des Web Mapping 2.0 verändern Unterrichtsmethode und -inhalt und bringen qualitative Veränderungen in den Unterricht. Die Anwendungen können die Arbeit und Vorbereitung der LehrerInnen und SchülerInnen unterstützen, bzw. auch außerschulisch das Interesse für die Themen Geographie und Kartographie wecken.

Der Vortrag beschäftigt sich mit den Fragen, welche Möglichkeiten die neuen digitalen Lernmittel enthalten können, und welche Rolle die Internetkartographie dabei spielen kann. Internationale Beispiele von interaktiven kartographischen Webanwendungen für topographischen und kartographischen Wissenserwerb werden präsentiert und zur Diskussion gestellt.

 

Freitag, 18. März 2011, 13.00 Uhr
Seminarraum 126 der Forschungsgruppe Kartographie,
Erzherzog-Johann-Platz 1, 1040 Wien

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CartoTalk László Zentai

We are happy to welcome László Zentai of the Department of Cartography and Geoinformatics of the Eötvös University Budapest to our colloquium CartoTalks:

Are we ready for Cartography 2.0?
Application of Web 2.0 in cartographic education

The term web 2.0 was first used in 2004 on a conference where the organizers focused on the new generation web services. Although web is not software and it hasn’t had versions everybody has understood this term and also understood the real meaning behind it.

In the last 30 years cartography has considerable changed and we may think to use the similar term for our science: cartography 2.0.

Even web 2.0 is not a clear easily definable term we can list new features of the web which has formed this new term. Wiki, blog, RSS, mashup applications, social networking are the key features (and other less notorious are still under development) which are not concrete application, but rather philosophies.

One of the most prominent mashup application are the web-sites which are connected to GoogleEarth or similar services to use their basemaps/satellite images to add their own geographically located contents. These applications are also used by non-cartographers to help them to “make maps”.

Are these new features enough to introduce the new term: cartography 2.0?

Friday, December 3 2010, 10.00 am
Seminar room 126
Research Group Cartography
Erzherzog-Johann-Platz 1, 1040 Wien

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CartoTalk Jesús Reyes

We are happy to welcome Jesús Reyes of the Department of Cartography and Geoinformatics of the Eötvös University Budapest to our colloquium CartoTalks:

Alternative Solution for Data Visualisation

This presentation includes methods of representation less known and less used in thematic cartography: the cartograms and the Chernoff method.

The method of thematic representation named cartogram is one of the youngest methods in the-matic cartography (but specialists in map history affirmed that old maps as the Tabula Peutingeriana can be also considered a cartogram). Its origins are dated to the first years of the 20th century, but the first cartogram-like representations were made after the second half of the 19th century. During the 20th cen-tury numerous methods were created to make cartograms, beginning from the traditional calculation published by Erwin Raisz in his textbook “General Cartography” in 1938. The use of computer techniques in cartography (mainly of personal computers from the 1980’s) gave a new and decisive impulse to the making of cartograms (Tobler, 1983). From the last decade of the past century new, internationally ac-knowledged methods were developed by cartographers or specialists from research fields near to car-tography: Daniel Dorling (Cellular automata machine method and circular cartograms), Sabir Gusein-Zade and Vladimir Tikunov (Gusein-Zade and Tikunov method to construct contiguous cartograms), Michael Gastner and Mark Newman (diffusion-based cartogram).

In 1973 Hermann Chernoff (who at present is Professor Emeritus of Applied Mathematics, from the Department of Statistics at Harvard University) created a method for the graphic representation of statis-tical data in specific multivariate data on only one symbol (a human face) changing its features. Only four years later, from 1977 this method of representation began to be introduced also to cartography abroad, using the human faces to represent data on a map according to the traditional methods of thematic rep-resentation. Along the last two decades new maps were made taking advantage of the technological development represented by the daily use of personal computers in the research related to thematic cartography.

Some examples about international research on this theme and the general use of this method on maps are also included in the presentation, e.g. works as the map made by Sara I. Fabrikant (Department of Geography, University of Zurich) or the use of Chernoff faces as component of a cartogram (research finished by Daniel Dorling from the Department of Geography, University of Newcastle upon Tyne). Some of the practical experiences acquired during the theoretical and practical teaching of this method for MSc students on Cartography at Eotvos Lorand University are also presented. These experiences are illustrated by some thematic maps made by the students using the original Chernoff faces and it’s adap-tation to represent data on maps. Some new proposals about the possible future use of the Chernoff faces in school cartography (mainly on thematic maps in school atlases) are also conceived, more exactly how to adapt the original Chernoff method for its use on maps made for pupils in Elementary and Sec-ondary Schools, modifying the original method in interest of improving the map reading. These ques-tions were studied within an international project counting with the participation of Argentine and Hun-garian specialists, which is also presented briefly and the research follows within an Austrian-Hungarian bilateral project during 2010 and 2011.

Friday, October 29 2010, 11.30 am
Seminar room 126
Research Group Cartography
Erzherzog-Johann-Platz 1, 1040 Wien

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CartoTalk Muki Haklay

We are happy to welcome Muki Haklay of the University College London (UCL) to our colloquium CartoTalks:

Volunteered Geographic Information –
Overview, Quality and Contributors Behaviour

Over the past 5 years a new phenomenon emerged in the area of geographical information. This is the contribution of digital geographical information by non-professional contributors. The information that can be collected through this method ranges from georeferenced photographs to observations that are taken in different parts of the world and to detailed mapping activities. This user-contributed geographical information was termed Volunteered Geographical Information by Goodchild (2007).

In the talk, the background to this phenomenon will be covered, pointing to the technical and societal changes that enable it. Following this overview the issue of data quality and how to evaluate it, will be discussed. Finally the behaviour of participants and their motivation will be covered.

Examples from Flickr, OpenStreetMap and Google Map Maker will be used to illustrate the various aspects of VGI and to highlight that there is a rich seam of empirical data, both quantitative and qualitative, that can be used in VGI research.

Friday, October 8 2010, 10 am
Seminar room 126
Research Group Cartography
Erzherzog-Johann-Platz 1, 1040 Wien

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