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we cordially invite everybody interested to our next open GIScience colloquium talk

State of the Art of Event Detection from Geo-tagged Twitter Data

Diao Lin
Chair of Cartography, Technical University of Munich

Time and date: Mon, November 27, 2:15 pm
Venue: INF 348, Room 015, Department of Geography, Heidelberg University

The speaker tries to give a structured and comprehensive overview of event detection from geo-tagged twitter data and present some open questions. Precisely, it starts with an introduction of the basic conceptions to answer questions like: what is event and event detection in social media, then an overall workflow of event detection will be given. Based on existed techniques applied in recent papers, three different approaches of event detection focus on: clustering driven approaches, anomaly detection driven approaches, and topic modelling driven approaches will be analysed in terms of their algorithms and advantages and disadvantages. The talk ends with some open questions regarding the research challenges (e.g. scale problem), and trends (e.g. multi-source event detection) in the field of event detection from the perspective of GIScience.

The Interdisciplinary Center for Scientific Computing (IWR) at Heidelberg University is a leading institution in research and education in scientific computing in a multitude of interdisciplinary topics - covering science, engineering and humanities. Computational methods are a very important foundation in GIScience / Geoinformatics with particular focus on the investigation of geospatial data and geospatial computational methods. Alexander Zipf has been PI for GIScience / Geoinformatics at IWR for many years now.

Recently, Bernhard Höfle has been appointed new head of a main research group at IWR and thus the second group from GIScience Heidelberg. The particular focus of Bernhard’s group will be the development of new computational methods for “3D Geospatial Data Processing” and interdisciplinary applications in the broad field of digital and computational environmental sciences. Furthermore, he also becomes investigator at the Heidelberg Graduate School MathComp (HGS MathComp) where several collaborations with other IWR groups are already running.

Not undercover but on the cover: We were selected as cover story of the ISPRS International Journal of Geo-Information, Volume 6, Issue 11.

In our research on “Historic Low Wall Detection via Topographic Parameter Images Derived from Fine-Resolution DEM“, we apply rapid landscape line detection to extract historic vegetable garden walls based on topographic information from a LiDAR-derived high-resolution digital elevation model (DEM). The spatial information on slope, curvature, and openness enables the identification of the location of anthropogenic landscape features. Three rapid processes used in this study include the derivation of topographic parameters, line extraction and aggregation. Results show that wall line detection with multiple topographic parameter images is a simple means of obtaining essential historic wall feature information. The aggregation of three individual detection results from slope, curvature, and openness increases the accuracy of identification of historic anthropogenic features. Further research will consider the unmanned aerial vehicle for collecting point clouds and spectral information of image photos. View the paper

The regional GI Conference “Fachaustausch Geoinformatik” of the GeoNet.MRN is taking place on this Thursday Nov 23rd at the Print Media Academy Heidelberg. Prof. Alexander Zipf is giving one keynote about analysis and usage potential of free and open geodata. He will present some of the related work of the GIScience Research Group Heidelberg and the Heidelberg Institute for Geoinformation Technology (HeiGIT) with a focus on the three focus areas of HeiGIT,

but also related research projects or services related to open geoinformation, such as OpenStreetMap.

Attending the Fachaustausch Geoinformatik is free of charge. Feel welcome to join the programme. Visit GIScience Heidelberg/HeiGIT at the exhibition (Expo) in the Print Media Academy - just opposite of the main station!

Here you find some impressions from the regional tournament of the First League League (FLL), that today took place for the first time at Mathematikon Heidelberg and was co-organized by NanoGiants Academy e.V. and IWR (Interdisciplinary Center for Scientific Computing) Heidelberg University. This is part of a world wide event with over 1000 teams participating. School children had to perform several tasks related not only to programming and robotics but also to science and teamwork. This years overall topic was HydroDynamics, and both the robotics and science tasks were related to that theme. As part of IWR, Prof. Alexander Zipf of GIScience Heidelberg was among the judges and congratulates cordially all participants. Not only the winners, all teams did a terrific job and had lots of fun. Maybe you (or your children) want to join next year!?

Members of the GIScience Research Group Heidelberg and Heidelberg Institute for Geoinformation Technology (HeiGIT) had a really great visit to the fancy “Haus der Astronomie” (Wow, the architecture mimics a spiral galaxy!), the Max Plank Institute of Astronomie and the historic Landessternwarte Königstuhl (state observatory) from 1898. An interactive trip through the galaxy and beyond was provided using a state of the art digital planetarium projection system. Later we could experience some telescopes in action. The really very interesting guided tour can be highly recommended!

Now we are all motivated for some more rocket science!

Some GIScience HD and HeiGIT team members at the “Klaus Tschira Auditorium” of the Haus der Astronomie

Die Heidelberger Geographische Gesellschaft lädt ein:

Verkehrsplanung in Heidelberg - derzeitige Konzepte und Zukunftsvisionen

Dienstag, 21. November 2017, 19:00 Uhr
Dipl.-Geogr. Sebastian Gieler (Stadt Heidelberg)

Ort der Abendvorträge

Kleiner Hörsaal (HS2) des Kirchhoff -Instituts für Physik (KIP)

Heidelberg ist in den letzten Jahren um 10.000 Einwohner und ebenso viele Arbeitsplätze gewachsen. Ein ähnlicher Zuwachs ist in der kommenden Dekade zu erwarten – in einer Stadt mit mittelalterlichem Stadtzuschnitt und einer beengten Topographie eine große Herausforderung für den Verkehrsektor. Neben der Förderung umweltfreundlicher Verkehrsmittel sind neuartige Konzepte zur effizienten Verkehrsabwicklung gefragt. Die Digitalisierung und Vernetzung bietet hier viele Möglichkeiten. Gleichzeitig birgt die Technologieentwicklung im Bereich des autonomen Fahrens Chancen und Risiken für Städte, die noch schwer abzuschätzen sind. Im Vortrag sollen diese Aufgaben näher beleuchtet und Antworten gegeben werden.



Ort: Im Neuenheimer Feld, Gebäude INF 227 (gegenüber Mensa)

Eintrittspreise

Mitglieder frei

3,50 € (StudentInnen und SchülerInnen 2,- €)

Schulklassen in Begleitung ihrer LehrerInnen frei

Weitere Informationen: HGG Vorträge WS1718

HGG

Dear Geographers and Mapping Enthusiasts,

November 12th-18th is the international OpenStreetMap GeoWeek as part of the Geography Awareness Week. Since 1987, in the third week of November all around the world different kind of projects and activities are planned to raise awareness about the significance of geography and spatial data and how we affect and are affected by it.

This year we celebrate the 30th birthday of this important tradition for geographers all around the world. In this scope, the disastermappers heidelberg / GIScience Research Group Heidelberg University wants to invite you to a special Mapathon.

When: 14.11.2017, 6 pm

Where: Hörsaal, Berliner Straße 48, Heidelberg Institute of Geography, Heidelberg University

The Missing Maps event will be organized in collaboration with the further OSM GeoWeek partners and support one of the most urgent OSM GeoWeek projects around the topic of “Civil Rights”.

The event will start with an overview of the OSM GeoWeek, afterwards we will provide a short introduction into remote mapping in OpenStreetMap before the mapping sessions begin.

We will as usual provide snacks, drinks and nice after work sound.

We are looking forward to a large crowd, no previous knowledge needed, just bring your laptop and mouse if available!


Seit einiger Zeit nutzt das Deutsche Bundesamt für Kartographie und Geodäsie (BKG) openrouteservice (ORS) mit Daten von OpenStreetMap (OSM) als eigenen Routing-Dienst, inklusive der Geocoder und Isochronen APIs von ORS. Außerdem wurde die openrouteservice API um spezielle Funktionen erweitert, die z.B. für Radrouting relevant sind. Das BKG ist die amtliche Stelle für topographische Daten, Kartographie und geodätische Referenzsysteme für die deutsche Regierung. Die Agentur arbeitet im Bundesministerium des Innern mit Fachabteilungen für Geodäsie und Geoinformation.

Das BKG bietet eine Reihe interessanter Dienste an, darunter verschiedene APIs, die auf openrouteservice (ORS) basieren und OSM - Daten verwenden. Das BKG arbeitet hierbei mit dem Heidelberg Institute für Geoinformation Technologie (HeiGIT) zusammen. Zu diesem Zweck betreibt das BKG eigene Instanzen der openrouteservice-Infrastruktur in ihrem Cloud-Center. Somit werden Geokodierung, Routenplanung und Isochronen als Dienst angeboten.

Außerdem wurden vor kurzem der ORS Routing-API eine Reihe neuer Funktionen für Radfahrer hinzugefügt:

- Continue straight

Continue straight zwingt Ihre Route, an bestimmten Wegpunkten weiter geradeaus zu fahren, auch wenn eine Kehrtwende schneller wäre. Es macht Ihre Route angenehmer.

- Bearings

Bearings filtert die Segmente des Straßennetzes, an denen ein Wegpunkt prinzipiell ansetzen kann. Sie kann als kommagetrennte Liste an die API übergeben werden. Sie besteht aus einem oder zwei Gleitkommawerten, wobei der erste Wert die Peilung und der zweite die zulässige Abweichung von der Peilung angibt. Die Peilung kann Werte zwischen 0 und 360 im Uhrzeigersinn von Nord annehmen.

- Radiuses

Mit Radiuses können Sie die Suche von nahe gelegenen Straßensegmenten zu einen vorgegebenen Wegpunkt beschränken. Die Werte werden in Metern angegeben und müssen größer als 0 sein. Der Wert -1 gibt keine Begrenzung für die Suche an.

Weitere neue API Parameter sind in Arbeit und werden in Kürze zur Verfügung gestellt.

http://openrouteservice.org
Openrouteservice API: https://go.openrouteservice.org/
Openrouteservice API documentation: https://app.swaggerhub.com/apis/OpenRouteService/ors-api/4.4

GIScience Research Group, Heidelberg University

Heidelberg Institute for Geoinformation Technology (HeiGIT)
http://heigit.org

Crowdsourcing for Urban Geoinformatics

Aims and Scope
Modern mobile devices are pervasively equipped with embedded sensors and cameras, and allow the positioning of media contents within geographic space. In combination with the Web 2.0 paradigm, this has led to the crowdsourcing approach, which in turn has become an important data acquisition technique. It is now possible to collect large amounts of geospatial data in a timely fashion and at low costs, especially in urban areas that feature vast numbers of contributors.

Crowdsourcing thus opens up new possibilities for the disclosure of social processes, and for tackling a range of societal and environmental issues related to urban conurbations. For instance, crowdsourcing allows the integration of user-generated information into urban planning and management workflows—and is thus a crucial step towards the design of smarter and more sustainable cities.

At the same time, crowdsourcing brings new issues to the research agendas: (a) huge amounts of data need to be processed, (b) more thorough interdisciplinary collaboration is needed, and (c) we are facing a general absence of theorizing on crowdsourced geodata and underlying related processes. Further, researchers as well as practitioners are often sceptical about the suitability of crowdsourced data. This is mostly caused by potential quality issues, heterogeneous data characteristics and a lack of user credibility, semantic ambiguities, and potential positional inaccuracies, among others.

Topics

In order to foster the overcoming of the outlined gaps, we call for the submission of papers that address the analysis and application of crowdsourced geographic data, with a specific emphasis on urban research and issues.

We welcome contributions on the following topics:

  • Reviews of the state-of-the-art in using crowdsourced geographic information in urban research, planning, and management.
  • Applications and empirical case studies that investigate urban issues by using crowdsourced geographic data such as OSM, social media data, floating car data, and other types.
  • Data enrichment through crowdsourced geographic data.
  • Extraction of 3D information from crowdsourced geographic data (e.g., from Kinect data, OSM data).
  • The analysis of human behaviours for emergency (disaster) management, tourism, or urban planning and management.
  • Quality assessment for crowdsourcing geographic data.
  • Further topics are welcome if they fit the overall theme.

Submission Guidelines

Manuscripts should be submitted online: here.

Submitted articles should not have been published previously, or be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are refereed through a peer-review process. All accepted manuscripts will be published open access in GSIS.

All article publishing charges (APC) will be covered by Wuhan University, so you can enjoy the benefits of publishing open access at no cost. Authors are recommended to prepare their manuscript by following the full instructions for authors: here.

Important Dates:

Submission deadline of finalized manuscripts: November, 2017
Deadline of print-ready version: April 30, 2018
Expected inclusion in an issue: June−August, 2018

Editorial information

Submit your paper to Geo-spatial Information Science (GSIS), an open access journal by Taylor & Francis with no article publishing charge (APC)!

Special issue call for papers: Crowdsourcing for Urban Geoinformatics

Just recently the GSIS Special Issue on “VGI Analytics” has been published including our article on The OpenStreetMap folksonomy and its evolution by Mocnik, Zipf and Raifer.

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