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1 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
E-Learning Everywhere With Podcasts –The CityGML Training Course For Mobile Devices
Gerhard KÖNIG, Robert KADEN, Thomas H. KOLBETechnische Universität Berlin
2 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
Agenda
E-Learning Everywhere With Podcasts –The CityGML Training Course For Mobile Devices
CityGML Mobile Learning Podcasts Realisation Conclusions
3 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
The Official 3D City Model of Berlin
www.3d-stadtmodell-berlin.de
3D visualization of Berlin‘s 3D city model
modelled according toCityGML
4 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
CityGML – Modelling Urban Spaces
Never heard about CityGML – what‘s that?
Data model and exchange format for virtual 3D city and landscape models
Data model (UML) according to ISO 191xx standard family
GML 3 application schema Modelling of all relevant parts of the virtual city according to
their semantics, geometry, topology and appearance (buildings, vegetation, water, terrain, traffic etc.)
5 discrete scales (Levels of Detail, LOD)
5 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
Multi-Scale Modelling
LOD 4 – Interior model„Walkable“ architectural models
LOD 3 – City / Site modelDetailed architectural model
LOD 2 – City / Site modelExplicit roof structures
LOD 1 – City / Site model„Block model“ without roof structures
LOD 0 – Regional model2.5d Digital Terrain Model
6 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
History
Developed since 2002 by the Special Interest Group 3D (NorthRhine Westphalia, Germany)
Members from >70 companies, municipalities and research institutions
From the fields ofCadastre / Topographic Mapping,Urban Planning, Building Information Modelling,Mobile Telecommunication, Environmental/Training SimulationCar Navigation, Tourism,Geoinformation and Computer Science, …
CityGML 1.0.0 - International Standard since August 2008
7 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
CityGML‘s way to become an OGC standard
CityGML 0.4.0OGC Best Practices Paper
CityGML 1.0.0 (Proposal)OGC Request for Comments
CityGML 0.3.0OGC Discussion Paper
2007-05-30
2008-02-04
2006-03-06
2008-02-192008-03-20
CityGML 1.0.0OGC Implementation Specification(after final OGC TC vote)
2008-08-20
<<<<<<< Public Comment Phase >>>>>>>
International Standardnow
8 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
Application Domain Extensions (ADEs)
CityGMLADEs
XML
NoiseSimul. Disastermanagement
ALKIS ATKIS[NAS] ...
. . .CityGML
GML
ISO
191
xx
9 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
Main Building TU Berlin
Coherent Building Model in Level of Detail 4
10 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
CityGML - Lecture on Demand - Search
www.igg.tu-berlin.de/courses
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• Using learning material everywhere and every time
• Can enhance students’engagement, increase motivation and assist active and independent learning at own pace
Why Mobile Learning?
• Mobility and multimedia capabilities of actual ordinary portabledevices like mobile phones are sufficient
• Comprises methods and techniques which are suitable for handling learning material
12 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
• Suitable for m-learning to bring learning material to the user’s mobile devices
• Open for anybody to share ideas or knowledge with the world
• Can be one minute long or up to hours
Using Podcasts for Mobile Learning
• Only requires a free podcatcher program (e.g. iTunes or any desktop or mobile browser) and a media player
• After loading to the device it can be played offline, anywhere and any often
13 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
Producing Podcasts
Create Media File Write RSS Feed
Podcast
Choose appropriate audio or video format Audio Podcasts: MP3 Video Podcasts: MP4
Small file size by optimal codec, frame size, and bit rate, etc. (1MB - 200MB)
Media file need to be available on the web
Really Simple Syndication (RSS)
RSS feed is stored as text file using standardized XML
Metadata containing author, summery etc. and URL to media file
Feed file need to be available on the web
14 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
• Make the RSS feed and media file available on your web server
• Check functionality by browsing your RSS feed with your internet browser
• RSS feed can be published to be available for everyone On your own web pages Or web services like iTunes
Store or iTunes U (Figure: CityGML course in iTunesStore on iPod)
Making your Podcast Available
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Mobile Devices - OS Diversity
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Choosing Appropriate Format - Audio Settings
Bit rate Frequency rate Channels
Music in near CD-Quality 128 kbps 44,1 kHz stereo
Voice in CD-Quality 96 kbps 44,1 kHz mono
Voice in Standard Quality 64 kbps 22.05 kHz mono
MP3 standard is supported by all multimedia capable handheld devices.
Higher quality at similar bit rate are based on the Advanced Audio Codec (AAC).
Guideline for setting the parameter bit rate and frequency rate to obtain reasonable sound quality for mono or stereo MP3 files
17 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
Choosing Appropriate Format - Video Settings
Image size Frames per s Bit rate
Highest Quality 640x480px 30 fps 2.5 MBit
High Quality 480x320px 30 fps 2.5 MBit
Standard Quality 480x320px 24 fps 1.3 MBit
Economy Quality 320x240px 15 fps 0.5 MBit
MPEG-4 Advanced Video Coding (AVC), also known as MPEG-4 Part 10, represents the latest, most efficient video coding standard.
Recommended standard video settings for mobile devices
18 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
Creating video podcasts
Real Lecture(PowerPoint presentation with speech)
Recording Lecture
Apply Speech to Text
Raw ScriptPowerPoint (Storyboard)
Corrections Optimisation
Apply Text to Speech Programming Time Scale
Video Podcast(MP4)
Audio Video
Output
Source
19 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
Mediafile
CityGML Podcast as MP4 Video
Mediafile
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RSS Feed
<rss version="2.0"><channel><title>CityGML e-Learning Podcast</title><description>Mobile training course on CityGML</description><link>http://www.igg.tu-berlin.de</link><lastBuildDate>Tue, 02 Aug 2009 08:42:43 +0100</lastBuildDate><generator>Feeder 1.5.10(880)</generator>
...<category>Education</category>
<item><title>Section 1 – Introduction to CityGML</title><link>http://www.igg.tu-berlin.de/podcasts</link><description>Overview CityGML</description><author>[email protected] (Robert Kaden)</author><enclosure url=http://www.igg.tu-berlin.de/podcasts/section1.mp4length="4538745" type="video/mp4” />
</item></channel>
</rss
Mediafile
RSS Feed
21 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
Subscribe CityGML Podcast
http://www.igg.tu-berlin.de/podcasts/rss.xml
Mediafile
RSS Feed
Test
22 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
Submit Podcasts
Mediafile
RSS Feed
Test
Submithttp://www.igg.tu-berlin.de/podcasts/rss.xml
23 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
Subscribe CityGML Podcast
Mediafile
RSS Feed
Test
Submit
Subscribe
Download
24 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
Subscribe CityGML Podcast
25 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
CityGML Video Podcast on Selected Devices
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Summary
Identify a way how to setup podcasts
based on existing university lectures
using synthetic voice
with justifiable effort
easy to update
allowing for sustainabilityApple Store, 5th Avenue in New York, April 3, 2010
Since podcasts are available for few weeks no statements can be made concerning acceptance and success. We are confident that learning with mobile devices is particularly suitable for online training of young people.
27 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
Further questions ??
28 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010
Call forParticipationwww.3dgeoinfo.org
Announcement of the 5th International Conference on 3D Geo Information
3D GeoInfo 20103-4 November 2010, Berlin, Germany
www.3dgeoinfo.org Full paper submission: Extended abstract submission:
Notification of full paper acceptance: Notification of extended abstract acceptance:
Camera ready submission:
16 May 201023 May 201018 June 201002 July 201006 August 2010