E-Learning Everywhere With Podcasts – The CityGML Training ... 09... · 1 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010 E-Learning

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


Agenda

E-Learning Everywhere With Podcasts –The CityGML Training Course For Mobile Devices

CityGML Mobile Learning Podcasts Realisation Conclusions


The Official 3D City Model of Berlin

www.3d-stadtmodell-berlin.de

3D visualization of Berlin‘s 3D city model

modelled according toCityGML


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)


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


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


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


Application Domain Extensions (ADEs)

CityGMLADEs

XML

NoiseSimul. Disastermanagement

ALKIS ATKIS[NAS] ...

. . .CityGML

GML

ISO

191

xx


Main Building TU Berlin

Coherent Building Model in Level of Detail 4


CityGML - Lecture on Demand - Search

www.igg.tu-berlin.de/courses


• 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


• 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


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


• 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


Mobile Devices - OS Diversity


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


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


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


Mediafile

CityGML Podcast as MP4 Video

Mediafile


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


Subscribe CityGML Podcast

http://www.igg.tu-berlin.de/podcasts/rss.xml

Mediafile

RSS Feed

Test


Submit Podcasts

Mediafile

RSS Feed

Test

Submithttp://www.igg.tu-berlin.de/podcasts/rss.xml



Mediafile

RSS Feed

Test

Submit

Subscribe

Download




CityGML Video Podcast on Selected Devices


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.


Further questions ??


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

Documents

E-Learning Everywhere With Podcasts – The CityGML Training ... 09... · 1 König, Kaden, Kolbe: E-Learning everywhere with podcasts – ISPRS Com VI Enschede 04/06/2010 E-Learning