Report on the EuroSDR CityGML Project

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Nov 15, 2013 (3 years and 10 months ago)

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Institut für Kartographie und Geoinformation, Uni Bonn

Lehrstuhl für Geoinformation

Report on the EuroSDR CityGML Project

Dr. Thomas H. Kolbe

June 1st, 2006


T. H. Kolbe: CityGML Project


EuroSDR Meeting in Stockholm 6/2006

2

Background (I): Situation in Europe

Work on 3D city modelling and standardization

very strong in Europe


Internat. Alliance for Interoperability, Modeling WG


Project IFC for GIS (Norway)


3D cadastre (TU Delft, Netherlands)


Switzerland will switch to 3D Digital Landscape
Models


3D city modeling investigated by many Universities


also much research on 3D GIS, 3D geodatabases


T. H. Kolbe: CityGML Project


EuroSDR Meeting in Stockholm 6/2006

3

Background (II): Situation outside Europe


3D city models adopted by companies in
Japan
;

however, only proprietary solutions


3D City Modeling is gaining attention in
USA


New project: National Building Information Model


Google Earth (Microsoft will follow soon)


OGC WG CAD<
-
>GIS Interoperability


Official cooperation of OGC <
-
> IAI


Advent of world
-
wide 3D navigation systems


Singapore
: automatic validation of AEC/FM designs


China

has strong interest in acquisition and usage
of 3D City Models


T. H. Kolbe: CityGML Project


EuroSDR Meeting in Stockholm 6/2006

4

EuroSDR CityGML Project (I)


Background (III)


need for standardization of virtual 3D city models


no standard had been available so far


SIG 3D

of the initiative Geodata Infrastructure North
-
Rhine Westphalia (
GDI NRW
) started to work on
CityGML

in
2002


in a Public Private Partnership (about 70 partners)


(N)MCAs, municipalities, companies, universities


Participants from Germany, UK, Switzerland, and
Austria


However:
no English documentation

was available;
discussion mainly within Germany


T. H. Kolbe: CityGML Project


EuroSDR Meeting in Stockholm 6/2006

5

About CityGML


CityGML is a
common information model

for virtual
3D city / landscape models


covering different
thematic aspects

(buildings,
vegetation, water bodies, terrain, transportation etc.)


applicable to many different application domains


implemented as an
application profile for GML3


CityGML

represents


Geometry, Topology, Semantics
,
and

Appearance


5
consecutive

Levels of Detail


3D Volumetric

and
Multisurface

objects


DTM

in a flexible way (Raster, TIN, Masspoints,
Breaklines)


T. H. Kolbe: CityGML Project


EuroSDR Meeting in Stockholm 6/2006

6

Coherent geometr./semantic aggregation

Building

Building installation
(dormer)

Building part

Building part

Building

Wall surface
(exterior)

3D
-
Modell: Stadt Coburg


T. H. Kolbe: CityGML Project


EuroSDR Meeting in Stockholm 6/2006

7

Geometry / topology model


3D object geometries in
absolute world coordinates


furthermore: simple prototype instancing mechanism


Multiple referencing
of geometry (components)


realizes topological & semantic relations


redundancy free description of space and surfaces possible,
thus no overlaps occur

Surface is part of

the geometries of the
bridge object and the
road object

© Rheinmetall Defence Electronics


T. H. Kolbe: CityGML Project


EuroSDR Meeting in Stockholm 6/2006

8

EuroSDR CityGML Project (II)


Aim of the project


Starting the dicussion on standardization of

virtual 3D city models within Europe


Identify further demands of European cities / bodies
and future customers


Ensure a major role for Europe regarding the
international development of 3D City Models


Synchronize with international developments in OGC


Project layout


2 Phases: 1st phase from 12/2005


8/2006


T. H. Kolbe: CityGML Project


EuroSDR Meeting in Stockholm 6/2006

9

EuroSDR CityGML Project (III)


Current status (phase 1 in progress)


CityGML specification draft

has been translated /
refined


Questionnaire

to EuroSDR has been prepared


Spec. and questionnaire have been distributed to
EuroSDR members (02
-
05
-
2006)


(until now) sparse reactions


Acquisition of
test datasets

still running


some already available on www.citygml.org

(Berlin, Karlsruhe, Castle Herten; dataset from
British OS will be available soon)


T. H. Kolbe: CityGML Project


EuroSDR Meeting in Stockholm 6/2006

10

CityGML dataset in Level of Detail 3

3D
-
Model: Dr. Benner, Forschungszentrum Karlsruhe


T. H. Kolbe: CityGML Project


EuroSDR Meeting in Stockholm 6/2006

11

EuroSDR CityGML Project (IV)


Open issues in phase 1


Evaluation of the answered questionnaires


Definition of the concrete steps for phase 2


bring together the research / working group for
phase II
; identify interested EuroSDR members


Key issues:


How to organize? SIG or WG? Virtual meetings?


Official backing / mission from EU NMCAs?


What is the relation between public and private interests?


Formal cooperation with OGC development


Development of a financing concept


T. H. Kolbe: CityGML Project


EuroSDR Meeting in Stockholm 6/2006

12

OGC Activities


Interest in CityGML has significantly increased


from OGC CTO‘s, president, and testbed leader


from companies like Oracle


Presentations and first discussions in the

OGC CAD/GIS interoperability WG


CityGML will be part of the currently launching
OpenGIS Web Services Testbed OWS
-
4


homeland security application scenario


Submission of CityGML as a Discussion Paper for
the June TC meeting


T. H. Kolbe: CityGML Project


EuroSDR Meeting in Stockholm 6/2006

13

The Road Ahead


3D city models are becoming mainstream!


strong speedup / increase of interest by (esp. US) companies


European interests

must be expressed
in the very near future
,

if they should be reflected in international standards and products


3D geoinformation

will (most likely) be an explicit topic
within the
7th EU framework program


could become the basis for a comprehensive European
cooperation project


CityGML

is one
direct link

between
EuroSDR

and
OGC


Can we get a
formal statement

(now)
of EuroSDR

on
CityGML for the OGC TC meeting in June?


If you are interested in 3D city models: please give us
feedback (e.g. reply to the questionnaire by end of June)