what does 'realistic' mean? 3d realisation

June 2010

CityGRID 2009Intelligent 3D data management

Session 4: Visualisation of Place

What does ‘realistic’ mean?

The issues relating to defining the accuracy of 3D

digital representation of a place.

“Is a national 3D data set a solution looking for a

problem?” 26th May 2010 @ #ospe

John Carpenter, Head of Product Management

Ordnance Survey

Source: Flickr / Digitalpimp

Source: Flickr / I Like

Source: Flickr / Ed Yourdon

Source: Flickr / Wonderlane

Source: Met Geo Info / City of Linz

Source: PB / Eberhard

Source: Flickr / DavidChief

3D Good / 2D Bad?

• To improve decision making, and

• To save time and money in the decision making

process

– Information management

– Conservation

– Urban planning

– Public consultation

Information Management

Conservation

Urban Planning

Public Consultation

Public Consultation

Public Consultation

Public Consultation

Public Consultation

• Solid models:

Source: Met Geo Info / City of Zagreb

Source: Flickr / Laineys Repetoire

Position

Source: Flickr / Betenoir

Geometry

Source: Flickr / Salvadhor

Source: Flickr / Miss Tessmacher

Texture

Source: Met Geo Info / City of Glasgow

Source: C3 Technologies / City of Vas

Source: C3 Technologies / City of Vas

Source: Flickr / Olivander

• CityGML v.1.0 (August 2008)

• OGC Standard

• Developed & promoted by the 3DSIG

LoD 1LoD 2LoD 3

Level of Detail (LoD):

LOD: Scalable solutions

according need

Application:

Data Source:

Topographic

mapping

Aerial

photogrammetry or

airborne laser

scanning

LoD 1.5

Generalised Roof Model

LoD 1

Block Model

LoD 2

Roof Model

LoD 3

Detailed Roof Model

LoD 4

Interiors

Aerial

photogrammetry or

airborne laser

scanning

Detailed aerial

photogrammetry

Façade

photographs and

3D TLS of

complex buildings

Construction plans

or

surveying

Noise protection,

large area city

planning

Local area city

planning,

project

development

Project

development,

architectural

documentation,

cultural heritage.

Homeland security,

asset management

• CityGML v.1.0 (August 2008)

• OGC Standard

• Developed & promoted by the 3DSIG

• Globally adopted?

– IFC (BuildingSMART)

– Integration with BIM

Michael Schlosser

(Geospatial Technical Specialist Autodesk)

• “..3D GIS is about making it easier for the users

of the information and not the CAD and GIS

gurus.

• “..It’s about an easier way to analyze, visualize

and communicate information about our 3D

world.”

@rollohome