Appendix Bridging the worlds of CAD and GIS

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AppendixBridging the worlds of CAD and GIS

• Bentley conference, 23-27 may 2004, Orlando,
  Florida USA

Peter van Oosterom1, Jantien Stoter2, and Erik
Jansen1
1) Delft University of Technology, The
Netherlands 2) ITC Enschede, The Netherlands
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Appendix (0)

• Difficult to give definitions of CAD (AEC) and
  GIS on which everyone agrees, it is a continuum
  of spatial functionality there are always
  exceptions
• However, people perceive differences and the main
  use is still different (but this changes over
  time)
• Further, no two CAD systems are equal and the
  same is true for GIS
• Next sheets will contain lists of statements,
  which an indication how true is is perceived 10
  years ago, today and 10 years from now (1not
  true5true)

) In this presentation CAD and AEC are synonymous
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Appendix (1) - 1994/2004/2014(1not true
5true)

• 5/3/1 CAD no attributes, GIS many attributes (via
  DBMS)
• 5/4/3 3D geometry (no topology), GIS 2D with
  topology
• 4/4/3 CAD no model behavior, OO GIS modest start
• 5/3/2 CAD has file size limitations, GIS
  worldwide data sets
• 4/4/4 CAD man-made objects, GIS also natural
  objects
• 4/4/4 CAD single/complex object, GIS many/simple
  objects
• 5/5/5 CAD 2D/3D orthogonal world, GIS coordinate
  systems
• 5/5/5 CAD may (not) be tied to physical world,
  GIS must
• 5/4/3 CAD complex geometries, GIS linear
  primitives

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Appendix (2) - 1994/2004/2014(1not true
5true)

• 5/4/2 CAD and GIS use different concept
  (semantics)
• 5/4/4 CAD design based, GIS data collection based
• 5/4/3 CAD project related, GIS continuous
• 4/4/4 CAD movement within part of object model,
  GIS full spatio-temporal modeling
• 5/4/3 CAD has standard 3D visualization, GIS 2D
• 5/5/4 CAD 3D data input, GIS mainly 2D
• 5/5/4 CAD both indoor/outdoor, GIS outdoor
• 4/3/2 CAD support textures for rendering, GIS not