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3DIR: Exploiting
Topological
Relationships in Three-
Dimensional
Information Retrieval
from BIM Environments
Peter Demian,...
• Introduction, The Problem
• Literature
– BIM and CAD
– Topology in Building Models
• Method
• Results
– 3DIR User Interf...
The Problem: Information Overload
The Problem: finding information
• Formulate query
• Identify relevant
information from
index
• Present a ranked list
of s...
…but if our information is linked to a
3D artefact (…BIM)
There might be a better
way to:
• Formulate queries
• Identify r...
Literature: BIM and CAD
• CAD models: geometry
• BIM models can contain much more information
– Attributes of 3D objects
–...
Literature: Topology
• “Study of the way in which constituent parts are
interrelated or arranged”
(Oxford English Dictiona...
Research Method
• “Needs” workshops at “Architects” and
“Contractors”
• Prototype development (Autodesk Revit; good
Applic...
Results: Needs Analysis
Needs Specification
Search by keyword, 3D
volume, by selecting a set of
components, or combination...
Results: Interface
“Select” selected search result
Multiple search
tools (S1)
“Hops” function: search
related items and re...
• A separate list of “Neighbours” saved during
indexing
– Hosting, Touching or Intersecting
• When searching selected (rat...
Results: Evaluation
• 3DIR creates index of all text data attached to a Building Information
Model
• The user is able to search by
– Selecting...
THANK YOU
Free download from link at www.3dir.org
• Late Dr Ann O’Brien
• Brian Mercer Feasibility Award from the Royal So...
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3DIR: Exploiting Topological Relationships in Three-dimensional Information Retrieval from BIM Environments

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These slides are to accompany the paper presented at the ICCCBE2016 conference in July 2016 in Osaka, Japan. They describe the development of the 3DIR app for Revit. 3DIR was augmented to exploit topological relationships in the building model.

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3DIR: Exploiting Topological Relationships in Three-dimensional Information Retrieval from BIM Environments

  1. 1. 3DIR: Exploiting Topological Relationships in Three- Dimensional Information Retrieval from BIM Environments Peter Demian, Kirti Ruikar, Tarun Sahu, Anne Morris Presented by Peter Demian, ICCCBE2016, July 2016, Osaka, Japan Look for this presentation on SlideShare.net
  2. 2. • Introduction, The Problem • Literature – BIM and CAD – Topology in Building Models • Method • Results – 3DIR User Interface – Exploiting Topology in 3DIR – Evaluation of augmented 3DIR • Conclusions Outline
  3. 3. The Problem: Information Overload
  4. 4. The Problem: finding information • Formulate query • Identify relevant information from index • Present a ranked list of search results
  5. 5. …but if our information is linked to a 3D artefact (…BIM) There might be a better way to: • Formulate queries • Identify relevant information • Present search results
  6. 6. Literature: BIM and CAD • CAD models: geometry • BIM models can contain much more information – Attributes of 3D objects – Nongeometric objects • 3D model not fully exploited as a visual index, no information scent (Pirolli &Card 1999)
  7. 7. Literature: Topology • “Study of the way in which constituent parts are interrelated or arranged” (Oxford English Dictionary) • Mathematics: topology is the study of a collection of open sets • Spatial modelling: topology is concerned with notions of “interior”, “boundary”, or “exterior”. • For us: any relationships between 3D building elements in a model which may enhance information retrieval: – Strictly topological ,concerned with interior/boundary/exterior – More general spatial/directional relationships – Or even relationships in general
  8. 8. Research Method • “Needs” workshops at “Architects” and “Contractors” • Prototype development (Autodesk Revit; good Application Programming Interface) • 3DIR augmented to exploit topology – Hosting – Touching – Intersecting • “Evaluation” workshops
  9. 9. Results: Needs Analysis Needs Specification Search by keyword, 3D volume, by selecting a set of components, or combination Multiple search modes needed: Information about selected component(s) Filter by keyword, by selecting desired 3D components or by specifying a 3D volume.(S1) Searching beyond selected 3D objects, based on relationships components “Hops function”: with single component or collection of components selected, the system can also related 3D components (S2) Visualising search results: retain the standard text- based listing, but would also like search results somehow superimposed on the 3D model As many visual representations as the API allows: Text listing Retrieved 3D components are “selected” Retrieved 3D components are isolated Retrieved 3D components are highlighted by insetting a phantom coloured shape above them. computation. (S3)
  10. 10. Results: Interface “Select” selected search result Multiple search tools (S1) “Hops” function: search related items and report “hops” (S2) Multiple search result visualisations (S3) “Isolate” selected search result “Colour” selected search result
  11. 11. • A separate list of “Neighbours” saved during indexing – Hosting, Touching or Intersecting • When searching selected (rather than all) objects – Selected objects containing the search keyword in any of their parameters are shown first in the results table with “Hops” value 0. – Next, neighbors of each of the retrieved objects is also searched. Neighboring objects containing the required keyword are listed in the results table with “Hops” value 1. – Search is repeated recursively on the newly retrieved objects, each time incrementing the “Hops” value. – ..until the maximum number of Hops specified by the user. Results: Exploiting Topology
  12. 12. Results: Evaluation
  13. 13. • 3DIR creates index of all text data attached to a Building Information Model • The user is able to search by – Selecting specific 3D objects – Specifying a spherical region of the model – Entering search keywords • Search results are displayed by – Highlighting 3D objects in the 3D model – Isolating them – Indicating them using a colored balloon shape. • 3DIR+Topology system exploits model topology • 3DIR+Topology, users agree less strongly with positive statements and disagree less strongly with negative statements. • Topology is still useful…. • ….more careful interface design needed to mitigate added complexity Conclusions
  14. 14. THANK YOU Free download from link at www.3dir.org • Late Dr Ann O’Brien • Brian Mercer Feasibility Award from the Royal Society • Loughborough University’s Higher Education Innovation Fund • Autodesk, through Autodesk Developer Network.

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