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Curating Architectural 3D CAD Models
FACADE
Future-proofing Architectural Computer-Aided Design
© MIT
In conjunction with:
Tom Rosko
Head, Institute Archives & Special Collections
MIT Libraries
Society of American Archivists MeetingArchitectural Records Roundtable, August 12, 2009
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2August 12, 2009 © MIT SAA, Architectural Records Roundtable
Problem Statement
Current architectural data is being lost.
CAD (3D) is complex! Highly proprietary, non-standard,
backwards incompatibilities, obsolescence of software and formats
3D digital preservation new territory Lack of tools, standards, approaches
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3August 12, 2009 © MIT SAA, Architectural Records Roundtable
FACADE Project
IMLS grant 2-year (Sept. 2007 – Sept. 2009)
http://facade.mit.edu
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4August 12, 2009 © MIT SAA, Architectural Records Roundtable
FACADE Project Staff
William Reilly ([email protected]) Technical Projects Manager, MIT Libraries
MacKenzie Smith Associate Director for Technology, MIT Libraries
Ann Whiteside Head, Rotch Library for Art and Architecture,
MIT Libraries
William Mitchell (former) Dean, MIT School of Architecture and
Planning
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5August 12, 2009 © MIT SAA, Architectural Records Roundtable
FACADE Project Proposal
Develop optimal long-term archiving strategy for digital architectural data Especially 3D CAD models
Demonstrate in DSpace digital archive With SIMILE user interface discovery tools
Use Frank Gehry MIT Stata Center dataset Advanced 3D CAD tool CATIA
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6August 12, 2009 © MIT SAA, Architectural Records Roundtable
Architecture Data Producers: the landscape
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7August 12, 2009 © MIT SAA, Architectural Records Roundtable
Data Producers: Architecture Firms
Technology
Design
Communications, Management
3D CAD increasing in complexity
“BIM” recent initiative (Building Information Modeling)
Lacking standards for use, naming, interoperation
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8August 12, 2009 © MIT SAA, Architectural Records Roundtable
Building Information Modeling
Buildin
gSM
ART A
llia
nce
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9August 12, 2009 © MIT SAA, Architectural Records Roundtable
What are Firms Doing, re: CAD, digital data?
Not So Good (status quo): Creating lots more CAD every day, but
unorganized
Continuing to rely on proprietary formats for current and mid-term purposes
Not archiving for long-term
Not preparing (don’t know how) materials for archive
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10August 12, 2009 © MIT SAA, Architectural Records Roundtable
What are Firms Doing, re: CAD, digital data?
Good (progress): (Beginning to) recognize the issues
Attempting to make data interchange standards work
Trying to embrace BIM: richer CAD might aid interchange efforts, heighten need for longer-term archive solution
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11August 12, 2009 © MIT SAA, Architectural Records Roundtable
Data Consumers:Audiences
Practice (Architects, Designers, Engineers)
Research (Historians, Scholars)
Teaching (Instructors, Students)
General (Public, Casual)
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12August 12, 2009 © MIT SAA, Architectural Records Roundtable
Use Cases
Practice (Architects, Designers, Engineers)
(Internal) Perform current work; re-use recent work
(External) Data interoperation with partner firms
(“Read Only”) Consult own work
Research (Historians, Scholars)
(Design) Study history of design, “design intent”
(Business) Study process, techniques, economics
Teaching (Instructors, Students)
(Design) Study history of design, “design intent”
(Practice) Study models to learn, extend CAD
(Computation) Capabilities, constraints, on design
General (Public, Casual, Educational)
Study architectural history; view buildings, designs
Blue signifies future use cases
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13August 12, 2009 © MIT SAA, Architectural Records Roundtable
Audiences Consulted
Advisory Board
Architectural historian
3D engineer
World cultural heritage
Architecture faculty
Practicing architects
CAD researcher
Architecture CAD platform CIO
Architecture IT consultant
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14August 12, 2009 © MIT SAA, Architectural Records Roundtable
Audiences Consulted
MIT School of Architecture Faculty and Students
Architecture firms (architects and librarians)
DCC 3D preservation seminars
AIA Congress workshops
CAD vendors discussions
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15August 12, 2009 © MIT SAA, Architectural Records Roundtable
The Content (Data)
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16August 12, 2009 © MIT SAA, Architectural Records Roundtable
Datasets for Project
Frank Gehry, MIT Stata Center Cambridge, Mass. (2004)
CATIA
Moshe Safdie, U.S. Institute of Peace Washington, D.C. (2009)
Revit
Thom Mayne, Caltrans Los Angeles, Calif. (2004)
Microstation
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Data and “Meta” Data
10Ks of files
10s of Gbs
100+ file formats
File system Almost no
metadata
Collab. systems
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Entire data set
Entire architecture/design project
Initial sketches
3D CAD models, 2D CAD drawings
Formal outputs (e.g. client presentations)
Correspondence, RFIs, ASIs, etc.
Consultant reports, obligatory certificates,
documents
Images, video, other media files
Every client issuance
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19August 12, 2009 © MIT SAA, Architectural Records Roundtable
3D CAD
Data Formats; Standards; CAD Tools
Preservation Strategies
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20August 12, 2009 © MIT SAA, Architectural Records Roundtable
Terminology: Geometry
NURBS “Non-Uniform Rational Basis Splines”
Freeform curves, surfaces. Weighted points
Mesh Collection of vertices, edges and faces
http://en.wikipedia.org/wiki/Nurbs
http://en.wikipedia.org/wiki/Polygon_mesh
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21August 12, 2009 © MIT SAA, Architectural Records Roundtable
Terminology: Parametric
Parametric
CATIA
Revit
Microstation
Non-Parametric
Rhino
Maya
“Features” vs. just
underlying geometry
Freeform surface
modeller…
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22August 12, 2009 © MIT SAA, Architectural Records Roundtable
3D CAD Systems in Architecture
Dassault Systemes’ CATIA (Stata Center)
Autodesk’s Revit (U.S. Inst. Peace)
Bentley’s MicroStation (Caltrans)
Vary in parametric modeling v. inert geometry support
Vary in complex (NURBS) v. simple geometry (Mesh) support
How CAD products encode geometric and parametric models is unique and proprietary
Project deliverable: format representation information
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23August 12, 2009 © MIT SAA, Architectural Records Roundtable
Data Exchange Formats
Open, Standards-Based Model Information
STEP (ISO 10303)
IFC (ISO 16739)
Geometry Information
IGES
VRML
STL
Display formats (generally available)
3D PDF
Flash
Various Industry Data Exchange Solutions
Navisworks
Collada
DXF / DWF
DWG / DGN
Viewers
…
Blue signifies formats under study
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24August 12, 2009 © MIT SAA, Architectural Records Roundtable
“Viewing” of dataIn native-format with user’s CAD software
As “static” PDF
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25August 12, 2009 © MIT SAA, Architectural Records Roundtable
3 Derivative Formats: IGES, STEP, 3D-PDF
dd
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IFC Viewer: Solibri
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27August 12, 2009 © MIT SAA, Architectural Records Roundtable
3D PDF: Quick Look
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3D Model Interactivity
If CAD software only exports inert geometry, the original parametric model is lost – i.e. the preservable artifact is not authentic
Does that matter? To the project audience…probably not… to us…yes?!?
Doesn’t fully represent design intent
Can recreate a parametric model later
Can manipulate the model view (e.g. 3D PDF)
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How to sort through and manage all that data?
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The Project Work and Tools
Project Information Model, Workflow
Metadata, “Curators Workbench”
DSpace Archive
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31August 12, 2009 © MIT SAA, Architectural Records Roundtable
Managing the data intellectually
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Ontology
Working from BIM Idea
Created a project information model utilizing RDF
RDF: Resource Description Framework
http://www.w3.org/RDF/
An ontology system using XML to exchange knowledge on the Web (part of the semantic web movement)
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PIM - Project Information Model
Entire architecture/design project
Initial sketches
3D CAD models, 2D CAD drawings
Formal outputs (e.g. client presentations)
Correspondence, RFIs, ASIs, etc.
Consultant reports, obligatory certificates, documents
Images, video, other media files
Every client issuance
Linked together in a relationship map
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35August 12, 2009 © MIT SAA, Architectural Records Roundtable
PIM ontology
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Properties on Objects [1 of 2]
Every File gets five properties
Project Phasee.g. concept, design, construction, etc.
Building Zone/Systeme.g. Stata Center, Gates Tower, 4th floor
Architectural Disciplinee.g. architectural, electrical, mechanical, structural
Document Typee.g. presentation, drawing, communication
File Formate.g. CATIA, AutoCAD, Word, PDF
Prototype Two(latest approach)
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37August 12, 2009 © MIT SAA, Architectural Records Roundtable
Properties on Objects [2 of 2]
Important files further tagged
Specially curated “Selected Objects”
3D models and 2D drawing sets
Client presentations, etc.
Privileged access in user interface
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38August 12, 2009 © MIT SAA, Architectural Records Roundtable
Managing the data “physically”Metadata
Storage
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Concordance of Data Formats
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Curators’ Workbench (CWB)
File object properties assigned
Selected Objects identified
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41August 12, 2009 © MIT SAA, Architectural Records Roundtable
DSpace Archive
Preservation, dissemination, access control
FACADE UI external to DSpace
Bulk ingest tools (e.g. Curators’ Workbench; DSpace “packager” importer)
Format registry integration for technical curation (GDFR, PRONOM, DSpace internal)
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42August 12, 2009 © MIT SAA, Architectural Records Roundtable
High Level Schematic: Data Stores, Data Flows
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43August 12, 2009 © MIT SAA, Architectural Records Roundtable
High Level Schematic: Data Processes
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The “Archive”
Result of current work:
Creating a research/teaching archival collection, not a records repository.
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User InterfaceSIMILE “Exhibit”
SIMILE “Longwell”
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SIMILE tools
SIMILE
http://simile.mit.edu/ Exhibit and Timeline tools
Publishing framework for web display
Longwell
RDF-based faceted browser
http://simile.mit.edu/wiki/Longwell
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47August 12, 2009 © MIT SAA, Architectural Records Roundtable
FACADE Projects Catalog: Carousel View
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48August 12, 2009 © MIT SAA, Architectural Records Roundtable
FACADE Projects Catalog: Timeline View
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49August 12, 2009 © MIT SAA, Architectural Records Roundtable
Caltrans Project “Exhibit”: Tiles View
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50August 12, 2009 © MIT SAA, Architectural Records Roundtable
Exhibit: Timeline, with Popup, Download
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Caltrans “Longwell”: “Starting Points” View
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Longwell: Table View, with Popup
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Longwell: Tiles View, Full Text Search; MS-Word .DOC
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Outcomes of Project (forthcoming…)
INSTITUTIONS:
Open source, production quality software (repository; U/I)
Preservation strategy, format info, for 3D CAD
Ontology, workflow
USERS:
Availability of materials
Improvement over “File System” organization
Some add’l. metadata
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Challenges (an archivist’s view)
Intellectual Property
Rights, Restrictions
Access, Display
What will work, how will it work?
Long-term Preservation
Software; digital preservation in general
Sustainability
How support?
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Next Steps
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Next for MIT
Evaluating work products
Pursue follow-up grant
Focus on digital preservation of 3-D CAD
Pilot Fall 2009
Analyze resources needed
Cataloging/curating
Programming/tech support
Issues (Access, IP, …)
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Final Comments
Opportunities
Tools (ex. Curator’s Workbench) to address large “data” files
Interface developments
Challenges
Scalability
I.P. hurdles
Questions
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Acknowledgement
This project was made possible by a grant from the U.S. Institute of Museum and Library Services
The views and conclusions contained of this presentation are those of the author and should not be interpreted as representing the official policies, either expressed or implied, of the IMLS or the U.S. Government.
http://facade.mit.edu