The memory of the architect: archiving 2D and 3D born digital architectural archives
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Transcript of The memory of the architect: archiving 2D and 3D born digital architectural archives
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The memory of the architect creation and preservation of born digital
architectural archives
Henk Vanstappen, immd.be
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CVAa:
Centre of expertise coordinating the archiving of private documents on the
architectural heritage in Flanders.
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research questions
¤ survey: how are digital architectural archival records created and managed?
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research questions
¤ survey: how are digital architectural archival records created and managed?
¤ case study: what steps are necessary at ingest and preservation?
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1.
survey
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8',)"9$.($4:+,*-&#$)*($&"#$;"(#,'7$63**78"$<,-&.#"-#'',*,-&.")"(
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objectives
¤ understanding of process of creation and management of digital archives.
¤ anticipate problems with digital sustainability.
¤ exploring possible win/win solutions.
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design proces?
“Designing is done with pencil and paper. The CAD drawing is made by an employee.”
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design proces?
“Designing is done with pencil and paper. The CAD drawing is made by an employee.”
“We import an AutoCAD drawing into Sketch-up and convert it to 3D. The result is printed and updated with marker pen. We
scan it again and edit it further in Photoshop.”
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lesson #1
An understanding of the design process is a prerequisite to make decisions on
preservation actions.
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importance & use?
“Our archive is a tool we use daily.”
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importance & use?
“Our archive is a tool we use daily.”
“Files are moved to the basement once the acceptance is signed. We’ll only consult it in
case of a legal dispute”
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lesson #2
Tell me how you use your archive, and I’ll tell you how well it’s ordered.
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lesson #3
Once a file is older than 10 years, attention and care declines dramatically.
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file format obsolesence?
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file format obsolesence?
“Sometimes files can’t be read. We then try to find a printed version and scan it.”
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CAD software
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lesson #4
Architects have little issues with compatibility of files, formats and software
– for now.
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security & back-up?
“Yes, it’s something we should do.”
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lesson #5
Some architects like to live on the edge.
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2. case study
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>?@A'
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projects
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Christian Kieckens, HOUSE VM-D, OUDENBURG Restructuring of a farm house (1995-2001)
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file analysis
¤ 5 projects files
¤ >20,000 files
¤ up to 65% duplicate files
¤ quasi duplicates (e.g. pdf)
¤ 73 different file formats
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media
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media
Apple 655-0394 Quantum Fireball 1.2GB 50-Pin SCSI Hard Disk Drive
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file format identification
unrecognized file formats (DROID v6.01)
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vector formats variants
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C+/(("(% ,$$.DEE*,&2=*B=10E.+"2"+4*$'/(EB*&F.+"2"+4*$'/(F,*(&3//0=+$;%%,$$.DEE"(=)'0'."&'*=/+#E)'0'E5678%%
%
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C"2B,+'J4'(#% NCO%'2%""(%3"2$*(&2;/+A**$%4//+%,"$%&";'('V+"(%4*(%#"/A"$+'2B,"%4/+A"(=%W"$%'2%'(%2$**$%(**2$%./!-#/("(%"(%#"*4*(B""+&"%0+/AA"(%9:/*!2%XYLC8<U%//0%$"KF
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%>?% ,$$.DEE)))=&""!'.=B/AEZ.[\H\]%%
divergent versions of IGES file format
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the treats
¤ obsolete / divergent file formats
¤ obsolete / licensed software
¤ obsolete operating systems
¤ obsolete hardware
¤ obsolete media
¤ bitrot
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preservation file format?
¤ open format
¤ usage and software libraries
¤ geometry vs. intelligence (e.g. layers)
¤ reversibility
¤ external reference files (x-refs)
¤ … and try to keep it simple
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incompatibility 1
how to define a circle...
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incompatibility 2
how to define a sphere (tesselation issue)
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testbed
¤ matrix formats & software migrations
¤ visual check (!)
¤ reversibility tests
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migrate 2D vwx
VWX (native)
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migrate 2D vwx
VWX > DWG: tesselation
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migrate 2D dwg
DWG (native)
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migrate 2D dwg
DWG > DXF
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migrate 2D dwg
DWG > STEP: intelligence lost
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migrate 2D dwg
DWG > VRLM: more intelligence lost
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migrate 3D skp
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migrate 3D skp
skp > dwg: look & feel lost
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reversibility 3D skp
skp > dwg > skp intelligence lost
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reversibility 3D skp
skp > dwg > skp: stairs lost too...
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turnkey?
availability openess intelligence other
3DM ✖ ✖
COLLADA ✖
DGN ✖ ✖
DWG ✖ ✖
DXF ✖ ✖ ✖
IFC ✖ ✖ ✖
IGES ✖ ✖
OBJ ✖ ✖ ✖
PDF/A-‐2/3 ✖ ✖
PDF/E ✖ ✖
PDF/E-‐2 ✖
PRC ✖ ✖
STEP ✖ ✖
SVG ✖
U3D ✖ ✖
VRML ✖ ✖
XRD ✖
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3.
conclusions
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recommendations 1
archival practice:
¤ document design process
¤ document hard- en software use
¤ redefine selection policies
¤ anticipate
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recommendations 2
preservation strategy:
¤ no turnkey solution ¤ define users
¤ define users’ expectations
¤ define significant properties
¤ define migration pathway
¤ quality control
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recommendations 3
expertise & research needs: ¤ update file format registries ¤ update file format identification tools ¤ document conversion methods & tools ¤ develop validation tools & tools ¤ develop CAD – qualified repositories ¤ research emulation strategies ¤ share expertise
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www.immd.be/files/CVAaSurvey_rapport_final.pdf
www.immd.be/files/CADarchivering_rapport_final.pdf