buildingSMART Technical Room Webinar IFC HDF5

Transcript

1. IFC HDF5
   Thomas Krijnen
   https://speakerdeck.com/aothms
   buildingSMART technical room webinar IFC HDF5 (binary)
   

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2. IFC HDF5
   Intro
   Use cases
   (large datasets, archival, point clouds, sensor data / digital twin)
   Technicalities
   buildingSMART technical room webinar IFC HDF5 (binary)
   

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3. IFC SPF
   buildingSMART technical room webinar IFC HDF5 (binary)
   

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4. IFC SPF
   Advantages: human readable and machine agnostic
   Disadvantages:
   Slow parse speed
   No partial reading
   no order on definitions
   no seeking ahead due to grammar
   buildingSMART technical room webinar IFC HDF5 (binary)
   

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5. In this presentation
   Level of Detail/Development
   http://bimforum.org/wp-content/uploads/2015/11/Files-1.zip
   Huge files with heterogeneous
   contents (e.g point clouds, sensor data)
   Dramatically reduced read times
   buildingSMART technical room webinar IFC HDF5 (binary)
   

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6. Thomas Krijnen
   ✉ thomas@aecgeeks.com
   @aothms
   Owner of AECgeeks, maintainer of IfcOpenShell, researcher at
   TU Delft in the NLs and formerly TU/e.
   buildingSMART technical room webinar IFC HDF5 (binary)
   

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7. HDF5
   Used in scientific computing
   EXPRESS mapping in ISO 10303 26
   Adopted by NASA, Matlab, …
   buildingSMART technical room webinar IFC HDF5 (binary)
   

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8. Use cases
   point clouds; archival; sensor data; …
   

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9. Point cloud usage patterns
   acquisition and remodeling
   hybrid modeling
   as built verification
   structural health monitoring
   Integrated separate storage
   buildingSMART technical room webinar IFC HDF5 (binary)
   

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10. IFC point cloud schema extension
    buildingSMART technical room webinar IFC HDF5 (binary)
    

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11. IFC point cloud planar compression
    buildingSMART technical room webinar IFC HDF5 (binary)
    

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12. Point cloud as deformation height map
    buildingSMART technical room webinar IFC HDF5 (binary)
    

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13. Archival
    Long-term digital preservation properties
    Checksums
    Schema is encoded in serialization (ifc4, ifc4add1, ifc4add2,
    ifc4add2tc1 => IFC4 schema identifier)
    Rapid partial reading and meta-data extraction
    buildingSMART technical room webinar IFC HDF5 (binary)
    

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14. Digital twins: real-time high frequency
    data in HDF5 packet table
    Query and inference on semantic data + high resolution time
    series in standardized and portable container
    buildingSMART technical room webinar IFC HDF5 (binary)
    

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15. Technicalities
    schema mapping; mounting and federation; serialization
    profiles; numbers
    

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16. IFC/EXPRESS in HDF5
    buildingSMART technical room webinar IFC HDF5 (binary)
    

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17. IFC/EXPRESS in HDF5
    buildingSMART technical room webinar IFC HDF5 (binary)
    

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18. IFC/EXPRESS in HDF5
    buildingSMART technical room webinar IFC HDF5 (binary)
    

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19. Read performance vs SPF
    buildingSMART technical room webinar IFC HDF5 (binary)
    

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20. Layers of optimization
    Hierarchical storage of partial file chunks
    Partial decompression (disk i/o typically bottle-neck)
    Binary, fixed-length storage
    buildingSMART technical room webinar IFC HDF5 (binary)
    

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21. Advanced use cases: Mounting and
    groups
    buildingSMART technical room webinar IFC HDF5 (binary)
    

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22. Advanced use cases: Mounting and
    groups
    buildingSMART technical room webinar IFC HDF5 (binary)
    

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23. Serialization profiles
    buildingSMART technical room webinar IFC HDF5 (binary)
    

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24. File size vs SPF
    buildingSMART technical room webinar IFC HDF5 (binary)
    

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25. Read more
    Thomas Krijnen, Jakob Beetz (2020) An efficient binary storage format for IFC
    building models using HDF5 hierarchical data format, Automation in Construction
    113, https://doi.org/10.1016/j.autcon.2020.103134
    Thomas Krijnen, Jakob Beetz (2018) A SPARQL query engine for binary-formatted IFC
    building models, Automation in Construction 95,
    https://doi.org/10.1016/j.autcon.2018.07.014
    Thomas Krijnen, Jakob Beetz (2017) An IFC schema extension and binary serialization
    format to efficiently integrate point cloud data into building models, Advanced
    Engineering Informatics 33 https://doi.org/10.1016/j.aei.2017.03.008
    buildingSMART technical room webinar IFC HDF5 (binary)
    

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26. Get in touch
    ✉ thomas@aecgeeks.com
    @aothms
    buildingSMART technical room webinar IFC HDF5 (binary)
    

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