How the photogrammetry process works from start to finish and the benefits from using accurate as-built data.

1. Presentation

2. Photogrammetry
Presentation
What is Photogrammetry ?

3. Photogrammetry
Presentation
“Precise, non-contact, optical and
three dimensional system for
generation of 3D models
from plant photographs”

4. Photogrammetry
Offset History
Presentation
Offset Services Limited Established 1983
Commenced Photogrammetry Development 1985
Offset Develops and Supplies the
Best available and most cost Effective Technology
Location
Offset: Warrington, UK
Joint Venture Partners:
ACS: Irvine, CA and Houston, TX
Acumod: Vancouver, Canada
Eutech: Billingham, UK

5. Photogrammetry
Satisfied Customers
Presentation
Process
Defence
Civil

6. Photogrammetry - Process
Satisfied Customers
Presentation
Nuclear
Offshore
Pharmaceutical
Petrochemical
Pulp & Paper
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7. Photogrammetry - Defence
Satisfied Customers
Presentation
Aerospace
Artillery
Marine
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8. Photogrammetry - Civil
Satisfied Customers
Presentation
Buildings
Interiors
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9. Photogrammetry - Nuclear
Satisfied Customers
Presentation
Shinseigiken, Surveying Machine for Tepco, Japan
Esic, Cherbourg, COGEMA, France
IHI, Japan
MHI, Japan
Aldermaston, Weapons Research
British Nuclear Fuels Ltd,
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10. Photogrammetry - Offshore
Satisfied Customers
Presentation
EPMI, Irong Barat Platform
Samarang,
Philips
Mobil
Shell
Seligi
Pulia
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11. Photogrammetry - Pharmaceutical
Satisfied Customers
Presentation
Elomatic Finland, Pharmacia and Upjohn, Sweden
Merck, SSO building, Rahway, NJ, USA.
ICI
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12. Photogrammetry - Petrochemical
Satisfied Customers
Presentation
Marathon, Neste Oil, Finland
Procter and Gamble, Amine oxide expansion, Kansas
Dow Chemical, Orion project, Texas - 5 jobs
Eutech, (ICI, Rohm & Haas, Air Products, DuPont)
Procter and Gamble, Amine Oxide Expansion, Kansas
British Petrolium
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13. Photogrammetry – Pulp & Paper
Satisfied Customers
Presentation
Procter and Gamble, Machine 10, Green Bay, USA
Inovx solutions support for 3m paper project
Jaako-Poyry, Metsa Botnia, Joutseno paper
pulp,
Finland
QPS, Arjo Wiggins, London
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14. Photogrammetry - Aerospace
Satisfied Customers
Presentation
HVR, Lynx, GKN Westland Helicopters
HVR, Hawk Aircraft for DERA
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15. Photogrammetry - Artillary
Satisfied Customers
Presentation
HVR consulting svcs, 4.5” inch gun and hydraulics
VSEL, Barrow
HVR, Warrior turret for GKN Defence
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16. Photogrammetry - Marine
Satisfied Customers
Presentation
HVR, survey of a compartment of HMS Chatham
HVR, nuclear submarine, Vanguard class, (vengeance)
HVR, bridge of type 23 frigate
HVR, DERA signature modelling HMS Westminster,
Plymouth
DERA Winfrith, Superstructure of R.V. Triton
Vosper Thorneycroft, Canoe, Hasler
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17. Photogrammetry - Buildings
Satisfied Customers
Presentation
Historic Doorway, English Heritage, Manchester
Malasyian Theme park, Roger Dean.
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18. Photogrammetry - Interiors
Satisfied Customers
Presentation
Voyager of the seas, Port of Miami, Florida
Ecstasy, Port of Miami, Florida
Fantasy, Port of Miami,
Florida
Sovereign of the seas, Port of Miami, Florida
For Deltamarin, Finland
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19. Photogrammetry
Capturing Plant Data: Applications
Presentation
Engineering
Simulation
Constructability
Analysis
Inspection
Information
Management

20. Photogrammetry
Capturing Plant Data: Benefits
Presentation
On-Site Savings
3D CAD Savings
Increase Safety
Increased Accuracy
Decrease Rework

21. Photogrammetry
Capturing Plant Data: Benefits
Presentation
Capturing Plant Data Benefits
Better Faster Cheaper Safer
Requires Less
Increases Time Than Avoids
Accuracy and Physical Minimizes Personnel
Reliability Measurement Work Exposure
70-80% Cost Reduction in Data Collection
20-30% Cost Reduction in CAD Modeling

22. Photogrammetry
Presentation
I.Planning IV. Analysis MaganNTTM
Planing Graphics
Photo Magan JrTM
View
CDROM
Object
Database V. Analysis
Surveying Visual Manager
Data Database
Photography MaganNTTM
Neutral File
Format
II.Site Work III. Modeling
Movies Computer Intergraph Bentley CADCentre EA Systems
-Vision PDS Microstation PDMS PASCE
All stages in this
process can be VI. Engineering
modified to suit Simulation Autodesk Autodesk
a particular site. Info. Mgmt. AutoCAD 3D AutoCAD 2D

23. Photogrammetry
I. Planning
Presentation
Main Considerations
• Scope of Work
• Detail Level Required
• Lead Time
• Working Conditions - Hot Work, Weekends etc
• Cost (Display Cost Curve)
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24. Photogrammetry
II. Sitework
Presentation
Sitework Involves
• Setting Out Survey
• Free Stations
• Measuring Photo Control Points
• Taking Overlapping Stereo Photopairs
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25. Photogrammetry II. Sitework: Surveying
Presentation
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26. Photogrammetry II. Sitework: Surveying
Presentation
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27. Photogrammetry II. Sitework: Surveying
Presentation
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28. Photogrammetry II. Sitework: Photographing
Presentation
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29. Photogrammetry II. Sitework: Photographing
Presentation
Four targets are placed in
the area of each
photopair. This allows
the software in the office
to calculate the positions
of the cameras when the
photopairs were taken
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30. Photogrammetry II. Sitework: Photographing
Presentation
Four targets are placed in
the area of each
A pair of photographs is
photopair. This allows
the software in the left
then taken fromthe office
to calculate right which
and then thethe positions
contain the same four
of the cameras when the
points, this were taken a
photopairs is known as
photopair.
Left photograph taken Return to Main Slide

31. Photogrammetry II. Sitework: Photographing
Presentation
Right photograph taken Return to Main Slide

32. Photogrammetry
II. Sitework: Setting Out Survey
Presentation
Points Surveyed to Allow Stations Anywhere in the Job
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33. Photogrammetry
II. Sitework: Free Stations
Presentation
Stations can be set up using original survey points
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34. Photogrammetry
II. Sitework: Photo Control Points
Presentation
Station then used to Survey Photo Control Points
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35. Photogrammetry
II. Sitework: Stereo Photopairs
Presentation
Overlapping Photopairs taken to cover all over objects
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36. Photogrammetry
III. Modelling
Presentation
Modelling Involves
• Transfer of Survey Data to Magan
• Scanning Photopairs
• Modeling Photopairs in MaganNT
• Cutting CDROMs of Photopairs and Models
• Preparing a MaganJr Visual Database
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37. Photogrammetry
Magan:- PC Based 3-D Data Acquisition Software
Presentation
Images are downloaded to desktop or laptop computers
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38. Photogrammetry
III. Modelling: Scanning Photopairs
Presentation
Photopairs are produced Images which can
be viewed and interrogated in WindowsNT
Each Image produces 3040*2473 pixels, the example pair
would be ≈6MB in total
Reasons for Colour Images
•On-Site Processing Data Verification
•Realistic Data Tracking
•Size of Scanned Files
•Reduced Time For enhancement Return to Main Menu

39. Photogrammetry III. Modelling
Presentation
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40. Photogrammetry III. Modelling
Presentation
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41. Photogrammetry III. Modelling: Create a Photopair Element
Presentation
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42. Photogrammetry III. Modelling: Import Survey Data
Presentation
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43. Photogrammetry III. Modelling: Load Photopair
Presentation
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44. Photogrammetry III. Modelling: Identify Target Positions
Presentation
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45. Photogrammetry III. Modelling: Identify Parallax Positions
Presentation
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46. Photogrammetry III. Modelling: Survey Positions Calculated
Presentation
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47. Photogrammetry III. Modelling: Camera Positions Calculated
Presentation
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48. Photogrammetry III. Modelling: Accuracy of Photopair Calculated
Presentation
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49. Photogrammetry III. Modelling: Elements Created from Photopairs
Presentation
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50. Photogrammetry III. Modelling: Elements Created from Photopairs
Presentation
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51. Photogrammetry III. Modelling: Elements Created from Photopairs
Presentation
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52. Photogrammetry III. Modelling: Elements Created from Photopairs
Presentation
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53. Photogrammetry III. Modelling: Elements Calculated from Points
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Elements Overlayed to Verify Accuracy and Model Completeness Return to Main Menu

54. Photogrammetry III. Modelling
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55. Photogrammetry III. Modelling
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56. Photogrammetry III. Modelling
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57. Photogrammetry III. Modelling
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58. Photogrammetry III. Modelling
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59. Photogrammetry III. Modelling
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60. Photogrammetry III. Modelling
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61. Photogrammetry III. Modelling
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62. Photogrammetry III. Modelling
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63. Photogrammetry III. Modelling: Modeling Photopairs
Presentation
Photopairs are
modelled by
referencing the
target positions in
the photopairs with
real world positions
collected from the
site with the
theodolite.
This enables the
cameras position to
be calculated.
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64. Presentation
Cost/Completeness
Cost
100%
0%
Completeness
97%
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65. Photogrammetry
Typical On Site Photographs
Presentation
These photopairs are taken from site to enable the
extraction of accurate 3D As-Built data for transfer
into Customers CAD system, such as PASCE
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66. Photogrammetry Transfer from Magan
Presentation
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67. Photogrammetry Transfer into PASCE
Presentation
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68. Photogrammetry Transfer into PASCE
Presentation
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69. Photogrammetry Transfer into PDMS
Presentation
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70. Photogrammetry Transfer into Review
Presentation
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71. Photogrammetry Transfer into Microstation
Presentation
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