Laser Scanning Increased Confidence = Reduced Risk

Transcription

1 Laser Scanning Increased Confidence = Reduced Risk

2 Matthew McCarter - Surveyor Working in survey industry 16 years Started laser scanning in 2000 Advisory committee for SPAR EU and GeoBusiness conferences Active in UK BIM community Member of Cabinet Office BIM Task Group Survey4BIM committee Blog on SPAR Point Group Website Speaker at Autodesk 18 March 2014

3 What is a surveyor?

4 Surveyors Many different names: LAND SURVEYOR SURVEYOR GEOMATIC ENGINEER GEOSPATIAL SURVEYOR MEASURED BUILDING SURVEYOR GEOMATICIAN GEOMATIC SURVEYOR GEOSPATIAL ENGINEER

5 What does a Land Surveyor do?... explore the character and structure of spatial information, its methods of capture, organisation, classification, qualification, analysis, management, display and dissemination, as well as the infrastructure and technologies necessary for the optimal use of this information

6 Essentially, we measure distances & angles

7 Our mission is to provide a forum for survey organisations and industry professionals to collaborate and share their journey putting BIM into practice, and to provide best practice CLIENTS VENDORS guidance documents on survey matters relating to BIM.

8 BIM Task Group BIM4 Communities

9 Group Goals Provide leadership in establishing how surveyors are integral to the BIM process Share knowledge and learning between its members Establish collaborative links to Universities and academia Produce and publish best practise guidance on survey matters relating to BIM Coordinate the Survey4BIM activates within survey bodies and institutions Promote survey related case studies, which demonstrate best practice

10 Get Involved or Contact Us Survey4BIM Group

11 Laser Scanning

12 Measurement Options-Traditional Typically single point acquisition Tape Measure GPS / GNSS Total Station

13 Measurement Options-Mass Data Rapid, multiple point acquisition Laser Scanner GLS-2000 Mobile Mapping IPS-3 Aerial Survey Falcon 8/Sirius Pro

14 Laser Scanning Key Features Selectable Dual Laser Class 1 = Eye safe and invisible Class 3R = 350m+ range

15 Laser Scanning Laser Scanner Sector Applications - Architecture

16 Point Cloud

17 Our process works fine without point clouds

18 Gartner hype cycle for emerging technologies

19 3D Scanning adoption Sources:

20 Where to use Laser Scanning?

21 Construction

22 Buildings Multiple uses

23 Topographic and utility surveys

24 Coastal

25 Heritage

26 Power and Utility Surveys

27 Power and Utility Surveys

28 Plant and M & E

29 Internal Building Surveys

30 Leisure-Golf Courses

31 Collision Investigation

32 Aerospace

33 Survey & Laser Scanning in BIM

34 Client Guide to 3D Scanning and Data Capture First BIM Task Group Technical Guide Cross industry involvement Guide-to-3D-Scanning-and-Data-Capture.pdf 18 March 2014

35 Timeline of 3D Scanning Development 18 March 2014

36 D Scanning Basics

37 Capture Quickly + Accurately

38 Level of Detail Not LOD 50mm point 10m distance

39 Level of Detail Not LOD 25mm point 10m distance

40 Level of Detail Not LOD 12.5mm point 10m distance

41 Level of Detail Not LOD 6.3mm point 10m distance

42 Level of Detail Not LOD 3.1mm point 10m distance

43 Survey Deliverables Point Cloud Options Raw Scan Data Registered Point Cloud Geo-Referenced Point Cloud Vector Options 2D Drawings 3D Wireframe 3D Surface / Solid Model Building Information Model Visualisation Surveyor Information Delivery

44 RIBA Digital Plan Of Work

45 How Site Capture Aligns To dpow Site Context Required Validation Operate, Maintain + Update Site Survey/s Required

46 Minimise Risk Through The Project Lifecycle Value of survey work implemented early in project lifecycle Impact v Cost

47 0 Strategic Definition

48 0 Strategic Definition Is there any existing measured survey? Client Risks Lack of reliable Data on which to make decisions What do I have to start with? Lack of understanding of available data and possible data and their implications Lack of available, reliable professional consultation

49 1-Preparation and Brief Develop project objectives, outcomes, budget, feasibility & brief Client Risks Lack of Survey data What is purpose/accuracy/age of the Survey Data Different co-ordinate systems Misaligned Expectations Lack of a Common Technical Language Over-surveying or Wrongly identified Data Journey Lack of Survey Expertise

50 1-Preparation and Brief PROCESS Mass Data Collection TOOLS Software: Scanmaster WORKFLOW Photography/Mesh/ Pointcloud Point cloud from vehicle mounted mobile laser scan

51 2- Concept Design Outline proposals for structural design, building services, project strategies. Issue final project brief. Client Risks Poor survey specification Level of detail Accuracy Grid Lack of survey budget Poor design definition Lack of or poor Common Data Environment (CDE) & processes

52 It s this easy right?

53 Scan 2 BIM

54 Scan 2 BIM

55 Scan 2 BIM

56 3-Developed Design Coordinated proposals for structural design, building services, project strategies, cost information and project strategies Client Risks Failure to verify survey data available Resources underused due to waiting for required survey data Designers or program delayed due to lack of sufficient survey data Survey data delivered but not shared or used to its potential Hidden design assumptions in relation to survey data reliability - not understood or not identified in risk register contingency

57 3-Developed Design Image courtesy of

58 4-Technical Design Prepare Technical Design for architectural, structural and building services information in accordance with Design Responsibility Matrix and Project Strategies Client Risks Loss of survey control on site Re-surveys = Delays on site, increased cost + risk Uncontrolled site changes = Significant lag since last stages of surveys Lack of data currency

59 4-Technical Design 1. Re-use scan data from previous stages 2. Compare original point clouds to technical design prior to construction 3. Efficient process, reducing duplication of re-survey

60 5-Construction Offsite manufacturing and onsite Construction in accordance with Construction Programme and resolution of Design Queries from site as they arise. Client Risks Rework causes delays and large additional costs Poor survey control Offsite manufactured components don t fit where intended Works destruction of survey control Coordination of survey activities (e.g. Monitoring v As-built) Not recording as-built and planning for hand-back Competence of survey resource Continued collaboration

61 5-Construction

62 5-Construction Laser Scan at project milestones Record point clouds of key components Underground services, core, structural elements, MEP, dry wall etc Compare scanned objects to design model Compare to project program in a quantifiable and auditable way. Monitor site progress & compare against program Identify re-work early Simplify prefabrication Design model migrates to As Constructed? Generates true as built 3D BIM for use by CAFM systems.

63 5-Construction Detect clashes before site work

64 5-Construction Point clouds in setting out process

65 5-Construction Setting Out On Site

66 5-Construction Setting Out On Site

67 6-Handover and Close Out Handover of building and conclusion of Building Contract Client Risks Lack of survey at construction stages or final stage Redline.pdf file is only as built data handed over No budget left for as-built survey As built survey unverified As built survey only to final visible finishes Lack of verification and validation data at close out stage Complete loss of survey control network

68 6-Handover and Close Out As Builts Current Practice Post construction handover drawings and documents Typical Industry current practice Set of 2D pdf files derived from design Set of Operation & Maintenance manuals Measured survey rarely performed

69 6-Handover and Close Out As Builts Future Practice? Generate as built model from multiple stage 5 laser scans Hidden objects recorded and validated Whilst built model compiled in near real time The Information of BIM is retained from design/fabrication model The FM community rejoice

70 7 - In use Undertake In Use services in accordance with Schedule of Services Client Risks No proper as built survey undertaken at end of construction Building services (MEP) not verified in as built survey Provenance of other peoples data Lack of standards, codes & specifications RICS client specification is not a standard Lack of responsibility for who should update model/cde when changes occur

71 7 - In use Minor works and maintenance changes Capture every change, or need XX per area to trigger recapture? Monitor building performance combine laser scan with thermal camera

72 Things to consider if you start using this data

73 Point Cloud Files RDS TXT RCP ASC PTG ZFS 3DD PCD SOI RCS CLR RXP XYZ PN PCG FLS ZFSPROJ RDB VTK PTX POD CL3 LAS BIN RSP

74 Point Cloud Files RDS TXT RCP ASC PTG ZFS 3DD PCD SOI RCS CLR RXP XYZ PN PCG FLS ZFSPROJ RDB VTK PTX POD CL3 LAS BIN RSP

75 Data Storage Massive Files Big data

76 Thank you. Questions?