Boston & Providence

803 Summer Street 803 Summer Street -- First Floor First Floor •• Boston, MA 02127 Boston, MA 02127 T: 617T: 617--275275--0541 0541 •• extext 14051405

76 Dorrance Street 76 Dorrance Street –– Suite 210 Suite 210 •• Providence, RI 02903Providence, RI 02903TT : 401: 401--421421--0541 0541 •• extext 14051405

[email protected]@dgtsurvey.com -- www.dgtsurvey.comwww.dgtsurvey.com

Boston & Providence

Digital Geographic Technologies Inc.Digital Geographic Technologies Inc.presents:presents:

Advanced 3 Dimensional Laser Scanning TechnologyAdvanced 3 Dimensional Laser Scanning Technology““High Definition SurveyingHigh Definition Surveying””

Copyright © 2009 Digital Geographic Technologies, Inc. All Rights Reserved

What is 3D Laser Scanning?What is 3D Laser Scanning?

A process of capturing object shapes into a virtual workspace by thousands of grid points at selectable density by means of laser beam.

The scanning result is a spatial cloud of points that can be treated and visualized from different perspectives simultaneously on the computer screen.

Adjacent point clouds can be merged and transformed into a defined coordinate system.


Capturing/Mapping Object ShapesCapturing/Mapping Object Shapes


How does 3D Laser Scanning work?How does 3D Laser Scanning work?Vector Sensing TechniqueVector Sensing Technique

1.1. The laser is fired and hits a surfaceThe laser is fired and hits a surface

2.2. Some of the laser light is reflected back towards the scannerSome of the laser light is reflected back towards the scanner

3.3. The scanner detects the return pulseThe scanner detects the return pulse

4.4. The timing electronics determines the amount of time taken The timing electronics determines the amount of time taken by the laser pulse to exit from and return to the systemby the laser pulse to exit from and return to the system

5.5. When combined, the angle of the mirrors and distance to the When combined, the angle of the mirrors and distance to the surface sampled can be converted to a single Cartesian surface sampled can be converted to a single Cartesian (X,Y,Z) point coordinate including intensity value(color and (X,Y,Z) point coordinate including intensity value(color and texture of the object)texture of the object)


CYRAX 2500CYRAX 2500ClassClass--II (eyeII (eye--safe) safe) –– Green Laser Green Laser

BeamBeam

Field of view:Field of view: 40 x 4040 x 40

Acquisition Rate: Acquisition Rate: 1000 pnts/sec1000 pnts/sec

Max. Range: Max. Range: 100m100m

Single point accuracy: Single point accuracy: +/+/-- 6mm @ 50m6mm @ 50m


RIEGL LMS 360iRIEGL LMS 360iClassClass--I Laser Beam (eyeI Laser Beam (eye--safe)safe)(invisible by eye (invisible by eye –– traffic safe)traffic safe)

Field of view:Field of view: 90 x 36090 x 360

Acquisition Rate: Acquisition Rate: 8000 pnts/sec8000 pnts/sec

Max. Range:Max. Range: 200m200m

Single point accuracy: Single point accuracy: +/+/-- 6mm @ 100m6mm @ 100m


Point CloudPoint CloudRiegl LMS 360i ScannerRiegl LMS 360i Scanner

360 degree view 360 degree view -- HorizontalHorizontal

True Color Applied from CameraTrue Color Applied from Camera


Point CloudPoint CloudRiegl LMS 360i ScannerRiegl LMS 360i Scanner

360 degree view 360 degree view -- VerticalVertical

True Color Applied from CameraTrue Color Applied from Camera


3D Laser Scanning Applications 3D Laser Scanning Applications

Verification of Construction

Creating virtual models of existing structures for adaptation planning.

Existing Conditions Mapping

Unbiased Documentation for Claims and Changes and Litigation Support

Construction Progress Monitoring

Clash Detection and Avoidance


STATA Center STATA Center -- M.I.T.M.I.T.Monitoring construction progressMonitoring construction progress


STATA Center STATA Center -- M.I.T.M.I.T.True Color SuperimposedTrue Color Superimposed


Inaccessibility and Complex Geometry Easily ManagedInaccessibility and Complex Geometry Easily ManagedSTATA Center STATA Center -- M.I.T.M.I.T.


Benefits of 3D Laser ScanningBenefits of 3D Laser ScanningCaptures thousands of points per second up to 360 deg coverageRemote location of objects:

Inaccessible or dangerous locations– Highways and Traffic intersections– High Voltage Utilities– Structural Steel– Tall structures

Detailed Point Cloud dataThat can be viewed in 3DThat can be dimensioned and modeledThat can be exported to other software platforms.

Rapid and comprehensive 3 dimensional mapping of existing facilities.


Point Cloud Data Point Cloud Data w/ True Color superimposedw/ True Color superimposed


Point Cloud Data Point Cloud Data w/ Intensity Colorw/ Intensity Color


Point Cloud Data Point Cloud Data After CleaningAfter Cleaning


Point Cloud Data Point Cloud Data w/ Selected Work Areaw/ Selected Work Area


ModelingModeling


MeasurementsMeasurements


3D Lines and Mesh 3D Lines and Mesh –– for CAD Exportfor CAD Export

Triangulation MeshTriangulation Mesh


3D Lines, Mesh & Contours 3D Lines, Mesh & Contours –– for CAD Exportfor CAD Export


Export to AutoCADExport to AutoCADPoint CloudPoint Cloud

AsAs--built Survey built Survey –– Atlantic Avenue, BostonAtlantic Avenue, BostonExhaust Stacks ~ 240Exhaust Stacks ~ 240’’ High from GroundHigh from Ground


Existing Conditions SurveyExisting Conditions SurveyBoston College High SchoolBoston College High School


Construction Grid LinesConstruction Grid LinesCoordinated w/ Point CloudCoordinated w/ Point Cloud


Existing Conditions SurveyExisting Conditions Survey

Boston College High SchoolCopyright © 2009 Digital Geographic Technologies, Inc. All Rights Reserved

Typical Conventional Survey NoteTypical Conventional Survey Note


Accident Scene SurveyAccident Scene SurveyExisting Wires Existing Wires –– Measurement to GroundMeasurement to Ground


Accident Scene SurveyAccident Scene SurveyExisting Wires Existing Wires –– Measurement to RoofMeasurement to Roof


Accident Scene SurveyAccident Scene SurveyExisting Wires Existing Wires –– Plan ViewPlan View


Accident Scene SurveyAccident Scene SurveyTheoretical Wire Theoretical Wire –– Measurement to GroundMeasurement to Ground


Accident Scene SurveyAccident Scene SurveyTheoretical Wire Theoretical Wire –– Plan ViewPlan View


Point Cloud on Project Grid LinesPoint Cloud on Project Grid Lines

Harvard University Harvard University -- BRI ProjectBRI Project


Point Cloud on Project Grid LinesPoint Cloud on Project Grid Lines


Point CloudPoint CloudInside Construction ZoneInside Construction Zone

Harvard University Harvard University -- BRI ProjectBRI ProjectCopyright © 2009 Digital Geographic Technologies, Inc. All Rights Reserved

Slurry Wall AsSlurry Wall As--builtbuiltPoint CloudPoint Cloud


Slurry Wall AsSlurry Wall As--builtbuiltRendered Triangulation MeshRendered Triangulation Mesh

ProtrusionProtrusion

CavityCavity

Harvard University Harvard University -- BRI ProjectBRI ProjectCopyright © 2009 Digital Geographic Technologies, Inc. All Rights Reserved

Slurry Wall AsSlurry Wall As--built built Point CloudPoint Cloud


Slurry Wall AsSlurry Wall As--built built Rendered Triangulation MeshRendered Triangulation Mesh


Slurry Wall AsSlurry Wall As--built built Protrusion from Theoretical PlaneProtrusion from Theoretical Plane


Slurry Wall AsSlurry Wall As--built built Cavity from Theoretical PlaneCavity from Theoretical Plane


Slurry Wall Surface ContourSlurry Wall Surface ContourProtrusion vs. CavityProtrusion vs. Cavity

Side ViewCopyright © 2009 Digital Geographic Technologies, Inc. All Rights Reserved

Slurry Wall Surface ContourSlurry Wall Surface ContourProtrusion vs. CavityProtrusion vs. Cavity

Plan ViewCopyright © 2009 Digital Geographic Technologies, Inc. All Rights Reserved

Thompson Island RestorationThompson Island Restoration3D Point Cloud3D Point Cloud


Thompson Island RestorationThompson Island RestorationTopographic Survey Topographic Survey –– 2D CAD Drawing2D CAD Drawing


The Granite BuildingThe Granite BuildingExisting Conditions SurveyExisting Conditions Survey








803 Summer Street 803 Summer Street -- First Floor First Floor •• Boston, MA 02127 Boston, MA 02127 T: 617T: 617--275275--0541 0541 •• extext 14051405

76 Dorrance Street 76 Dorrance Street –– Suite 210 Suite 210 •• Providence, RI 02903Providence, RI 02903TT : 401: 401--421421--0541 0541 •• extext 14051405

[email protected]@dgtsurvey.com -- www.dgtsurvey.comwww.dgtsurvey.com

Boston & Providence

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Boston & Providence