Timothy Beach BScMulti-Limn

tmb@land-info.co.uk

How a 2-person surveying firm takes advantage of HDS on a daily basis - in rainy England, no less!

2009 Leica Geosystems HDS Worldwide User Conference

How many surveyors does it take to press

‘scan’?

Who Are We?

Multi - Limn

www.land-info.co.uk

2/3 Person Land Survey Company based in South East England

Formed in 1991 by Margaret Beach BSc

MRICS

Who Are We?

Services

www.land-info.co.uk

Broad spectrum of Engineering SurveyMeasured Building SurveysGIS Data CaptureBoundary Matters

HDS Experience HDS since January

2003 Cyrax 2500 Leica HDS3000 ScanStation 2

Why a scanner? Versatility Cuts down on staff Efficient QA

www.land-info.co.uk

Phases of UseDevelopmental(2003 – 2004)

Early projects

Early ‘Mobile’ Mapping – 15 London Road Junctions in a day

GIS data collection in Cemeteries

Glass Ceilings in Gymnasiums

www.land-info.co.uk

Phases of Use‘In House Tool’(2004 – 2006)

HDS + (GPS +TPS) = Complete picture

Developing uses Road Markings Elevations

QA Benefits Independently controlled

scan data used to verify site information

www.land-info.co.uk

Phases of UseAdded External Services

(2006 – 2008) Provision of HDS Services

Other Survey Companies Consulting Engineers

Deliverables Point Cloud Data Completed Drawings

www.land-info.co.uk

Why Scan Everything?

The Angel of the North is a contemporary sculpture designed by Antony Gormley

Near Newcastle Upon Tyne Stands 66 feet (20 m) tall, with

wings measuring 178 feet (54 m) across

Scanned in 2 hours HDS3000 Fully controlled & Geo-referenced

Why?

www.land-info.co.uk

Why Scan Everything?

Have the equipment available If it’s there then we

might as well use it! Extra Detail Captured

Doesn’t just focus on item of interest

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Extra detail not always appreciated!

“Just because something doesn't do what you planned it to do doesn't mean it's useless.” Thomas A. Edison

US inventor (1847 – 1931)

Why Scan Everything? 360° Scans

Aid Registration Puts item in context Extra detail may be required further down the line Visual Record/ Snap Shot in Time

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1 Person Methodology – Field

Set up HDS @ Position 1 Set resolution to

appropriate estimated scan time

~ 30-50 minutes scan = 1 hour set ups

Place HDS Targets in appropriate locations

RTK GPS Control Stations Soft detail

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1 Person Methodology – Field

Set up TPS – using coordinates from GPS Survey HDS Target

Positions

Fix Control Detaili.e. Walls, Buildings

Fix any other key detail until scan complete

Acquire targets, and move HDS to next position.

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1 Person Methodology – Office

Process TPS/GPS Generates 2D and 3D Line

work Register Scan Data in Cyclone

Import Target Coordinates and Register

Auto-Add Cloud Constraints

Virtual Surveyor Unify Data Export ASCII Data Import into Survey

Package/CAD

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1 Person Methodology – QA/QC

Check Data in Cyclone Slices through buildings

etc to ensure corners line up correctly

Colour Code each scan separately – ensure no miss-alignments

Pointools Import PTZ and 3D Line

drawings Visual checks

www.land-info.co.uk

“Put It In The Pot & See What Comes Out!”

HDS

Download and Combine in LGO/LSS

Register And Geo-reference

in Cyclone

QA/QC

Target Coordinates

Virtual Surveyor

LSS

CADFinal Deliverables

Overall Business Metrics for Multi-Limn

50%

30%

5% 5%10%

Business Sectors

TopographicBuilding SurveysBoundaryGISSetting Out

HDS Metrics: Field Use

Percentage of Projects on which HDS is Utilised

Topographic Surveys

Building Surveys(Measured Building Surveys + Elevations)

Boundary Surveys

GIS

Setting Out

80% of jobs

100% of jobs

80% of jobs

30% of jobs

None (as yet!)www.land-info.co.uk

HDS Metrics: Office Use

Topographic surveys

Building surveys

Boundary Surveys

GIS

Setting Out

10-70% of data from HDS

90% of data from HDS (via CloudWorx)

40% of data from HDS

10% of data from HDS

None (as yet!)

www.land-info.co.uk

Percentage of Final Deliverable Generated from HDS

Phases of UseFull Circle

(2008 - ) Benefits

Capturing complete data Reduced site visits Historical Record QA

www.land-info.co.uk

Previously undertaken HDS Projects return: Extra detail required Scope of Project Changes

Project ExamplesArchaeological Record Drawings

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Project ExamplesCamera Placement for Lines of Sight

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Project ExamplesHolding Down Bolt Position Checks

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www.laserscanning.org.uk/forum

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Oh, and how many Surveyors does it take?One.....just about!

www.land-info.co.uk

T H A N K YO U FO R YO U R T I M E !

Q U E ST I O N S ?

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