Timothy Beach BScMulti-Limn
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
www.land-info.co.uk
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
www.land-info.co.uk
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
www.land-info.co.uk
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.
www.land-info.co.uk
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
www.land-info.co.uk
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
www.land-info.co.uk
Project ExamplesCamera Placement for Lines of Sight
www.land-info.co.uk
Project ExamplesHolding Down Bolt Position Checks
www.land-info.co.uk
www.laserscanning.org.uk/forum
www.land-info.co.uk
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 ?
www.land-info.co.uk
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