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NSW
www.corsnet.com.au
State infrastructure for GNSS applications… CORS of course! Volker Janssen
Survey Infrastructure and Geodesy, LPI
2 GNSS Futures Workshop, UNSW, Sydney, Australia, 7-8 July 2014
Outline • Evolving survey infrastructure.
• CORSnet-NSW.
• SCIMS vs. CORS.
• Next-generation datum.
• Why use CORS?
• Internal GNSS applications.
• External GNSS applications.
• Supporting the profession.
• Conclusions.
3 GNSS Futures Workshop, UNSW, Sydney, Australia, 7-8 July 2014
From TRIGS To CORS
Continuously Operating Reference Stations
Evolving Survey Infrastructure Passive Survey Control Active Survey Control
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CORS in NSW
SydNET
• 1992: LPI’s first CORS
installed in Bathurst.
• 2004: 7 CORS operating
in greater Sydney area
SydNET.
• 2009: Expansion to provide
state-wide coverage
CORSnet-NSW.
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CORSnet-NSW (Nov 2009)
27 stns in operation
+ 3 national CORS
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CORSnet-NSW (June 2014)
150 stns in operation
160 stns by late 2014
RTK: 67% area, 99.8% population
NRTK: 54% area, 98.4% population
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CAAM • CORSnet-NSW Adjustable Antenna Mount (CAAM):
Legally traceable
survey monument.
Antenna oriented to TN.
Zero antenna height.
Australian
Patent
issued.
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CORSnet-NSW: Monitoring
• Stability monitoring of all CORSnet-NSW sites:
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SCIMS vs. CORS
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SCIMS vs. CORS SCIMS… GDA94(1997)
• Original realisation of GDA94, adjusted in 1997.
• Based on local connections to surrounding control
Indirect connection to AFN.
Distortions, i.e. unsuitable for CORS network.
• CORSnet-NSW coords via local tie survey (SCIMS).
CORS… GDA94(2010)
• Ad-hoc realisation of GDA94, introduced in 2010.
• Based exclusively on GNSS observations
Direct connection to AFN, virtually distortion-free.
• CORSnet-NSW coords via Reg 13 (website).
Site Transformation!
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Local Tie Surveys Initial Goal:
• Current datum improvement.
– GDA94(1997) coords of CORS.
– AHD71 value of CORS.
– Upgrade UU components to D4
for existing control.
Ultimate Goal:
• Next-generation datum improvement.
– Readjustment of GDA94(1997)
based on CORS GDA2020.
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Preparation for the New Datum
Tie surveys to link
CORS & ground marks.
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Why a New Datum?
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Why use CORS? • Infrastructure maintained externally.
• Direct connection to datum.
• Legal traceability.
• Accuracy.
• Reliability.
• Ease of operation.
• Speed.
• Productivity.
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Why use CORS? • Improved productivity in surveying & land management:
20-40% in 2012 further 20% by 2020.
• $ billions of income & savings:
Allan Consulting (2008) Economic benefits of high resolution positioning service.
Allan Consulting (2013) Precise positioning services in the surveying and land management sector.
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Internal GNSS
Applications
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State Survey Control
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DCDB Upgrade
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Ground Control for LiDAR & Imagery
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External GNSS Applications
External GNSS
Applications
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• Land surveying, construction & mining.
• Machine control & precision agriculture.
• Remote sensing & photogrammetry.
• Asset inventory & management.
• Fleet management.
• Emergency response.
External GNSS Applications
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• Deformation monitoring.
• Atmospheric monitoring.
• Sea level & climate change.
• Animal tracking.
• Navigation.
• Research.
External GNSS Applications
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Volcano Deformation Monitoring
Mount Papandayan
in Indonesia…
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Rift Mechanics & Glacial Motion
Amery Ice Shelf in
Antarctica…
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GNSS-Based Animal Tracking
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Intelligent Transport Systems (ITS)
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Supporting the
Profession
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AUSPOS
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National Positioning Infrastructure (NPI)
• Provide reliable, compatible & interoperable positioning
infrastructure to deliver access to fit-for-purpose PNT info
in a multi-GNSS enabled information economy.
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Next-Generation Datum Meckering, WA
Oct 1968 GDA94
GNSS Vectors < 3,000
Current
More GNSS
Higher Precision 90,000 +
Coord Accuracy
250 mm (95% CI)
Coord Accuracy
20 mm (95% CI)
Tie surveys… 6h+ AUSPOS…
More data…
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GNSS Validation Networks
Bass Hill
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Regulations, Directions, Guidelines
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• Positioning infrastructure & CORS.
• GNSS & CORS applications.
• RTK, NRTK, PPP, Virtual RINEX.
• Datums & transformations.
• Heighting & AUSGeoid09.
• EDM baseline infrastructure.
• Airborne LiDAR.
• Best practice.
• GeodesyML.
• SCIMS3.
Research & Publications
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• CORS infrastructure crucial for modern positioning.
• State jurisdictions provide essential link betw. federal
initiatives & academia and the profession.
– Infrastructure maintenance.
– Applied research.
– Legislation.
– Guidance.
Conclusions
35 GNSS Futures Workshop, UNSW, Sydney, Australia, 7-8 July 2014
Questions...?
CORSnet-NSW
rocks !!!
http://www.corsnet.com.au
