The INDOT CORS Indiana GIS Conference February 19, 2008
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Transcript of The INDOT CORS Indiana GIS Conference February 19, 2008
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The INDOT CORS Indiana GIS Conference
February 19, 2008
By William A. Schmidt, PE, LS
Manager of Aerial Engineering, INDOTThomas A. Mahon, PE, LS
Survey Group Manager, Woolpert Inc
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What is a CORS?
• Continuously Operating Reference Station
• Operated by Others
• Operates continuously
• Data available for Post-Processing
• Data may be available in real-time
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Advantages of a CORS
• Single coordinate system
• Uniform precision
• No need to setup base stations
• Avoids base station radio issues
• Frees up base stations as rovers
• Increases productivity
• Ease of use
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Existing CORSNGS
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Existing CORS (cont’d)Seiler Instruments (01/15/08)
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INDOT’s Primary Network17 New Stations
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Typical Installation
• Add state map showing INDOT facilities
• Add picture of a maintenance yard
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Primary Monumentation
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Primary Monumentation (Cont’d)
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Primary Monumentation (Cont’d)
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Primary Monumentation (cont’d)
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Secondary Monumentation
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Station Locations
• Primary Station Locations– Indiana Department of
Transportation Facilities– Other State Facilities
• Secondary Station Locations– Other State Facilities– Higher Education (Possibly)– Private Consultants (Unlikely)
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Network Administration
• INDOT Funded Primary Network and it is under construction
• Indiana Office of Technology (IOT) to Maintain Servers
• Servers dedicated to INDOT CORS
• Network Operations and Maintenance by INDOT Aerial Engineering (John Kurtz, LS)
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Budgets
• Initial Capital Costs– Primary Network: $400,000– Secondary Network: $700,000
• Annual Operating Budget: to be determined– Hardware and Software Upgrades– Additional User Licenses (no charge)– Network Administration (IOT fees)
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Schedule
• Procurement Bids – March 2007• Bids Received – April 2007• Bid Awarded – April 2007• Begin Primary Installations – November 2007• Complete Primary Installation, including
operational network – Anticipated Summer of 2008
• Begin Secondary Installation – Anticipated Spring 2008
• Complete Secondary Installation – Projected by the end of 2008
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CORS Access
• Post-Processing– Free & Available from a web location to be
determined
• Real-Time Kinematic– Controlled by user name and password– Up to 300 concurrent users w/o paying for
additional access licenses– May develop a fee-based system of
access to support maintenance, upgrades, and IOT fees
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CORS Access (Cont’d)
• Real-Time Differential– Coast Guard Beacons (10 m h
68%)– WAAS FAA (7 m h&v 95%)– Third Party Vendors Omnistar
(submeter 95%)– INDOT CORS (subdecimeter 95%)– Potential fee schedule similar to
RTK
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CORS Challenge
• Real Time RTK – Vertical– Hundredths vs. Tenths
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CORS Challenge (Cont’d)
• Solution to the Vertical– Height Modernization
• Better Geoid Model Development• Densification of Benchmarks
throughout Indiana• Elevations on existing HARN
Monuments• Elevations on CORS Stations• More Gravity Readings
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INDOT CORS
• Questions?