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The INDOT CORS 2007 Indiana GIS ConferenceMarch 13, 2007By
William A. Schmidt, PE, LSManager of Aerial Engineering,
INDOTThomas A. Mahon, PE, LSSurvey Group Manager, Woolpert Inc
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What is a CORS?Continuously Operating Reference StationOperated
by Others Operates continuouslyData available for
Post-ProcessingData may be available in real-time
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Advantages of a CORSSingle coordinate systemUniform precisionNo
need to setup base stationsAvoids base station radio issuesFrees up
base stations as roversIncreases productivityEase of use
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Existing CORSNGS
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Existing CORS (contd)Seiler Instruments
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INDOTs Primary Network17 New Stations plus Bloomington
(IUCO)
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Typical Installation
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Initial Installations
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Primary Monumentation
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Primary Monumentation (Contd)
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Primary Monumentation (Contd)
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Secondary Monumentation
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Station SponsorsPrimary StationsIndiana Department of
TransportationSecondary StationsOther State
AgenciesMunicipalities/Counties (Possibly)Higher Education
(Possibly)Private Contractors (Not at this time)
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Network AdministrationINDOT to Fund Primary NetworkIndiana
Office of Technology (IOT) to Maintain ServersServers dedicated to
INDOT CORS
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BudgetsInitial Capital CostsPrimary Network: $400,000Secondary
Network: $800,000
Annual Operating Budget: to be determinedHardware and Software
UpgradesAdditional User LicensesNetwork Administration
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ScheduleProcurement Bids March 2007Bids Received April 2007Bid
Awarded April 2007Begin Primary Installations May 2007Complete
Primary Installation, including operational network December
2007Begin Secondary Installation August 2007Complete Secondary
Installation - TBD
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CORS AccessPost-ProcessingFree & Available thru www,
location to be determinedReal-Time KinematicControlled by user name
and passwordUp to 250 concurrent users w/o paying for additional
access licensesMay develop a fee-based system of access to support
maintenance and upgrades
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CORS Access (Contd)Real-Time DifferentialCoast 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 Access (Contd)
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CORS Access (Contd)
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INDOT CORSQuestions?
