Office for Information Resources GIS Services Tennessee Base Mapping Program Dennis T. Pedersen,...

Office for Information Resources

GIS Services

Tennessee Base Tennessee Base Mapping Mapping ProgramProgram

Tennessee Base Tennessee Base Mapping Mapping ProgramProgram

Dennis T. Pedersen,Department of Finance and Administration

Office for Information ResourcesDirector, GIS Services

OIR – GIS Services Gibson CountyJuly 2007

TN Base Mapping TN Base Mapping ProgramProgram

TN Base Mapping TN Base Mapping ProgramProgram

•Overview•Status•Activities•Next steps


TN Base Mapping TN Base Mapping Program – Program – Basic Products:Basic Products:

TN Base Mapping TN Base Mapping Program – Program – Basic Products:Basic Products:

• Ortho Imagery• Cadastral (Parcel)• Limited Planimetric Data

Street CenterlinesEdge of PavementsRidge LinesHydrography

• Scales are 1”=100’ and 1”=400’• Format is ESRI compatible


TN Base Mapping TN Base Mapping Program – Program – Value Added Products:Value Added Products:

TN Base Mapping TN Base Mapping Program – Program – Value Added Products:Value Added Products:

• High Accuracy DTMs

• Contours• Building Footprints


TN Base Mapping TN Base Mapping Program – Program – Scope:Scope:

• Continuous coverage for the entire state

• Over 24,000 100’ sheets• Over 11,000 400’ sheets• Over 3.6 million parcels


1996/1997 – 2 county Pilot Program conducted by the Comptroller of the Treasury

Maintain Parcel maps for 80 of 95 counties

Maintain Assessment Database for 90 of 95 counties

1998 – Pilot Program extended to 3 additional counties

Program coordination transferred to Office for Information Resources

TN Base Mapping TN Base Mapping Program – Program – History:History:


Pilot Counties – 1997, 1998

TN Base Mapping TN Base Mapping ProgramProgramTN Base Mapping TN Base Mapping ProgramProgram


• Funding Model:Benefits of collaborationCost Share between State, County,

Municipal, and Federal governmentsLocal Shares – 25% per countyState – 75% (the rest!)

TN Base Mapping TN Base Mapping Program – Program – Collaboration:Collaboration:TN Base Mapping TN Base Mapping Program – Program – Collaboration:Collaboration:


• Reduced costs for collection, update, and maintenanceReducing redundancy of collection

• Higher accuracy data for all users• Increased ability to integrate data at

all levels of governmentHorizontal Integration: NRCS and FEMAVertical Integration: Local gov’t / Census

TN Base Mapping Program TN Base Mapping Program – – Collaboration:Collaboration:TN Base Mapping Program TN Base Mapping Program – – Collaboration:Collaboration:


TN Base Mapping Program TN Base Mapping Program –– Collaboration: Collaboration:TN Base Mapping Program TN Base Mapping Program –– Collaboration: Collaboration:

Anderson County

Total Cost: $473,500

Local Share:$118,400

Local Share: $118,400County: $ 38,700E911 Board $ 21,400City of Oak Ridge: $ 12,500Oak Ridge Utility Dist: $ 12,500Powell Clinch Utility Dist: $ 26,100City of Clinton $ 4,700City of Norris $ 600City of Oliver Springs $ 1,000City of Lake City $ 800


TN Base Mapping TN Base Mapping Program – Program – Status:Status:TN Base Mapping TN Base Mapping Program – Program – Status:Status:


Gibson County:Total cost: $246,800

$ 81,800 - 100’ Ortho Imagery $ 78,800 - 400’ Ortho Imagery $ 105,300 - Parcel Data

Local Cost Share:$66,500

(Basic Products)

TN Base Mapping Program TN Base Mapping Program -- Next Steps: Next Steps:TN Base Mapping Program TN Base Mapping Program -- Next Steps: Next Steps:


Manage County ResourceProperty Tax is primary

revenue source for budget visually inspect property over/under valued identify patterns/trends in data determine influences on variations in data*Increase accuracy and Manage

Resources

TN Base Mapping Program TN Base Mapping Program –– Return on Investment: Return on Investment:TN Base Mapping Program TN Base Mapping Program –– Return on Investment: Return on Investment:

Office for Information Resources

GIS Services

County By Market Area


Parcels Labeled with Appraised Values


Parcel with Trees Overlay


Economic DevelopmentSite Selection criteria:

proximity to transportation

size of parcels

assess elevation, slope, drainage

*Saves Money:

Rutherford Co.



Emergency ManagementE911 needs to locate

incidents and dispatch first respondersMisrouted cell and VOIP calls

Need statewide standardized street centerlines – NG911

*Using GIS can improve response time and ultimately

help save lives



Save Money


Save Time

Increase Accuracy

Improve Access

Manage Resources


Gibson County:Local Cost Share: $66,500

$ 81,800 - 100’ Ortho Imagery $ 78,800 - 400’ Ortho Imagery $ 105,300 - Parcel DataRevised Local Cost

Share: $26,325 (parcel costs)

TN Base Mapping Program TN Base Mapping Program -- Next Steps: Next Steps:TN Base Mapping Program TN Base Mapping Program -- Next Steps: Next Steps:


Thank You!!Thank You!!

• Contact Information:– Dennis Pedersen, Director, GIS

Services312 8th Avenue North16th Floor, WRS Tennessee TowerNashville, TN 37243-0288

– E-mail: [email protected]– Phone: 615-741-9356

See us on the WEB too:

http://gis.state.tn.us

See us on the WEB too:

http://gis.state.tn.us

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