The Tennessee Base Mapping Program

Office for Information Resources

GIS Services

The Tennessee The Tennessee Base Mapping Base Mapping ProgramProgram

The Tennessee The Tennessee Base Mapping Base Mapping ProgramProgram

“Moving Forward”

Dennis Pedersen, DirectorDennis Pedersen, DirectorOIR – GIS ServicesOIR – GIS Services

Dennis Pedersen, DirectorDennis Pedersen, DirectorOIR – GIS ServicesOIR – GIS Services

OIR – GIS Services 2

Moore County 5/13/08

• Initial Production Complete• Ortho Imagery Pilot

Program• TDOT Partnership• Enterprise GIS – TNMap

TNBMP…Moving ForwardTNBMP…Moving ForwardTNBMP…Moving ForwardTNBMP…Moving Forward



Let’s take a look back…




Pilot Counties – 1997, 1998

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



Milestones/Milestones/AccomplishmentsAccomplishmentsA few quick facts:A few quick facts:

Milestones/Milestones/AccomplishmentsAccomplishmentsA few quick facts:A few quick facts:

• Collaboration/Local partnerships– $5 million in contracts– 250+ organizations in 57 counties– Leveraged existing data in 6 counties– Local GIS maintenance in 45 counties



• State ECB Board – “Wireless Phase II Mapping Minimum 911 Software & Data Requirements” February 1, 2002– Minimum Layers defined:

Street centerlines with complete address attributes Point landmarks – churches, schools, hospitals,

cemeteries, government bldgs. Area landmarks – parks, airports, military bases Fire Hydrants and Stations Water features Administrative boundaries – city, county, state ESN boundaries Digital Ortho photos

TN Base Mapping TN Base Mapping Program/E911:Program/E911:TN Base Mapping TN Base Mapping Program/E911:Program/E911:



Imagery Imagery Update/MaintenanceUpdate/Maintenance

• Initial statewide production complete

• Ortho Imagery is 7 years old in some counties

• Population growth/development driving demand for new imagery

• Need a plan for ortho imagery update/maintenance



Sustainable Ortho Imagery Sustainable Ortho Imagery PrinciplesPrinciples

• Regional or Statewide acquisition– County by county more expensive/inefficient– Eliminate production of overlapping map sheets

• Develop set schedule for updates

• Cost effective approach that meets needs of State and local users

• Leverage federal funding to help reduce or eliminate duplication of effort

• Examine State/local cost share



• Secure Funding to support ortho pilot• Extended current contract to 10/08 and

modified specs to emulate “Imagery for the Nation” and local requirements

• Identify counties with significant growth, imagery that is outdated, TDOT region 1 (upper East TN)

• Continue operating under current cost share model (75% State / 25% local)

Imagery Maintenance Imagery Maintenance StrategiesStrategies



Spec Comparison

Chart

Existing TNBMP Ortho Specs

Pilot TNBMP Ortho Maint. Specs

Photography B/W Panchromatic Film Digital Color

Scale1” = 400’ county wide

1” = 100’ selected urban area

1” = 200’

(400’ Mosaic)

Resolution2’ county wide

6” in selected urban area1’ county wide

Geographic Extent

Entire State9 counties - 2007

13 counties – 2008

DTM Mass Points/BreaklinesMass Points/Breaklines w/ supplemental data

Ortho Maintenance Pilot Ortho Maintenance Pilot ProgramProgram2007-20082007-2008



TNBMP – Digital Terrain ModelTNBMP – Digital Terrain Model



Dept. of TransportationDept. of Transportation

• Need to develop or enhance internal processes for using new technology

• Completed “Gap” analysis to provide detailed recommendations

• Existing analog aerial photography program– Large scale engineering projects (site specific)– Right-of-way corridor studies– Regional planning efforts

• Identified need to update current photogrammetry processes



OIR-GIS/TDOT - PartnershipOIR-GIS/TDOT - Partnership

• TDOT Modernizing Equipment– Digital camera suitable for ortho photo production– Training staff on new photogrammetry production req.– ortho acquisition for ¼ of State annually

• 2008 Acquisition: Region 4 (West TN)

• OIR-GIS responsible for data hosting and distribution– TNMap enterprise GIS– Dissemination to local government



Standards/Funding

CurrentCurrent

TDOT

IFTN

OIR-GIS

Sustainable Tennessee Ortho-Maintenance Program

Aerial Surveys

T N B M P

FutureFuture

Federal

LocalGov

State



Sustainable Ortho Imagery Sustainable Ortho Imagery PrinciplesPrinciples

• Regional or Statewide acquisition– County by county more expensive/inefficient– Eliminate production of overlapping map sheets

• Develop set schedule for updates– 4 year cycle

• Cost effective approach that meets needs of State and local users

• Leverage federal funding to help reduce or eliminate duplication of effort

• Revisit State/local cost share



• State will provide local government with updated ortho imagery – 4 year cycle

• Local gov. will provide the State with updated parcels, street centerline GIS data

• Counties with new imagery (2007 or 2008):– Local cost share is 25% of parcels only




• Vision: Maintain a statewide GIS base map through partnership development that can be used in support of a wide range of local, state, and federal programs

TNBMP…Moving Forward TNBMP…Moving Forward TNBMP…Moving Forward TNBMP…Moving Forward



http://tnmap.state.tn.us/portal

http://gis.state.tn.us

http://tnmap.state.tn.us/portal

http://gis.state.tn.us

TNBMP…Moving Forward TNBMP…Moving Forward TNBMP…Moving Forward TNBMP…Moving Forward

The Tennessee Base Mapping Program

Documents

Transcript of The Tennessee Base Mapping Program