Office for Information Resources GIS Services Flood Map Modernization and the Tennessee Base Mapping Program Dennis Pedersen, Director F&A, OIR – GIS Services.

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Presentation transcript:

Office for Information Resources GIS Services Flood Map Modernization and the Tennessee Base Mapping Program Dennis Pedersen, Director F&A, OIR – GIS Services

OIR – GIS Services 2 Tennessee Base Mapping Program What is the DFIRM Product? Components of DFIRM Product Tennessee Base Map Source Data Tennessee Base Map Topography Source Data GIS Data Sources Benefits of DFIRM Product Demonstration Presentation Overview

OIR – GIS Services 3 Tennessee Base Mapping Program What is the DFIRM Product? Official basis for implementing the regulations and requirements of the National Flood Insurance Program (NFIP) A digital database that encompasses several features or layers of spatial information DFIRM database includes: –Flood hazards areas 1% annual chance flood (100-year flood), known as the base flood Areas of 0.2% annual chance flood

OIR – GIS Services 4 Tennessee Base Mapping Program What is the DFIRM Product? (cont.) –Base (1% annual chance) Flood Elevation (BFE) lines with mapped cross section lines –Structures (dams, bridges, culverts, levees etc.) –Hydrographic features (streams, lakes, shorelines) –Transportation features with labels –Political areas (corporate and county boundaries, National Parks, forests, and military lands)

OIR – GIS Services 5 Tennessee Base Mapping Program What is the DFIRM Product? (cont.) –Permanent benchmarks with National Geodetic Survey (NGS) Permanent Identifier –FIRM panel areas with effective date, size, scale, and corner coordinates –USGS 7.5-minute quadrangle areas –Required to meet FEMA standards and specifications Subject to community review and approval

OIR – GIS Services 6 Tennessee Base Mapping Program Components of DFIRM DFIRM = Flood Data Base + Topography +

OIR – GIS Services 7 Tennessee Base Mapping Program Vision Statement: Create a statewide GIS base map through partnership development that can be used in support of a wide range of local, state, and federal programs Base Mapping Program

OIR – GIS Services 8 Tennessee Base Mapping Program

OIR – GIS Services 9 Tennessee Base Mapping Program Tennessee Base Map Source Data Parcels and related features –Parcel boundaries –Parcel annotations –Other cadastral features Planimetrics -Edge-of-pavement (EOP) -Hydrology - Streams - Lakes, rivers, and shorelines

OIR – GIS Services 10 Tennessee Base Mapping Program Tennessee Base Map Source Data (cont.) Street centerlines Administrative boundaries –County and city

OIR – GIS Services 11 Tennessee Base Mapping Program Tennessee Base Map Topography Source Data Two different DTM products: standard and high accuracy (HA) Standard DTM vs. High Accuracy DTM –Standard produces the orthophoto –HA produce 10’ contours for 400’ scale and 2’ contours for 100’ scale FEMA subcontractors use DTMs to produce contours Modify DFIRM for more accurate depiction of floodway boundaries

OIR – GIS Services 12 Tennessee Base Mapping Program TNBMP – Digital Terrain Model

OIR – GIS Services 13 Tennessee Base Mapping Program

OIR – GIS Services 14 Tennessee Base Mapping Program

OIR – GIS Services 15 Tennessee Base Mapping Program

OIR – GIS Services 16 Tennessee Base Mapping Program

OIR – GIS Services 17 Tennessee Base Mapping Program Other DFIRM Data Sources Local Government –Utilities –Planning –Engineering –GIS departments Tennessee Department of Transportation Tennessee Valley Authority (TVA) & Corps of Engineers –Flood Studies –Contours –Anecdotal Information –Structure Elevations

OIR – GIS Services 18 Tennessee Base Mapping Program Benefits of DFIRM Product Increase quality, reliability, and availability of flood data and flood hazard maps Provide timely flood hazard information Enhance ability to manage risks and issues locally Provides a comprehensive approach to economic development, mitigation planning, and emergency response

OIR – GIS Services 19 Tennessee Base Mapping Program Benefits of DFIRM Product (cont.) Provide detailed information for builders and developers for making decisions Flood risks and Flood hazards are demonstrated more efficiently for local officials and community planners Provide insurance agents, companies, and lending institutions updated flood map information resulting in fair and equitable insurance rates

OIR – GIS Services 20 Tennessee Base Mapping Program How can State agencies create and maintain spatial data once and use (share) it many times? The “Tennessee Map” (TNMap) Enterprise GIS Development

OIR – GIS Services 21 Tennessee Base Mapping Program Goals –Develop enterprise GIS infrastructure to provide secure, usable, and easy access to TNBMP data –Provide State agencies with ability to publish data to enterprise GIS –Support vision of USGS’ National Map and NSDI –Identify data stewards, reduce or eliminate redundant GIS data collection The Tennessee Map (TNMap): Enterprise GIS Architecture

OIR – GIS Services 22 Tennessee Base Mapping Program Geo-portal application Base Map Data Repository Shared GIS infrastructure for application hosting Access: Public, State GIS users TNMap…More than just a map The Tennessee Map (TNMap): Enterprise GIS Architecture TNMap portal demonstration…

OIR – GIS Services 23 Tennessee Base Mapping Program GIS Data Workflow Custom GIS Data = GIS Analysis Base Map Data + Tabular +

OIR – GIS Services 24 Tennessee Base Mapping Program State GIS Data Hazmat / Schools / Hospital locations Environmental / Conservation features City / County / Admin. Boundaries (OIR GIS) Streets / Rivers / Land Features (OIR GIS) Property Boundaries (OIR GIS) Imagery / Elevation (OIR GIS)

OIR – GIS Services 25 Tennessee Base Mapping Program

OIR – GIS Services 26 Tennessee Base Mapping Program

OIR – GIS Services 27 Tennessee Base Mapping Program

OIR – GIS Services 28 Tennessee Base Mapping Program

OIR – GIS Services 29 Tennessee Base Mapping Program

OIR – GIS Services 30 Tennessee Base Mapping Program OIR-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

OIR – GIS Services 31 Tennessee Base Mapping Program

OIR – GIS Services 32 Tennessee Base Mapping Program –FEMA Map Service Center: –FEMA Mapping Information Platform: –Administrative Questions: Stan Harrison, Reg. Director, ECD Local Planning FEMA Flood Map Modernization: On-line and other Resources

OIR – GIS Services 33 Tennessee Base Mapping Program Thank you…. Contact Information: –Dennis Pedersen, Director, GIS Services th Avenue North 16 th Floor, WRS Tennessee Tower Nashville, TN – –Phone: