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Back to SAG Winners 2002
State of Tennessee
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The Tennessee Base Mapping Program (BMP) is an innovative state and local government partnership to create a consistent statewide base map composed of orthoimagery, parcels, DTMs, and limited planimetric features at 1:4800 and 1:1200 scales.
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Business Problem The Tennessee GIS Base Mapping Program provides the base map for the Geographic Information System, using the smallest possible geographical unit - the parcel map - as its foundation.
The program will result in a GIS database built upon aerial photographs; orthophotographs, (aerial photographs, digitally rectified for scale variations and image displacement resulting from relief or terrain variations and camera tilt); planimetric data (layers of data concerning the features of the Earth's surface) to encompass ridgeline and hydrographic features and parcel data (data representing the geographic limits of real property).
The State has developed a detailed business plan that calls for 25% fiscal participation from local sources on a county-by county basis. The State will provide 75% of the total county costs as well as take responsibility for all aspects of the production effort.
The Tennessee GIS Statewide Base Mapping Program is the first step in creating the most comprehensive and accurate Geographic Information System ever implemented on a statewide scale, bringing dramatic efficiencies to government in service to the State's citizens. The program is the basis and foundation upon which the State of Tennessee Spatial Data Architecture will be built. (http://gis.state.tn.us/projects/sda/) Technology Implemented The technical specifications for the Tennessee Base Mapping Program were developed during a pilot program spanning 1996 to 1998. A significant development effort is underway between the State of Tennessee and ESRI to transition from a coverage-based, Librarian data structure to a geodatabase model using ArcSDE. Tennessee's Spatial Data Architecture provides the foundation for enterprise development of spatial technologies, including strategic planning, data maintenance, application development, shared hardware/software infrastructure, and data distribution services across state government. Data products from the Base Mapping Program will be managed and served using a spatial warehouse, with distributed warehouses as required for specific resources. Development Team Biography The development team for the Tennessee Base Mapping Program (BMP) represents a unique partnership between the Division of Property Assessments (DPA), Comptroller of the Treasury and Office for Information Resources (OIR), Division of Finance and Administration. Staff assigned:
Joe Sewash, GIS Analyst, OIR - system administration, plan/ortho verification & technical consulting
David Tirpak, GIS Analyst, DPA - parcel verification and technical consulting
Dennis Pedersen, GIS Manager, DPA - management and coordination of parcel components of the project
Roger Lowe, Mapping Supervisor, DPA - manual mapping section and all source documents
Mark Tuttle, Director of GIS Services, OIR - project manager
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