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This dataset is the result of a cooperative agreement between the State of South Dakota Department of Transportation - Office of Transportation Inventory Management and the Local Planning Districts/Organizations of South Dakota. The data was collected using GPS technology. The data was differentially corrected and converted into ESRI's Arcinfo coverages using macros developed by GeoResearch Inc. (now Micheal Baker & Assoc.). Throughout the years the county Arcinfo coverages have been converted to Personal Geodatabases and now have been combined into one dataset (NSTRI) as an SDE layer. |