Entire state

Locational accuracy for features derived from USGS 7.5-minute quadrangles cannot be assumed to exceed National Map Accuracy Standards for 1:24,000 scale maps (+/- 40 feet or 12 meters).

Data Source: 
1:24,000-scale USGS 7.5-minute quadrangles 

Processing Steps: 
During the time period 1990-1995, the BaseMap data layers were digitized from USGS 7.5-minute quadrangles using MicroStation CADD. A total of 1745 quadrangles were digitized. For any given area, Mn/DOT used the most recent quadrangle available at that time. The digital MicroStation CADD files were converted from State Plane Coordinates to UTM and then converted into ARC/INFO coverages. The ARC/INFO files were merged into statewide, seamless coverages and then attributes were added. The coverage has been updated continuously as information has come in to the Geographic Information and Mapping Unit.

MAIN_RR_OPERATOR_CODE
RAIL_SECTION_ID
RR_DIVISION_CODE
RR_SUBDIVISION_CODE
RR_SECTION_CODE
PROPOSED_DATE
ACTIVE_DATE
RETIRE_DATE
EDITED_DATE
COMMENTS
SHAPE
SHAPE_LENGTH

MAIN_RR_OPERATOR_CODE: The code representing the name of the Railroad
RAIL_SECTION_ID: Unique route number field.  Serves as the unique identifier for this data table.
RR_DIVISION_CODE: The name of the Rail Division
RR_SUBDIVISION_CODE: The name of the Rail Subdivision
RR_SECTION_CODE: The name of the Section
PROPOSED_DATE: The date the rail line was proposed.
ACTIVE_DATE: The date the rail line was activated.
RETIRE_DATE: The date the rail line was retired.
EDITED_DATE: The date the feature was lasted edited.
COMMENTS: A field to hold miscellaneous comments from editors.
SHAPE: Geometry field for maintaining the rail line work.
SHAPE_LENGTH: Geometry field for maintaining the length of the rail line work.

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