Metrorail Service Districts of Loudoun County, VA

Metadata also available as

Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:: Loudoun County, VA, Office of Mapping and Geographic Information (OMAGI)
Originator: Loudoun County, VA, Department of Planning, Demographer
Publication_Date: 20130430
Title: Metrorail Service Districts of Loudoun County, VA
Geospatial_Data_Presentation_Form: vector digital data

Description:

Abstract:: At the July 3, 2012 Loudoun Board of Supervisor's Business Meeting, the Board agreed to be a funding partner with the Metropolitan Washington Airports Authority (MWAA) and Fairfax County for the Phase II extension of Metrorail to Dulles Airport and Ashburn. Loudoun County’s rail service districts were established on December 5, 2012 to fund the construction and maintenance of the stations, rail line, and rail related facilities and services. All parcels in the districts, residential and commercial, have a special property tax rate for funding of the rail. Tax collection for the districts is for Tax Year 2013 and future years. At the time the districts were established, the districts encompassed primarily commercial land. Only a few existing residential units were included within these districts at the time the districts were establishedThe boundaries of the Metrorail Service District were defined using physical features such as major roads and streams within two miles of stations. In some cases, parcel boundaries were used to develop this boundary. The Route 606/Airport and Route 772 station service districts were defined using parcel boundaries following approximate half-mile radii around the four proposed rail stations in or near Loudoun County: 1) Route 772, 2) Route 606, 3) Dulles Airport, and 4) Route 28. In cases where a parcel followed a road right of way and the road was used as a boundary of the Metrorail Service District, then the road right of way was used in place of the road centerline to draw the Metrorail Service District boundary. This allowed for station district boundaries to be coincident with the Metrorail Service District boundary.**The features the boundaries follow may have been generalized due to scale and intended use.**
Purpose:: This layer identifies the locations of the three metrorail service districts in Louodun County, VA.

Status:

Progress: Complete
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -77.520272
East_Bounding_Coordinate: -77.407952
North_Bounding_Coordinate: 39.017895
South_Bounding_Coordinate: 38.918216

Keywords:

Theme:

Theme_Keyword_Thesaurus: none; Employee generated
Theme_Keyword: Metrorail, Service District,Tax District

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Theme_Keyword: transportation

Place:

Place_Keyword_Thesaurus: none; Employee generated
Place_Keyword: Loudoun
Place_Keyword: County
Place_Keyword: Virginia

Access_Constraints: None

Use_Constraints:

These data were generated for use by Loudoun County and are available to the public. These data are intended for use at 1:2400 scale or smaller. Acknowledgement of Loudoun County would be appreciated in products derived from this data.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Loudoun County, VA, OMAGI

Contact_Position: Public Information Counter

Contact_Address:

Address_Type: mailing and physical
Address: 1 Harrison Street SE, 2nd floor
Address: MS 65
City: Leesburg
State_or_Province: VA
Postal_Code: 20175
Country: US

Contact_Voice_Telephone: (703)771-5778

Contact_Facsimile_Telephone: (703)771-5075

Contact_Electronic_Mail_Address: mapping@loudoun.gov

Hours_of_Service: 8:00-4:30 EST, M-F

Native_Data_Set_Environment:

Microsoft Windows Server 2008 Version 6.0 (Build 6002) Service Pack 2; ESRI ArcGIS 10.0.5.4400

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:: Retention of attribute accuracy throughout the personal geodatabase or shapefile to ArcSDE geodatabase feature class conversion process was ensured by a manual or automatic QA/QC programmatic check. To meet satisfactory QA/QC requirements the input coverage and output feature class must have, on a record by record basis, identical attribution when comparing all concatenated fields to all the user-defined attribution.

Logical_Consistency_Report: Topologically clean

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:: Retention of coordinate accuracy throughout the personal geodatabase or shapefile to ArcSDE geodatabase feature class conversion process was ensured by a manual or automatic QA/QC programmatic check. To meet satisfactory QA/QC requirements the input coverage and output feature class must have the same record total, and on a record by record basis, area, perimeter, and length differential of less than +/- 0.5%.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: MWAA
Title: Latest projected Metrorail stations

Type_of_Source_Media: None

Source_Citation_Abbreviation: Latest projected Metrorail stations

Source_Contribution:

Latest projected Metrorail stations provided to OMAGI in April 2012 for proposed District development

Process_Step:

Process_Description:

County staff developed the proposed alternate tax district boundaries based on the proposal of Loudoun County Board of Supervisor's member Shawn William (Broad Run District), using physical features such as major roads and streams near these boundary buffers.

Process_Date: 20120615

Process_Time: 120000

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Loudoun County, VA, OMAGI

Contact_Position: GIS Specialist

Process_Step:

Process_Description:: As of July 3rd, the station district boundaries were to be defined using half-mile radii forming circles around the proposed rail stations as an approximate guideline. Subsequent to the July 3rd Business Meeting, staff reviewed the parcels within or nearly a half-mile from the stations. Staff recommends establishing the boundaries as shown. Staff also recommends consolidating the Airport and Route 606 station development districts. The primary reason for combining these station districts is to ensure that the 606 Rail Station – which sits on airport property – is physically located within the 606 station development district. In addition, these station districts have overlapping areas and are adjacent to each other. Therefore, staff has combined the Airport and 606 Station districts and named it the Route 606/Airport Station Service District. The Station District was also adjusted to include other parcels that are owned by Dulles Airport per instruction by Loudoun County staff.
Process_Date: 20120912

Process_Step:

Process_Description:: Both of the individual Station Districts & individual Metrorail Tax District were combined into a single GIS layer for inclusion in OMAGI's standard GIS database. All boundaries remained unchanged and attributes were added to the layer to differentiate between the overall Metrorail Tax District & individual Station Districts.
Process_Date: 20120928

Process_Step:

Process_Description:: The Metrorail Service District boundary was updated to solely follow parcel boundaries.
Process_Date: 20130422

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 3

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: Lambert Conformal Conic

Lambert_Conformal_Conic:

Standard_Parallel: 38.03333333333333
Standard_Parallel: 39.2
Longitude_of_Central_Meridian: -78.5
Latitude_of_Projection_Origin: 37.66666666666666
False_Easting: 11482916.66666666
False_Northing: 6561666.666666666

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.00000002708842039567117
Ordinate_Resolution: 0.00000002708842039567117

Planar_Distance_Units:

Geodetic_Model:

Horizontal_Datum_Name: D North American 1983 HARN
Ellipsoid_Name: GRS 1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: GISDBB.GISBROW.METRORAIL_DISTRICTS_POLY

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI