Virginia House Districts of Loudoun County, VA (2021)

ISO-19139 Metadata

Resource Identification Information:

Citation:
Title:  Virginia House Districts of Loudoun County, VA (2021)

Reference date - publication:  2012-01-19

Presentation format:  mapDigital

Party responsible for the resource - originator: 
Organization's name: Loudoun County, VA, Department of Management and Financial Services

Themes or categories of the resource:  boundaries, society

Place keywords:
Keywords:  County, Loudoun, Virginia, 51107

Thesaurus name:
Title:  none; Employee generation

Place keywords:
Keywords:  County, Loudoun, Virginia, 51107

Thesaurus name:
Title:  none; Employee generation

Place keywords:
Keywords:  County, Loudoun, Virginia, 51107

Thesaurus name:
Title:  none; Employee generation

Place keywords:
Keywords:  County, Loudoun, Virginia, 51107

Thesaurus name:
Title:  none; Employee generation

Theme keywords:
Keywords:  House, redistricting, election, Virginia, district

Thesaurus name:
Title:  none; Employee generation

Theme keywords:
Keywords:  House, redistricting, election, Virginia, district

Thesaurus name:
Title:  none; Employee generation

Theme keywords:
Keywords:  House, redistricting, election, Virginia, district

Thesaurus name:
Title:  none; Employee generation

Theme keywords:
Keywords:  House, redistricting, election, Virginia, district

Thesaurus name:
Title:  none; Employee generation

Theme keywords:
Keywords:  House, redistricting, election, Virginia, district

Thesaurus name:
Title:  none; Employee generation

Descriptive keywords:
Keywords:  Downloadable Data

Thesaurus name: ArcGIS Content Type
Abstract:  This layer represents the Virginia House districts that are within Loudoun County. Virginia House districts represent the area that each elected member of the Virginia House represents. The House districts are revised and adopted by the Commonwealth of Virginia each decade. The Commonwealth of Virginia redraws its House districts based of the results of the most recent decennial census, in this case the 2020 Census. The Virginia Supreme Court unanimously approved congressional maps for the state and district maps for the Virginia House of Delegates and Virginia State Senate on December 28, 2021.

Purpose: This data was produced in compliance with the constitution of the Commonwealth of Virginia, which mandates the Commonwealth to redraw its House election districts based of the results of the most recent decennial census, in this case 2020. Redrawing the boundaries ensures equal representation of the population. Each House election district is required to have a similar population count. There are 100 House districts in the Commonwealth of Virginia and each House district is within +/- 1% of the equalized decennial census population, which is calculated using the Commonwealth of Virginia's decennial Census population divided by the number of districts.

Dataset language:  eng
Dataset character set:  utf8

Status:  completed
Maintenance:
Update frequency:  asNeeded


Resource constraints:
Constraints:
Limitations of use: 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.

Limitations of use: Every reasonable effort has been made to assure the accuracy of these data. Loudoun County, Virginia does not assume any liability arising from the use of these data. These data are provided without warranty of any kind, expressed or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular service. Reliance on these data is at the risk of the user.

Spatial representation type:  vector

Processing environment:  Version 6.2 (Build 9200) ; Esri ArcGIS 10.8.1.14362

Extent:
Geographic element - Bounding rectangle:
Extent contains the resource: true
West longitude: -77.963438
East longitude: -77.323979
North latitude: 39.326191
South latitude: 38.844269
Supplemental information: Data are stored in the corporate ArcSDE Geodatabase as a polygon feature class. The coordinate system is Virginia State Plane (North), Zone 4501, datum NAD83 HARN (vertical datum, if applicable, NAVD88), US Survey foot units.

Point of contact - pointOfContact: 
Organization's name: Loudoun County, VA, Department of Management and Financial Services
Contact's position: Demographer

Contact information:
Phone:
Voice: (703) 777-0563
Address:
Delivery point: MS 41
Delivery point: 1 Harrison St. SE
City: Leesburg
Administrative area: VA
Postal code: 20175
Country:  US
Hours of service: 8:30-5:00 EST, M-F

Spatial Representation - Vector:

Level of topology for this dataset:  geometryOnly
Geometric objects:
Object type:  composite
Object count: 5

Spatial Representation - Vector:

Level of topology for this dataset:  geometryOnly
Geometric objects:
Object type:  composite
Object count: 5

Reference System Information:

Reference system identifier:
Value: 2924
Code space: EPSG
Version: 8.9.3(9.0.0)

Data Quality Information:

Scope of quality information:
Level of the data:dataset

Lineage:
Process step:
When the process occurred:  2011-01-01T00:00:00
Description: Census block shapefiles were downloaded from the U.S. Census Bureau. Overlaid the Census Bureau block shapefile with Loudoun County Government's detailed GIS layers to determine the actual location of the physical features, natural features, and governmental units such as town boundaries that the census blocks are designated to follow. Digitized block lines using Loudoun County Government's detailed GIS layers. Created the House district GIS layer by joining the Virginia Division of Legislative Affair's House district block assignment file to Loudoun's spatially enhanced census block layer and then spatially dissolving the census block layer.

Process contact - processor: 
Organization's name: Loudoun County, VA, Office of Mapping & Geographic Information (OMAGI)
Contact's position: GIS Specialist

Source data:
Level of the source data: Digital text file of Virginia House District designation on Census Block level

Source citation:
Title:  Virginia Division of Legislative Affairs new House District HB 5005/Ch.1 enacted 4/29/11

Party responsible for the resource - originator: 
Organization's name: Virginia State Delegation

Extent:
Extent description: publication date

Source data:
Level of the source data: Provided the foundation upon which census blocks were drawn. The 2020 Census blocks were the basis for devising the election district boundaries.

Source citation:
Title:  U.S. Census Bureau TIGER/Line files

Presentation format:  mapDigital

Party responsible for the resource - originator: 
Organization's name: U.S. Census Bureau

Extent:
2011-01-01
Source data:
Level of the source data: Demographic data source for population, housing units, and households for House Districts

Source citation:
Title:  U.S. Census Bureau, 2020 Decennial Census summary file.

Party responsible for the resource - originator: 
Organization's name: U.S. Census Bureau

Data quality report - Completeness omission:
Evaluation method: Features may have been eliminated or generalized due to scale and intended use. To assist Loudoun County, Virginia in the maintenance of the data, please provide any information concerning discovered errors, omissions, or other discrepancies found in the data.

Data quality report - Conceptual consistency:
Measure description: Topologically clean

Data quality report - Completeness omission:
Measure description: Features may have been eliminated or generalized due to scale and intended use. To assist Loudoun County, Virginia in the maintenance of the data, please provide any information concerning discovered errors, omissions, or other discrepancies found in the data.

Data quality report - Quantitative attribute accuracy:
Measure description: Retention of attribute accuracy throughout the personal geodatabase or shapefile to ArcSDE geodatabase feature class coversion 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.

Data quality report - Absolute external positional accuracy:
Measure description: 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%.

Distribution Information:

Distributor:
Distributor information - distributor: 
Organization's name: Loudoun County, VA, Office of Mapping and Geographic Information (OMAGI)
Contact's position: Public Information Counter

Contact information:
Phone:
Voice: (703)771-5778
Fax: (703)771-5075
Address:
Delivery point: MS 65
Delivery point: 1 Harrison Street S.E., 2nd floor
City: Leesburg
Administrative area: VA
Postal code: 20175
Country:  US
e-mail address: mapping@loudoun.gov
Hours of service: 8:00-4:30 EST, M-F
Format:
Format name: DXF
Format specification: AutoCad Digital Exchange File

Format:
Format name: GDB
Format specification: ESRI Personal Geodatabase Feature Class

Format:
Format name: SHP
Format specification: ESRI Shapefile

Ordering process:
Terms and fees: Loudoun County distributes spatial data in ArcGIS database or shapefile & DXF format for the cost of reproduction. Countywide spatial datasets may be purchased for $22 per DVD for up to 4.5 GB of data. There is a $100 surcharge to purchase countywide topography, and a $3 charge if the item is to be mailed. If the customer wants the data in DXF format and/or would like OMAGI to custom select specific geographic areas of the County, there is an additional $7 per 15 minute increment labor charge. Select aerial imagery is also available.
Turnaround time: Size limit: 4.5 GB. Visit our website at: http://www.loudoun.gov/omagi, click on "Loudoun County Mapping Documents & Order Forms." The "Forms" directory will lead you to custom & standard (countywide) data order forms. Hardcopy maps may also be available; please contact the Mapping Office Public Information Counter for more information regarding all data requests.

Transfer options:
Units of distribution (e.g., tiles): Tiles

Medium of distribution:
Medium name:  dvd

Format:
Format name: File Geodatabase Feature Class

Metadata Information:

Metadata language:  eng
Metadata character set:  utf8


Last update:  2022-02-28

Metadata constraints:
Constraints:
Limitations of use: This metadata reflects the source Geodatabase format and specific elements may not apply if your data is exported to SHP or DXF products. User must be aware that changes to data schema occur during data export that may not be reflected in this metadata, which represents Loudoun County's corporate geodatabase. Acknowledgement of Loudoun County would be appreciated in the use of this metadata.

Metadata contact - pointOfContact: 
Organization's name: Loudoun County, VA, OMAGI
Contact's position: Metadata Specialist

Contact information:
Phone:
Voice: (703)771-5778
Fax: (703)771-5075
Address:
Delivery point: MS 65
Delivery point: 1 Harrison Street SE, 2nd Floor
City: Leesburg
Administrative area: VA
Postal code: 20175
Country:  US
e-mail address: mapping@loudoun.gov
Hours of service: 8:00-4:30 EST, M-F
Scope of the data described by the metadata:  dataset
Scope name: dataset

Name of the metadata standard used: ISO 19139 Geographic Information - Metadata - Implementation Specification
Version of the metadata standard: 2007