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Address Points of Loudoun County, VA

Data format: SDE Feature Class

File or table name: GISDBB.GISBROW.ADDRESS_POINT

Coordinate system: Lambert Conformal Conic

Theme keywords: location, address, point, location, structure, access, public safety
Abstract: Address points mark the location of each addressable commercial and residential structure and its access point. The access point is the place where a driveway intersects the road. The building point is where the structure is located. An addressable structure is one where people live, work, or gather.

FGDC and ESRI Metadata:
Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.
Identification Information:


Citation:
Citation information:
Originators: Loudoun County, Virginia, Office of Mapping and Geographic Information (OMAGI)


Title:
Address Points of Loudoun County, VA
*File or table name: GISDBB.GISBROW.ADDRESS_POINT


Publication date: Present
*Geospatial data presentation form: vector digital data


Online linkage: see distribution information


Description:
Abstract:
Address points mark the location of each addressable commercial and residential structure and its access point. The access point is the place where a driveway intersects the road. The building point is where the structure is located. An addressable structure is one where people live, work, or gather.

Purpose:
The access point is used to assign an address to the structure. Addresses are assigned to assist in the provision of emergency services; they can be queried at all Fire and Rescue stations and by E-911 dispatchers

Supplemental information:
Data are stored in the corporate ArcSDE Geodatabase as a point feature class. The coordinate system is Virginia State Plane (North), Zone 4501, datum NAD83 HARN.

*Language of dataset: en


Time period of content:
Time period information:
Range of dates/times:
Beginning date: 1987
Ending date: present

Currentness reference:
publication date

Status:
Progress: In work
Maintenance and update frequency: Daily

Spatial domain:
Bounding coordinates:
*West bounding coordinate: -77.964290
*East bounding coordinate: -77.330341
*North bounding coordinate: 39.321979
*South bounding coordinate: 38.848725

Local bounding coordinates:
*Left bounding coordinate: 11635475.713333
*Right bounding coordinate: 11813849.950000
*Top bounding coordinate: 7164956.915000
*Bottom bounding coordinate: 6994233.305000

Keywords:
Theme:
Theme keywords: location
Theme keyword thesaurus: ISO 19115

Theme:
Theme keywords: address, point, location, structure, access, public safety
Theme keyword thesaurus: none

Place:
Place keywords: Loudoun, County, Virginia
Place keyword thesaurus: none

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. 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.

Point of contact:
Contact information:
Contact organization primary:
Contact organization: Loudoun County, VA, OMAGI
Contact position: Addressing Coordinator


Contact address:
Address type: mailing and physical address
Address:
1 Harrison Street SE, 2nd Floor
Address:
P.O. Box 7000
City: Leesburg
State or province: Va
Postal code: 20175
Country: USA

Contact voice telephone: 703.771.5778
Contact facsimile telephone: 703.771.5075


Contact electronic mail address: mapping@loudoun.gov


Hours of service: 8:00-5:00 EST, M-F



Security information:
Security classification: Public Information

*Native dataset format: SDE Feature Class
*Native data set environment:
Microsoft Windows Vista Version 6.0 (Build 6002) Service Pack 2; ESRI ArcCatalog 9.3.1.4000


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Data Quality Information:


Attribute accuracy:
Attribute accuracy report:
Retention of attribute accuracy throughout the coverage to geodatabase feature class conversion process was ensured by a 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

Completeness report:
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.

Positional accuracy:
Horizontal positional accuracy:
Horizontal positional accuracy report:
Currently the addresses are being moved within the building footprints. It is an ongoing project and the accuracy cannot be determined at this time. Retention of coordinate accuracy throughout the coverage to geodatabase feature class conversion process was ensured by a 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:
Originators: Land owner, Building and Development approval


Title:
Address Applications


Source contribution:
gives location of structure and driveway access point

Source information:
Source citation:
Citation information:
Originators: Subdivision Land Developer


Title:
Addres Plat


Type of source media: mylar
Source contribution:
Developer provides home and/or driveway locations for planned subdivision

Process step:
Process description:
Address layer created to assign and maintain addresses for new development and commercial properties.

Process date: 1987


Process contact:
Contact information:
Contact organization primary:
Contact organization: Loudoun County, VA, OMAGI
Contact position: Address Coordinator


Process step:
Process description:
The rural route and box addresses were not being maintained at the time by the County. In 1990, the rural readdressing program was initiated by the Board of Supervisors in order to name all roads in the county and to assign addresses to all rural routes. The process to create an addressing ordinance was also initiated at this time. The addressing ordinance was passed 1/21/92.

Process date: 1/21/92


Process contact:
Contact information:
Contact organization primary:
Contact organization: Loudoun County, VA, OMAGI
Contact position: Addressing Coordinator


Process step:
Process description:
This data set was part of a batch process that converted legacy data from ArcInfo coverage in Librarian to a single-tiled ArcInfo coverage in preparation for a final conversion to ArcSDE Geodatabase Feature Classes. Data were extracted from Librarian using the EXTRACT TOPOLOGICAL command. Multi-tiled data sets were extracted into multiple coverages and then combined based on the feature type(s). Layers with both polygon and arc feature classes were processed with the Arc commands MAPJOIN and DISSOLVE. Arc feature classes alone were processed with the Arc commands, APPEND and DISSOLVE. Layers with both arc and point feature classes and point feature classes alone were processed with the Arc command, APPEND. When used, the arc command, DISSOLVE, was given with the <#all> option. All coverages were then reprojected to HARN83 using the following .prj file specifications: INPUT PROJECTION STATEPLANE UNITS FEET ZONE 5551 DATUM NAD27 NADCON PARAMETERS OUTPUT PROJECTION STATEPLANE UNITS FEET FIPSZONE 4501 DATUM HPGN NADCON PARAMETERS END The dataset was then converted to a feature class in a geodatabase in ArcSDE.

Process date: 2004


Process contact:
Contact information:
Contact organization primary:
Contact organization: Loudoun County, VA, OMAGI
Contact position: GIS Analyst


Process step:
Process description:
Current process: Rural addresses are assigned at the time that a landowner builds a house. The address is applied for and a map with the house and driveway location is provided. Land development addresses are assigned to lots less than three acres when a record plat is recorded. Commercial and multi-family residential addresses are assigned at the time of site plan approval. An address is based on where the driveway or main access to a commercial/multi-family structure meets the road.

Process date: current


Process contact:
Contact information:
Contact organization primary:
Contact organization: Loudoun County, VA, OMAGI
Contact position: Addressing Coordinator


Process step:
Process description:
Address points participate in an SDE Feature Data Set Topology with Parcel Polygons. The rule, "Address Point must be properly inside Parcel Polygon" is validated daily.

Process date: current


Process contact:
Contact information:
Contact organization primary:
Contact organization: Loudoun County, VA, OMAGI
Contact position: Addressing Coordinator


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Spatial Data Organization Information:


Indirect spatial reference method:
Loudoun County


*Direct spatial reference method: Vector


Point and vector object information:
SDTS terms description:
*Name: GISDBB.GISBROW.ADDRESS_POINT
*SDTS point and vector object type: Entity point
*Point and vector object count: 213652

ESRI terms description:
*Name: GISDBB.GISBROW.ADDRESS_POINT
*ESRI feature type: Simple
*ESRI feature geometry: Point
*ESRI topology: FALSE
*ESRI feature count: 213652
*Spatial index: FALSE
*Linear referencing: FALSE


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Spatial Reference Information:


Horizontal coordinate system definition:
Coordinate system name:
*Projected coordinate system name: NAD_1983_HARN_StatePlane_Virginia_North_FIPS_4501_Feet
*Geographic coordinate system name: GCS_North_American_1983_HARN

Planar:
Map projection:
*Map projection name: Lambert Conformal Conic
Lambert conformal conic:
*Standard parallel: 38.033333
*Standard parallel: 39.200000
*Longitude of central meridian: -78.500000
*Latitude of projection origin: 37.666667
*False easting: 11482916.666667
*False northing: 6561666.666667

Planar coordinate information:
*Planar coordinate encoding method: coordinate pair
Coordinate representation:
*Abscissa resolution: 0.000208
*Ordinate resolution: 0.000208
*Planar distance units: survey feet

Geodetic model:
*Horizontal datum name: D_North_American_1983_HARN
*Ellipsoid name: Geodetic Reference System 80
*Semi-major axis: 6378137.000000
*Denominator of flattening ratio: 298.257222

Vertical coordinate system definition:
Altitude system definition:
*Altitude resolution: 1.000000
*Altitude encoding method: Explicit elevation coordinate included with horizontal coordinates

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Entity and Attribute Information:


Detailed description:
*Name: GISDBB.GISBROW.ADDRESS_POINT


Entity type:
*Entity type label: GISDBB.GISBROW.ADDRESS_POINT
*Entity type type: Feature Class
*Entity type count: 213652
Entity type definition:
point feature class
Entity type definition source:
ESRI

Attribute:
Attribute label: OBJECTID
*Attribute alias: OBJECTID
Attribute definition:
Internal feature number.
Attribute definition source:
ESRI

*Attribute type: OID
*Attribute width: 4
*Attribute precision: 10
*Attribute scale: 0


Attribute domain values:
Unrepresentable domain:
Sequential unique whole numbers that are automatically generated.


Attribute:
Attribute label: AD_POINT_TYPE
*Attribute alias: AD_POINT_TYPE
Attribute definition:
Type of Address point
Attribute definition source:
Loudoun County

*Attribute type: String
*Attribute width: 1
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
Enumerated domain:
Enumerated domain value: See Entity and Attribute Detail Citation for Data Dictionary

Attribute:
Attribute label: AD_CHAIN_ID
*Attribute alias: AD_CHAIN_ID
Attribute definition:
a unique identifier assigned to each street name in the county
Attribute definition source:
Loudoun County

*Attribute type: Integer
*Attribute width: 4
*Attribute precision: 10
*Attribute scale: 0


Attribute:
Attribute label: AD_ADDRESS
*Attribute alias: AD_ADDRESS
Attribute definition:
5-digit address number unless previously established with fewer digits w/in Town jurisdiction
Attribute definition source:
Loudoun County

*Attribute type: Integer
*Attribute width: 4
*Attribute precision: 10
*Attribute scale: 0


Attribute domain values:
Unrepresentable domain:
User generated text


Attribute:
Attribute label: AD_ADDRESS_EXT
*Attribute alias: AD_ADDRESS_EXT
Attribute definition:
address number extension such as a letter or number
Attribute definition source:
Loudoun County

*Attribute type: String
*Attribute width: 5
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
Unrepresentable domain:
User generated text


Attribute:
Attribute label: AD_UPD_SOURCE
*Attribute alias: AD_UPD_SOURCE
Attribute definition:
Source that created or updated feature class
Attribute definition source:
Loudoun County

*Attribute type: SmallInteger
*Attribute width: 2
*Attribute precision: 5
*Attribute scale: 0


Attribute domain values:
Enumerated domain:
Enumerated domain value: See Entity and Attribute Detail Citation for Data Dictionary

Attribute:
Attribute label: AD_UPD_DATE
*Attribute alias: AD_UPD_DATE
Attribute definition:
Feature creation or modification date
Attribute definition source:
Loudoun County

*Attribute type: Date
*Attribute width: 36
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
Unrepresentable domain:
User generated text


Attribute:
Attribute label: AD_UPD_USER
*Attribute alias: AD_UPD_USER
Attribute definition:
Not for public distribution. Internal User ID of editor creating or modifying a feature. Intended to track and audit features internally by County
Attribute definition source:
Loudoun County

*Attribute type: SmallInteger
*Attribute width: 2
*Attribute precision: 5
*Attribute scale: 0


Attribute:
Attribute label: AD_ADDRESS_TASK
*Attribute alias: AD_ADDRESS_TASK
Attribute definition:
internal tracking number
Attribute definition source:
Loudoun County

*Attribute type: String
*Attribute width: 11
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
Unrepresentable domain:
User generated text


Attribute:
Attribute label: AD_MCPI
*Attribute alias: AD_MCPI
Attribute definition:
9 digit parcel ID associated with the address point
Attribute definition source:
Loudoun County

*Attribute type: String
*Attribute width: 12
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
Unrepresentable domain:
User generated text


Attribute:
Attribute label: SHAPE
*Attribute alias: Shape
Attribute definition:
Feature geometry.
Attribute definition source:
ESRI

*Attribute type: Geometry
*Attribute width: 4
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
Unrepresentable domain:
Coordinates defining the features.


Attribute:
Attribute label: AD_LOUD_ID
*Attribute alias: AD_LOUD_ID
Attribute definition:
The unique Loudoun County identification number for address
Attribute definition source:
Loudoun County

*Attribute type: Integer
*Attribute width: 4
*Attribute precision: 10
*Attribute scale: 0


Attribute domain values:
Unrepresentable domain:
User generated text


Attribute:
Attribute label: AD_ADD_DATE
*Attribute alias: AD_ADD_DATE
Attribute definition:
Date address is added into GIS
Attribute definition source:
Loudoun County

*Attribute type: Date
*Attribute width: 36
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
Unrepresentable domain:
User generated text


Attribute:
Attribute label: AD_USE
*Attribute alias: AD_USE
Attribute definition:
Use of address
Attribute definition source:
Loudoun County

*Attribute type: String
*Attribute width: 1
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
Enumerated domain:
Enumerated domain value: See Entity and Attribute Detail Citation for Data Dictionary

Attribute:
Attribute label: AD_END_DATE
*Attribute alias: AD_END_DATE
Attribute definition:
Date address is removed from GIS
Attribute definition source:
Loudoun County

*Attribute type: Date
*Attribute width: 36
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
Unrepresentable domain:
User generated text


Attribute value accuracy information:
Attribute value accuracy: Not currently maintained

Overview description:
Entity and attribute overview:
AD_POINT_TYPE: access or building point

Entity and attribute detail citation:
Code Description 1 access point 2 building address point

Overview description:
Entity and attribute overview:
AD_UPD_SOURCE: Source that created or updated feature class

Entity and attribute detail citation:
Code Description 0 Undetermined 1 Legacy 2 County 3 Contract

Overview description:
Entity and attribute overview:
AD_USE: Use of address

Entity and attribute detail citation:
Code Description C Commercial R Residential

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Distribution Information:


Distributor:
Contact information:
Contact organization primary:
Contact organization: Loudoun County, VA, OMAGI
Contact position: Public Information Counter


Contact address:
Address type: mailing and physical address
Address:
1 Harrison Street SE, 2nd Floor
Address:
P.O. Box 7000
City: Leesburg
State or province: VA
Postal code: 20175
Country: USA

Contact voice telephone: 703.771.5778
Contact facsimile telephone: 703.771.5075


Contact electronic mail address: mapping@loudoun.gov


Hours of service: 8:00-5:00 EST, M-F



Resource description: Offline Data


Distribution liability:
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, either 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

Standard order process:
Digital form:
Digital transfer information:
Format name: GDB
Format specification:
ESRI Geodatabase Feature Class

Digital transfer option:
Offline option:
Offline media: CD-ROM

Digital form:
Digital transfer information:
Format name: SHP
Format specification:
ESRI Shapefile

Digital transfer option:
Offline option:
Offline media: CD-ROM

Digital form:
Digital transfer information:
Format name: DXF
Format specification:
AutoCad Digital Exchange File

Digital transfer option:
Offline option:
Offline media: CD-ROM

Fees: Loudoun County distributes spatial data in ArcGIS coverage or shapefile format for the cost of reproduction. Countywide spatial datasets may be purchased for 21perCDor21 per CD or 21perCDor22 per DVD for up to 650 MB or 4.5 GB of data, respectively. There is a 10surchargetopurchasecountywidetopography,anda10 surcharge to purchase countywide topography, and a 10surchargetopurchasecountywidetopography,anda3 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.
Ordering instructions:
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.


Standard order process:
Non-digital form:
Address Maps available


Ordering instructions:
Visit our website at: <http://www.loudoun.gov/omagi/index.htm>, click on "OMAGI Documents and Information." Our "Products & Services" link will lead you to order forms and lists of available data. Hardcopy maps may also be available; please contact the Mapping Office Public Information Counter for more information regarding all data requests.


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Metadata Reference Information:


*Metadata date: 20111020


*Language of metadata: en


Metadata contact:
Contact information:
Contact organization primary:
Contact organization: Loudoun County, VA, OMAGI
Contact position: Metadata Specialist


Contact address:
Address type: mailing and physical address
Address:
1 Harrison Street SE, P.O. Box 7000, 2nd Floor
City: Leesburg
State or province: VA
Postal code: 20175
Country: USA

Contact voice telephone: 703.771.5778
Contact facsimile telephone: 703.771.5075


Contact electronic mail address: mapping@loudoun.gov


Hours of service: 8:00-5:00 EST, M-F



*Metadata standard name: FGDC Content Standards for Digital Geospatial Metadata
*Metadata standard version: FGDC-STD-001-1998
*Metadata time convention: local time


Metadata use constraints:
This metadata reflects the source Geodatabase format and specific elements may not apply if your data is exported to SHP, DXF, or .e00 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 extensions:
*Online linkage: http://www.esri.com/metadata/esriprof80.html
*Profile name: ESRI Metadata Profile

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