| Address Points of Loudoun County, VA | |
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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 |
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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. |
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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.
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.
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
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.
publication date
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.
1 Harrison Street SE, 2nd Floor
P.O. Box 7000
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.
Topologically Clean
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.
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%.
gives location of structure and driveway access point
Developer provides home and/or driveway locations for planned subdivision
Address layer created to assign and maintain addresses for new development and commercial properties.
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.
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.
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.
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.
Internal feature number.
ESRI
Type of Address point
Loudoun County
a unique identifier assigned to each street name in the county
Loudoun County
5-digit address number unless previously established with fewer digits w/in Town jurisdiction
Loudoun County
address number extension such as a letter or number
Loudoun County
Source that created or updated feature class
Loudoun County
Feature creation or modification date
Loudoun County
Not for public distribution. Internal User ID of editor creating or modifying a feature. Intended to track and audit features internally by County
Loudoun County
internal tracking number
Loudoun County
9 digit parcel ID associated with the address point
Loudoun County
Feature geometry.
ESRI
The unique Loudoun County identification number for address
Loudoun County
Date address is added into GIS
Loudoun County
Use of address
Loudoun County
Date address is removed from GIS
Loudoun County
AD_POINT_TYPE: access or building point
Code Description 1 access point 2 building address point
AD_UPD_SOURCE: Source that created or updated feature class
Code Description 0 Undetermined 1 Legacy 2 County 3 Contract
AD_USE: Use of address
Code Description C Commercial R Residential
1 Harrison Street SE, 2nd Floor
P.O. Box 7000
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
ESRI Geodatabase Feature Class
ESRI Shapefile
AutoCad Digital Exchange File
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.
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.
1 Harrison Street SE, P.O. Box 7000, 2nd Floor