20220719
13061800
FALSE
20210108
12432100
20210108
12432100
GISDBP.GPROD.WELLPOLL_POINT
002
11638261.259178
11812867.543860
6994096.274069
7165204.454257
1
Projected
GCS_North_American_1983_HARN
Linear Unit: Foot_US (0.304801)
NAD_1983_HARN_StatePlane_Virginia_North_FIPS_4501_Feet
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Published
FGDC
1.0
FGDC CSDGM Metadata
Loudoun County, VA, OMAGI
Metadata Specialist
(703)771-5778
(703)771-5075
MS 65
1 Harrison Street SE, 2nd Floor
Leesburg
VA
20175
US
mapping@loudoun.gov
8:00-4:30 EST, M-F
20210108
ArcGIS Metadata
1.0
Loudoun County, VA, OMAGI
Public Information Counter
(703)771-5778
(703)771-5075
MS 65
1 Harrison Street SE, 2nd Floor
Leesburg
VA
20175
US
mapping@loudoun.gov
8:00-4:30 EST, M-F
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.
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.
DXF
AutoCad Digital Exchange File
GDB
ESRI Personal Geodatabase Feature Class
SHP
ESRI Shapefile
Tiles
Feature Class
Water Wells and Pollution Sources of Loudoun County, VA
Loudoun County, VA, Health Department
vector digital data
withheld
2011-10-13T00:00:00
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>WELLPOLL is a data set of water wells and pollution sources in the county that have been identified and assigned a unique SITE-ID number. Cemeteries are included as a potential groundwater and soil pollution source. Within this data set, the majority of wells are individual potable water wells and the majority of pollution sources are individual sewage disposal (septic/drain field) systems. Other types of wells and pollution sources, like cemeteries, also exist in the data and are listed and explained in the data dictionary. Note that all identified pollution sources are not necessarily causing pollution, but rather, can be simply a potential source of pollution. Information for wells comes primarily from State Groundwater Well Completion (GW2) forms completed by well drilling contractors and varies in accuracy and completeness. Information for pollution sources comes primarily from the Health Department permitting and inspection process and/or date of discovery from field verification. This layer is maintained and administered by the Health Department and Department of Building and Development.</SPAN></P></DIV></DIV></DIV>
WELLPOLL was created to provide an easily accessed record of wells and pollution sources and to link these sites to other geographic data within the GIS. For most records, specific construction information and other physical characteristics are available from the County. This information may be used to aid in the evaluation of the groundwater resource in the case of wells, or of certain types of observed or potential pollution problems in the case of pollution sources.
Loudoun County, VA, Health Department
Public Information Counters
(703)777-0234
1 Harrison Street SE, 2nd Floor
MS 68
Leesburg
VA
20175
US
health@loudoun.gov
8:00-5:00 EST, M-F
none; Employee generated
County
Loudoun
Virginia
none; Employee generated
transmissivity
well
sewage disposal
groundwater
drain field
pollution
yield
pollution source
storativity
septic system
transmissivity
health
County
well
sewage disposal
Loudoun
groundwater
drain field
Virginia
pollution
environment
yield
pollution source
storativity
septic system
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.
Version 6.2 (Build 9200) ; Esri ArcGIS 10.7.1.11595
The WELLPOLL layer was developed in 1988 by the County's Environmental Health Department. Records were entered into a database from 40 years of historical paper files, which exhibited a wide range of completeness and accuracy. This was an on-going process until early 1996 at which time the layer was no longer maintained. In late 2000, the Department of Building and Development began a process of updating the layer by entering data from the permit files, which had accumulated since 1996. 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 (vertical datum, if applicable, NAVD88), US Survey foot units.
1
-77.954511
-77.333802
39.322613
38.848383
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.
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.
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.
Retention of attribute accuracy throughout the coverage to geodatabase feature class coversion 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.
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%.
.Records were entered into a database from 40 years of historical paper files, including State Ground Water Well Completion Forms and Health Department permits, inspections, and field checks. They exhibited a wide range of completeness and accuracy. This was an on-going process until early 1996 at which time the layer was no longer maintained.
Loudoun County, VA, Office of Mapping and Geographic Information (OMAGI)
GIS Systems Analyst
1988-01-04T00:00:00
The Department of Building and Development began a process of updating the existing layer by entering data from the permit files, which had accumulated since 1996.
2000-01-01T00:00:00
Loudoun County, VA, Health Department
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 coversion 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 HARN 83 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 This dataset was then converted to a feature class in a geodatabase in ArcSDE
2004-01-05T00:00:00
Loudoun County, VA, OMAGI
Loudoun County Health Department decision to develop WELLPOLL coverage in 1998
1988-01-01
Loudoun County, VA, Health Department
Vector digital data
Loudoun County
0
dataset
EPSG
8.9.3(9.0.0)
Simple
FALSE
0
TRUE
FALSE
GISDBP.GPROD.WELLPOLL_POINT
Feature Class
0
OBJECTID
OBJECTID
OID
4
10
0
Internal feature number.
ESRI
Sequential unique whole numbers that are automatically generated.
WELLPOLL_ID
WELLPOLL_ID
Integer
4
10
0
WE_SITE_ID
WE_SITE_ID
String
14
0
0
A unique alphanumeric identifier for each well or pollution source. Composed of the four-letter ID-CODE (what the item is), the four-digit year of completion, and a four digit sequential cataloging number.
Loudoun County
User defined text code
WE_OLD_ID
WE_OLD_ID
String
12
0
0
Same as the SITE-ID except it uses a two-digit year of completion or date of discovery from field verification identifier.
Loudoun County
User defined text code
WE_TYPE_HP
WE_TYPE_HP
String
1
0
0
Describes if the item is a well or pollution source
Loudoun County
See Overview Description for data dictionary of attribute
WE_ID_CODE
WE_ID_CODE
String
4
0
0
A four-letter code categorizing the type of well or pollution source
Loudoun County
See Overview Description for data dictionary of attribute
WE_ID_YEAR
WE_ID_YEAR
String
4
0
0
The year the well or pollution source was completed or date of discovery from field verification identifier.
Loudoun County
User defined text code
WE_ID_SEQ
WE_ID_SEQ
String
4
0
0
A sequential cataloging number to create unique SITE-ID numbers when multiple sites of the same TYPE and ID-CODE are completed during the same year.
Loudoun County
User defined text code
WE_UPD_SOURCE
WE_UPD_SOURCE
SmallInteger
2
5
0
Source that created or edited feature class
Loudoun County
See Overview Description for data dictionary of attribute
WE_UPD_DATE
WE_UPD_DATE
Date
8
0
0
Date that feature class was created or modified
Loudoun County
User defined text code
WE_UPD_USER
WE_UPD_USER
SmallInteger
2
5
0
Not for public distribution. Internal User ID of editor creating or modifying feature class
Loudoun County
SHAPE
SHAPE
Geometry
4
0
0
Feature geometry.
ESRI
Coordinates defining the features.
WE_SYSTYPE
WE_SYSTYPE
String
20
0
0
WE_TYPE_HP: Describes if the item is a well or pollution source
Type Definition
P Pollution Source
W Well
Blank Unknown
WE_ID_CODE: A four-letter code categorizing the type of well or pollution source
Code Definition
PCEM Cemetery
PHAZ Hazardous waste storage
PSBD Building (e.g. barn)
PSCS Chemical storage tank
PSSD Sewage disposal system
PSSW Solid waste/landfill
PSTP Sewage treatment plant WWCO Community well
WWCS Community spring
WWDH Dry well
WWDU Dug well
WWHP Heat pump well
WWID Industrial well
WWIN Individual well
WWIR Irrigation well
WWMN Monitor well
WWNC Non-community well
WWOB Observation well
WWQM Water quality monitoring well
WWSP Spring
WWTS Test well
WWUN Unknown well
WE_UPD_SOURCE: Source that created or edited feature class
Source Definition
0 Undetermined
1 Legacy (pre 2002)
2 County
3 Contract