

	FAIRFAX COUNTY HYDROGRAPHY 4000 SCALE

Section Index Identification_Information Data_Quality_Information Spatial_Data_Organization_Information Spatial_Reference_Information Entity_and_Attribute_Information Distribution_Information Metadata_Reference_Information Identification Information Section Index Citation: Citation Information: Originator: Fairfax County Government Publication Date: 1/1/1996 Title: Fairfax County Hydrography 4000 scale Geospatial Data Presentation Form: map Publication Information: Publication Place: Fairfax County, Virginia, USA Publisher: Fairfax County Government Description: Abstract: This layer contains location of water features, which includes the waterbodies and linear streams in Fairfax County and is used as a general guide for the location of hydrologic features. In order to accurately represent the water bodies the polygons that are actually water features must be queried using the hydro-pfill attribute. Purpose: To depict water features Time Period of Content: Time Period Information: Multiple Dates/Times: Single Date/Time: Calendar Date: 1995 Currentness Reference: publication date Status: Progress: Complete Maintenance and Update Frequency: As needed Spatial Domain: Bounding Coordinates: West Bounding Coordinate: -77.54533008 East Bounding Coordinate: -77.03408065 North Bounding Coordinate: 39.0804078 South Bounding Coordinate: 38.61389198 Data Set G-Polygon: Data Set G-Polygon Outer G-Ring: G-Ring Point: G-Ring Latitude: 39.0804078 G-Ring Longitude: -77.54533008 G-Ring Point: G-Ring Latitude: 38.61389198 G-Ring Longitude: -77.54533008 G-Ring Point: G-Ring Latitude: 38.61389198 G-Ring Longitude: -77.03408065 G-Ring Point: G-Ring Latitude: 39.0804078 G-Ring Longitude: -77.03408065 G-Ring Point: G-Ring Latitude: 39.0804078 G-Ring Longitude: -77.54533008 Keywords: Theme: Theme Keyword Thesaurus: None Theme Keyword: water Theme Keyword: lake Theme Keyword: hydro Theme Keyword: river Theme Keyword: stream Theme Keyword: pond Place: Place Keyword Thesaurus: None Place Keyword: Fairfax County, Virginia, USA Access Constraints: None Use Constraints: Not for use at scales greater than 1:24000. Acknowledgement of the Fairfax County GIS branch would be appreciated in products derived from these data. Point of Contact: Contact Information: Contact Organization Primary: Contact Organization: Fairfax County GIS and Mapping Services Contact Position: Database Administrator Contact Address: Address Type: mailing and physical address Address: 12000 Government Center Pw. Suite 117 City: Fairfax State or Province: VA Postal Code: 22035 Country: USA Contact Voice Telephone: (703)-324-2712 Contact TDD/TTY Telephone: 711 Contact Facsimile Telephone: (703)-324-3937 Contact Electronic Mail Address: gis.helpq@fairfaxcounty.gov Hours of Service: Monday 8:00am - 4:15pm / Tuesday 9:00am - 4:15pm / Wednesday - Friday 8:00am - 4:15pm (EST) Data Set Credit: ASI for conversion process, Fairfax County GIS and Mapping Services and Engineering Systems for reviewing the data, and various Fairfax County Agencies Native Data Set Environment: ESRI ArcInfo - IBM AIX - Windows - Coverage distribution layer name = disc 1, hydro - Shapefile distribution layer name = disc 1, hydrol, hydrop SDE - LAYER NAMES: GISMGR.HYDRO_POLY_4000 GISMGR.HYDRO_LINE_4000 GISMGR,HYDRO_ANNO_4000 Data Quality Information Section Index Attribute Accuracy: Attribute Accuracy Report: Attribute accuracy is tested by comparison with hardcopy sources. Reported errors are verified and corrected. Logical Consistency Report: Various Arc/Info commands have been used to determine the logical consistency of the data. Once the layer was created, the build command was used to create the polygon topology. If lines were found that did not intersect, they were manually broken to create a node. Dangling arcs were removed if found. Attributes were inspected using the frequency command to ensure valid values. Completeness Report: There are gaps were information could not be identified. Positional Accuracy: Horizontal Positional Accuracy: Horizontal Positional Accuracy Report: Horizontal positional accuracy for the digital data is tested by visual comparison of the source with the hard copy. Lineage: Source Information: Source Citation: Citation Information: Originator: Fairfax County Government Publication Date: 1/1/1996 Title: Fairfax County Hydrography 4000 scale Geospatial Data Presentation Form: map Publication Information: Publication Place: Fairfax County, Virginia, USA Publisher: Fairfax County Government Source Scale Denominator: 48000 Type of Source Media: stable-base material Source Time Period of Content: Time Period Information: Single Date/Time: Calendar Date: 6/1/1995 Source Currentness Reference: publication date Source Citation Abbreviation: wall map Source Information: Source Citation Abbreviation: Hydro coverage Process Step: Process Description: Digitize lines and polygons from wall map. Build for polygon and line topology. Annotation for water body names captured. Source Used Citation Abbreviation: wall map Process Date: 1995 Source Produced Citation Abbreviation: Hydro coverage Process Contact: Contact Information: Contact Organization Primary: Contact Organization: Fairfax County GIS and Mapping Services Contact Position: Database Administrator Contact Address: Address Type: mailing and physical address Address: 12000 Government Center Pw. Suite 117 City: Fairfax State or Province: VA Postal Code: 22035 Country: USA Contact Voice Telephone: (703)-324-2712 Contact TDD/TTY Telephone: 711 Contact Facsimile Telephone: (703)-324-3937 Contact Electronic Mail Address: gis.helpq@fairfaxcounty.gov Hours of Service: Monday 8:00am - 4:15pm / Tuesday 9:00am - 4:15pm / Wednesday - Friday 8:00am - 4:15pm (EST) Spatial Data Organization Information Section Index Indirect Spatial Reference: water features Spatial Reference Information Section Index Horizontal Coordinate System Definition: Geodetic Model: Horizontal Datum Name: North American Datum of 1983 Ellipsoid Name: Geodetic Reference System 80 Semi-major Axis: 6378206 Denominator of Flattening Ratio: 294.9786982 Vertical Coordinate System Definition: Altitude System Definition: Altitude Datum Name: National Geodetic Vertical Datum of 1929 Altitude Distance Units: feet Altitude Encoding Method: Attribute values Entity and Attribute Information Section Index Detailed Description: Entity Type: Entity Type Label: hydro.pat Entity Type Definition: polygon Attribute: Attribute Label: hydro-pfill Attribute Definition: Integer 1 Attribute Domain Values: Enumerated Domain: Enumerated Domain Value: 0 Enumerated Domain Value Definition: No fill non feature Enumerated Domain Value: 1 Enumerated Domain Value Definition: Fill feature Detailed Description: Entity Type: Entity Type Label: hydro.aat Entity Type Definition: arc attribute table Attribute: Attribute Label: hydro-name Attribute Definition: text 50 Attribute Domain Values: Unrepresentable Domain: name of water feature Attribute: Attribute Label: hydro-type Attribute Definition: Text 1 Attribute Domain Values: Enumerated Domain: Enumerated Domain Value: L Enumerated Domain Value Definition: lake/reservoir Enumerated Domain Value: P Enumerated Domain Value Definition: Pond Enumerated Domain Value: R Enumerated Domain Value Definition: River/Canel Enumerated Domain Value: C Enumerated Domain Value Definition: Creek/Stream Overview Description: Entity and Attribute Overview: The features are water bodys and liner water features. Also the annotation contains the name. Distribution Information Section Index Distributor: Contact Information: Contact Organization Primary: Contact Organization: Fairfax County GIS and Mapping Services Contact Position: Database Administrator Contact Address: Address Type: mailing and physical address Address: 12000 Government Center Pw. Suite 117 City: Fairfax State or Province: VA Postal Code: 22035 Country: USA Contact Voice Telephone: (703)-324-2712 Contact TDD/TTY Telephone: 711 Contact Facsimile Telephone: (703)-324-3937 Contact Electronic Mail Address: gis.helpq@fairfaxcounty.gov Hours of Service: Monday 8:00am - 4:15pm / Tuesday 9:00am - 4:15pm / Wednesday - Friday 8:00am - 4:15pm (EST) Resource Description: Fairfax County Public Facilities Distribution Liability: User must assume responsibility to determine the usability of this data for their purpose. A signed copy of the license agreement must be on file with the Fairfax County GIS and Mapping Services Office. Standard Order Process: Digital Form: Digital Transfer Information: Format Name: ArcInfo coverage Format Version Number: 8.0 File Decompression Technique: No compression Digital Form: Digital Transfer Information: Format Name: ArcView Shapefile Format Version Number: 8.0 File Decompression Technique: No compression Fees: Wall Map Data This data set includes over 30 layers of attributed vector map data that were derived primarily from the Fairfax County 1"= 2000' and 1"= 4000' Wall Map Series. The GIS Wall Map CD in Coverage format sells for $25. The GIS Wall Map CD in Shapefile format sells for $25. A hard copy of our wall maps are available at the Fairfax County Government Publications Center located at the Fairfax County Government Center Building - 12000 Government Center Pw.- Fairfax - VA. - Suite 156 - Phone # 703-324-2974 or 703-324-2975. Prices range from $1.50 to $15.00. Some of our hard copy maps are not for sale to the public or may be out of stock. Contact the Fairfax County Publication Center on the availabilty of which maps can be purchased. Ordering Instructions: CD data can be requested by mail, fax, or in person. Orders will not be processed until payment is received. Acceptable forms of payment include: cash, check, or money order ( credit cards are not accecpted). The order form and license agreement can be downloaded/printed from the Fairfax County GSI Web page (http://www.fairfaxcounty.gov/maps/forms.htm) and sent to GIS and Mapping Services-12000 Government Center Pw.-Suite 117-Fairfax-VA-22035-0010. Any questions about the GIS Wall Map CD should be directed to the GIS and Mapping Services @ (703)-324-2712. Turnaround: Five (5) working days. Metadata Reference Information Section Index Metadata Date: 3/4/2004 Metadata Review Date: 7/14/2004 Metadata Future Review Date: 1/1/2005 Metadata Contact: Contact Information: Contact Organization Primary: Contact Organization: Fairfax County GIS and Mapping Services Contact Position: Database Administrator Contact Address: Address Type: mailing and physical address Address: 12000 Government Center Pw. Suite 117 City: Fairfax State or Province: VA Postal Code: 22035 Country: USA Contact Voice Telephone: (703)-324-2712 Contact TDD/TTY Telephone: 711 Contact Facsimile Telephone: (703)-324-3937 Contact Electronic Mail Address: gis.helpq@fairfaxcounty.gov Hours of Service: Monday 8:00am - 4:15pm / Tuesday 9:00am - 4:15pm / Wednesday - Friday 8:00am - 4:15pm (EST) Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata Metadata Standard Version: FGDC-STD-06-1994 Metadata Time Convention: local time Metadata Security Information: Metadata Security Classification: Unclassified SMMS Metadata report generated 7/14/2004