HFlowLines

20140121 13215800 FALSE 20260423 15345100 20260423 15345100 1.0 Streams 002 11796380.446413 11933358.925409 3518821.193709 3647726.485767 1 NHDFlowlineToMeta Relationship Projected GCS_North_American_1983 Linear Unit: Foot_US (0.304801) <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.6.0'><WKT>PROJCS["NAD_1983_StatePlane_Virginia_South_FIPS_4502_Feet",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",11482916.66666666],PARAMETER["False_Northing",3280833.333333333],PARAMETER["Central_Meridian",-78.5],PARAMETER["Standard_Parallel_1",36.76666666666667],PARAMETER["Standard_Parallel_2",37.96666666666667],PARAMETER["Latitude_Of_Origin",36.33333333333334],UNIT["Foot_US",0.3048006096012192],AUTHORITY["EPSG",2284]]</WKT><XOrigin>-111140600</XOrigin><YOrigin>-91532100</YOrigin><XYScale>3048.0060960121928</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>0</MOrigin><MScale>99999.999999999985</MScale><XYTolerance>0.0032808333333333331</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>102747</WKID><LatestWKID>2284</LatestWKID></ProjectedCoordinateSystem> NAD_1983_StatePlane_Virginia_South_FIPS_4502_Feet FGDC CSDGM Metadata 150000000 5000 FGDC ESRI ArcCatalog 9.3.1.1850 en Surface water flow lines, generally representing the paths of streams and of water flow through larger water bodies such as wetlands, ponds, and rivers. This feature class aims to represent the network of water flow in Prince George County. Hydrographic flow lines in Prince George County, Virginia. U.S. Geological Survey in cooperation with U.S. Environmental Protection Agency, USDA Forest Service, and other Federal, State and local partners (see dataset specific metadata under Data_Set_Credit for details). See dataset specific metadata. HFlowLines NHDFlowline vector digital data withheld Unknown Reston, Virginia U.S. Geological Survey See dataset specific metadata. REQUIRED: The year (and optionally month, or month and day) for which the data set corresponds to the ground. In work Irregular -200 -56.8344239 143.165576 0 U.S. Department of the Interior, U.S. Geological Survey, 1999, Standards for National Hydrography Dataset (http://mapping.usgs.gov/standards/) FWHydrography Hydrography Stream / River Lake / Pond Canal / Ditch Reservoir Spring / Seep Swamp / Marsh Artificial Path Reach Code US U.S. Department of Commerce, 1977, Countries, dependencies, areas of special sovereignty, and their principal administrative divisions (Federal Information Processing Standards 10-3): Washington, D.C., National Institute of Standards and Technology. None. None. Acknowledgment of the originating agencies would be appreciated in products derived from these data. Personal GeoDatabase Feature Class Earth Science Information Center, U.S. Geological Survey 1 888 ASK USGS ask@usgs.gov 0800-1600 Eastern Time In addition to the address above there are other ESIC offices throughout the country. A full list of these offices is at URL: http://mapping.usgs.gov/esic/esic_index.html U.S. Geological Survey, National Hydrography Dataset for original line and attribute data. Esri ArcGIS 13.6.0.59527 Streams Prince George County, GIS Department 6602 Courts Drive Prince George VA 23875 gis@princegeorgecountyva.gov US P.O. Box 68 (804) 722-8702 Prince George County, GIS Department Hydrographic flow lines in Prince George County, Virginia. <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Surface water flow lines, generally representing the paths of streams and of water flow through larger water bodies such as wetlands, ponds, and rivers. </SPAN><SPAN>This feature class aims to represent the network of water flow in Prince George County.</SPAN></P></DIV></DIV></DIV> U.S. Geological Survey, National Hydrography Dataset for original line and attribute data. Virginia Prince George County Hydrography Surface water Flow line Stream River Reach Code Prince George County, GIS Department 6602 Courts Drive Prince George VA 23875 gis@princegeorgecountyva.gov US P.O. Box 68 (804) 722-8702 Prince George County, GIS Department 1 -77.426807 -76.950668 37.336117 36.976883 0.000000 0.000000 en FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time REQUIRED: The person responsible for the metadata information. Earth Science Information Center, U.S. Geological Survey mailing address Reston VA 20192

507 National Center

USA 1 888 ASK USGS. nhd@usgs.gov In addition to the address above there are other ESIC offices throughout the country. A full list of these offices is at URL: http://mapping.usgs.gov/esic/esic_index.html 20100520 ISO 19115 Geographic Information - Metadata DIS_ESRI1.0 dataset Downloadable Data ArcGIS Geodatabase 8.3 tar and uncompress Vector Simple FALSE 0 TRUE TRUE GCS_North_American_1983 North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 Explicit elevation coordinate included with horizontal coordinates 0.000025 National Geodetic Vertical Datum of 1929 meters GCS_North_American_1983 EPSG 5.3(9.0.0) 0 20260423 Statements of attribute accuracy are based on accuracy statements made for U.S. Geological Survey Digital Line Graph (DLG) data, which is estimated to be 98.5 percent. One or more of the following methods were used to test attribute accuracy: manual comparison of the source with hardcopy plots; symbolized display of the DLG on an interactive computer graphic system; selected attributes that could not be visually verified on plots or on screen were interactively queried and verified on screen. In addition, software validated feature types and characteristics against a master set of types and characteristics, checked that combinations of types and characteristics were valid, and that types and characteristics were valid for the delineation of the feature. Feature types, characteristics, and other attributes conform to the Standards for National Hydrography Dataset (USGS, 1999) as of the date they were loaded into the database. All names were validated against a current extract from the Geographic Names Information System (GNIS). The entry and identifier for the names match those in the GNIS. The association of each name to reaches has been interactively checked, however, operator error could in some cases apply a name to a wrong reach. This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be found in the NHDMetadata table. Points, nodes, lines, and areas conform to topological rules. Lines intersect only at nodes, and all nodes anchor the ends of lines. Lines do not overshoot or undershoot other lines where they are supposed to meet. There are no duplicate lines. Lines bound areas and lines identify the areas to the left and right of the lines. Gaps and overlaps among areas do not exist. All areas close. The completeness of the data reflects the content of the sources, which most often are the published USGS topographic quadrangle and/or the USDA Forest Service Primary Base Series (PBS) map. The USGS topographic quadrangle is usually supplemented by Digital Orthophoto Quadrangles (DOQs). Features found on the ground may have been eliminated or generalized on the source map because of scale and legibility constraints. In general, streams longer than one mile (approximately 1.6 kilometers) were collected. Most streams that flow from a lake were collected regardless of their length. Only definite channels were collected so not all swamp/marsh features have stream/rivers delineated through them. Lake/ponds having an area greater than 6 acres were collected. Note, however, that these general rules were applied unevenly among maps during compilation. Reaches codes are defined on all features of type stream/river, canal/ditch, artificial path, coastline, and connector. Waterbody reach codes are defined on all lake/pond and most reservoir features. Names were applied from the GNIS database. Detailed capture conditions are provided for every feature type in the Standards for National Hydrography Dataset available online through http://mapping.usgs.gov/standards/. This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be found in the NHDMetadata table. Statements of horizontal positional accuracy are based on accuracy statements made for U.S. Geological Survey topographic quadrangle maps. These maps were compiled to meet National Map Accuracy Standards. For horizontal accuracy, this standard is met if at least 90 percent of points tested are within 0.02 inch (at map scale) of the true position. Additional offsets to positions may have been introduced where feature density is high to improve the legibility of map symbols. In addition, the digitizing of maps is estimated to contain a horizontal positional error of less than or equal to 0.003 inch standard error (at map scale) in the two component directions relative to the source maps. Visual comparison between the map graphic (including digital scans of the graphic) and plots or digital displays of points, lines, and areas, is used as control to assess the positional accuracy of digital data. Digital map elements along the adjoining edges of data sets are aligned if they are within a 0.02 inch tolerance (at map scale). Features with like dimensionality (for example, features that all are delineated with lines), with or without like characteristics, that are within the tolerance are aligned by moving the features equally to a common point. Features outside the tolerance are not moved; instead, a feature of type connector is added to join the features. This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be found in the NHDMetadata table. Statements of vertical positional accuracy for elevation of water surfaces are based on accuracy statements made for U.S. Geological Survey topographic quadrangle maps. These maps were compiled to meet National Map Accuracy Standards. For vertical accuracy, this standard is met if at least 90 percent of well-defined points tested are within one-half contour interval of the correct value. Elevations of water surface printed on the published map meet this standard; the contour intervals of the maps vary. These elevations were transcribed into the digital data; the accuracy of this transcription was checked by visual comparison between the data and the map. This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be found in the NHDMetadata table. The processes used to create and maintain high-resolution NHD data can be found in the table called "NHDMetadata". Because NHD data can be downloaded using several user-defined areas, the process descriptions can vary for each download. The NHDMetadata table contains a list of all the process descriptions that apply to a particular download. These process descriptions are linked using the DuuID to the NHDFeatureToMetadata table which contains the com_ids of all the features within the download. In addition, another table, the NHDSourceCitation, can also be linked through the DuuID to determine the sources used to create or update NHD data. Unknown Dataset copied. withheld 20071130 14444000 Metadata imported. withheld 20100421 16520900 Dataset copied. withheld 20100520 16121900 Dataset copied. withheld 20120221 13582500 The original data was acquired from the NHDFlowline feature class within the U.S. Geological Survey's National Hydrography Dataset state-wide geodatabase for Virginia on November 5th, 2013 and then updated with previously improved stream lines. Not yet officially published as of Tuesday, February 4th, 2014. Retrieved U.S. Geological Survey's National Hydrography Dataset (NHD) state-wide geodatabase for Virginia on November 5th, 2013. 2013-11-03T09:53:47 Prince George County, GIS Department 6602 Courts Drive Prince George VA 23875 gis@princegeorgecountyva.gov US P.O. Box 68 (804) 722-8702 Prince George County, GIS Department Reprojected NHDFlowline to State Plane VA South (NAD83, U.S. Feet). 2014-01-14T15:13:42 Prince George County, GIS Department 6602 Courts Drive Prince George VA 23875 gis@princegeorgecountyva.gov US P.O. Box 68 (804) 722-8702 Prince George County, GIS Department From the NHDFlowline feature class, extracted features within ~0.5 miles of Prince George County and Hopewell required to model paths of water flow through the Prince George County area as-well-as all connections in-from and out-to the original feature class. Defined new fields “FName”, “FNameAlt”, (int) “GNIS_ID”, “FType”, “FPersistence”, “FSource”, and “FEditDate”. 2014-01-21T15:06:04 Prince George County, GIS Department 6602 Courts Drive Prince George VA 23875 gis@princegeorgecountyva.gov US P.O. Box 68 (804) 722-8702 Prince George County, GIS Department Copied contents of existing “FDate” field to new “FEditDate” field. Copied contents of existing “GNIS_Name” field to new “FName” field. Copied text contents of existing “GNIS_ID” field to new “GNIS_ID” integer field. Set all values of “FSource” to “NHD 2013.11.05”. Updated “FType” and “FPersistence” based on existing “FCode” values. Via joins with NHD classes “NHDArea” and “NHDWaterbody”, updated unset “FType” and “FPersistence” values. Exported feature class as “HFlowLines”, retaining the original fields “Permanent_Identifier”, “ReachCode”, and “WBArea_Permanent_Identifier”. 2014-01-22T15:10:19 Prince George County, GIS Department 6602 Courts Drive Prince George VA 23875 gis@princegeorgecountyva.gov US P.O. Box 68 (804) 722-8702 Prince George County, GIS Department Selectively incorporated prior stream geometry edits into this new line class. New hydrographic flow lines feature class exported and made available. Enabled editor tracking with “FEditDate” as the edit date field. 2014-01-31T11:44:05 Prince George County, GIS Department 6602 Courts Drive Prince George VA 23875 gis@princegeorgecountyva.gov US P.O. Box 68 (804) 722-8702 Prince George County, GIS Department Updated "FSource" to specify imagery datasets (ex: VBMP 2013, Pictometry 2013) instead of the more general "Aerial 2013". Valid "FSource" values were refined both (a) to distinguish between datasets and (b) to include related reference data (ex: breaklines, contours). 2014-10-06T19:08:00 Prince George County, GIS Department 6602 Courts Drive Prince George VA 23875 gis@princegeorgecountyva.gov US P.O. Box 68 (804) 722-8702 Prince George County, GIS Department False Prince George County, GIS Department Prince George County, GIS Department 6602 Courts Drive Prince George VA 23875 gis@princegeorgecountyva.gov US P.O. Box 68 (804) 722-8702 Prince George County, GIS Department Enterprise Geodatabase Feature Class Streams Feature Class 0 Hydrographic flow lines GIS Department, Prince George County, Virginia OBJECTID OBJECTID OID 4 10 0 Internal feature number. Esri Sequential unique whole numbers that are automatically generated. Shape Shape Geometry 8 0 0 Feature geometry. Esri Coordinates defining the features. Permanent_Identifier Permanent_Identifier String 40 0 0 Retained from NHD. 40-char GUID value that uniquely identifies the occurrence of each feature. U.S. Geological Survey ReachCode ReachCode String 14 0 0 Retained from NHD. Unique identifier composed of two parts. The first eight digits is the subbasin code as defined by FIPS 103. The next six digits are randomly assigned, sequential numbers that are unique within a Cataloging Unit. U.S. Geological Survey WBArea_Permanent_Identifier WBArea_Permanent_Identifier String 40 0 0 Retained from NHD. Permanent_Identifier of the waterbody through which the Flowline (Artificial Path) flows. U.S. Geological Survey FName Feature Name String 120 0 0 The (most) correct name, if one exists, for this feature. May not match Geographic Names Information System (GNIS) name. GIS Department, Prince George County, Virginia FNameAlt Feature Names, Alternate String 255 0 0 Comma-separated alternate or former names for this feature. GIS Department, Prince George County, Virginia GNIS_ID GNIS Feature ID Integer 4 10 0 Numeric identifier, up to 10 digits in length, within the Geographic Names Information System (GNIS). GIS Department, Prince George County, Virginia FType Feature Type SmallInteger 2 5 0 Feature type, encoded as an integer (HFlowLinesType domain). GIS Department, Prince George County, Virginia 0 Unknown/Uninitialized GIS Department, Prince George County, Virginia 1 Surface: Relatively discrete surface water flow lines (ex: streams). GIS Department, Prince George County, Virginia 2 Sub-surface: Underground passage of surface water. May be open to surface at end points. GIS Department, Prince George County, Virginia 3 Closed System: Closed conduit, isolated from surface (ex: pipeline). GIS Department, Prince George County, Virginia 4 Abstract: Abstraction of water flow through larger water bodies, such as ponds and rivers. GIS Department, Prince George County, Virginia FPersistence Flow Persistence SmallInteger 2 5 0 Persistence of water flow in a typical year (HFlowLinesPersistence domain). NB: Any value for Closed System and Abstract flowlines may be pointless and best ignored. GIS Department, Prince George County, Virginia 0 Uninitialized GIS Department, Prince George County, Virginia 1 Perennial: Water is always present. GIS Department, Prince George County, Virginia 2 Intermittent: Water may be absent at certain times. GIS Department, Prince George County, Virginia 3 Ephemeral: Water may only be temporarily present and flowing (ex: storm water channel). This value can be used to mark certain storm water features, especially if they’re of significant size or connect two features of greater significance. However, this feature class does not attempt to be a comprehensive catalog of storm water features. GIS Department, Prince George County, Virginia FSource Feature Source String 24 0 0 Description of the primary or most recent source for this feature’s shape. Examples: "NHD 2013.11.05": U.S. Geological Survey, National Hydrography Dataset and Watershed Boundary Dataset, accessed on YYYY.MM.DD "VBMP 2007": VGIN Virginia Base Map Program aerial orthoimagery and related data for year YYYY. "Pictometry 2013": Prince George County contracted aerial oblique and orthoimagery for year 2013. "Aerial 2007": Aerial imagery of unspecified source for year YYYY. "INST070004297 2007", "PB25-163A_1 1963", "DB478-329 1998", "SHPB10-116 2011", "T12C(01)0B-0CC-0 19XX", "UINST070001572 2007": Surveys such as Instrument, Plat Book, Deed Book, State Highway Plat Book, and other tentative(T) or unrecorded/unknown(U) surveys by an affected tax parcel PIN or related legal document. "Contours 2007": Prince George County contour data for year YYYY. GIS Department, Prince George County, Virginia See examples in field definition. FEditDate Feature Edit Date Date 8 0 0 The date this feature was last edited (UTC). Values prior to 2014 were imported from the "FDate" field within the source feature class, NHDFlowline. GIS Department, Prince George County, Virginia Shape.STLength() Shape.STLength() Double 0 0 0