Full Metadata

National Hydrography Dataset (NHD) - High resolution: flowline features

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Distributor 1
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: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).

Publication_Date:See subbasin-specific metadata at 'nhdgeo.usgs.gov'. This overall statewide dataset downloaded and compiled in October 2005.

Publication_Time:Unknown

Title:

National Hydrography Dataset (NHD) - High resolution: flowline features

Geospatial_Data_Presentation_Form:vector digital data

Publication_Information:

Publication_Place:Reston, Virginia

Publisher:U.S. Geological Survey

Other_Citation_Details:

The NHD flowline dataset contains routes that make up a linear surface water drainage network. This NHD flowline dataset was compiled for Pennsylvania from subregions 0204, 0205, 0206, 0207, 0412, 0413, 0501, 0502, and 0503. Subregion datasets were extracted as shapefiles from geodatabase in ArcCatalog, and merged in Arcview 3.3. Current status of the NHD subbasins including availability, partners, POC's, etc., is available from the NHD Geodatabase web site (nhdgeo.usgs.gov) as well as the Status Graphics web site (statgraph.cr.usgs.gov).

Online_Linkage: http://nhd.usgs.gov

Description:

Abstract:

The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.)  Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water bodies. Reaches are also defined on waterbodies and the approximate shorelines of the Great Lakes, the Atlantic and Pacific Oceans and the Gulf of Mexico. The NHD also incorporates the National Spatial Data Infrastructure framework criteria established by the Federal Geographic Data Committee.

Purpose:

The NHD is a national framework for assigning reach addresses to water-related entities, such as industrial discharges, drinking water supplies, fish habitat areas, wild and scenic rivers. Reach addresses establish the locations of these entities relative to one another within the NHD surface water drainage network, much like addresses on streets. Once linked to the NHD by their reach addresses, the upstream/downstream relationships of these water-related entities--and any associated information about them--can be analyzed using software tools ranging from spreadsheets to geographic information systems (GIS). GIS can also be used to combine NHD-based network analysis with other data layers, such as soils, land use and population, to help understand and display their respective effects upon one another. Furthermore, because the NHD provides a nationally consistent framework for addressing and analysis, water-related information linked to reach addresses by one organization (national, state, local) can be shared with other organizations and easily integrated into many different types of applications to the benefit of all.

Supplemental_Information:

NOTE:  Z -values have been removed from this dataset. To download the same data with Z -values see  ftp://www.pasda.psu.edu/pub/pasda/nhd

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date:2001

Ending_Date:2004

Currentness_Reference:

See dataset specific metadata.

Status:

Progress:In work

Maintenance_and_Update_Frequency:Irregular

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -82.820100

East_Bounding_Coordinate: -74.029870

North_Bounding_Coordinate: 43.376570

South_Bounding_Coordinate: 37.843240

Keywords:

Theme:

Theme_Keyword_Thesaurus:ISO 19115 Topic Categories

Theme_Keyword:FWHYDROGRAPHY

Theme_Keyword:Hydrography

Theme_Keyword:Stream / River

Theme_Keyword:Lake / Pond

Theme_Keyword:Canal / Ditch

Theme_Keyword:Reservoir

Theme_Keyword:Spring / Seep

Theme_Keyword:Swamp / Marsh

Theme_Keyword:Artificial Path

Theme_Keyword:Reach Code

Theme_Keyword:Inland Waters

Place:

Place_Keyword_Thesaurus: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.

Place_Keyword:US

Access_Constraints:None

Use_Constraints:

None.  Acknowledgment of the originating agencies would
be appreciated in products derived from these data.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:Earth Science Information Center, U.S. Geological Survey

Contact_Address:

Address_Type:mailing address

Address:

507 National Center

City:Reston

State_or_Province:VA

Postal_Code:20192

Country:USA

Contact_Voice_Telephone:1 888 ASK USGS

Contact_Voice_Telephone:1 888 275 8747

Contact_Electronic_Mail_Address:ask@usgs.gov

Hours_of_Service:0800-1600 Eastern Time

Contact Instructions:

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

Data_Set_Credit:

See dataset specific metadata.

Native_Data_Set_Environment:

Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 8.3.0.800

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

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.

Logical_Consistency_Report:

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.

Completeness_Report:

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.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

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.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

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.

Lineage:

Process_Step:

Process_Description:

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.

Process_Date:Unknown

Process_Step:

Process_Description:

Converted NHD data to geodatabase format.  Conversion included assignment of FCodes, FDate, and Resolution attribute values; assignment of reach codes to associated features; replacement of branched reaches with linear reaches; merge of area features with identical classification that adjoin or overlap; split of large area features that exceed 100/25 sq. km. (depending on feature type) at subbasin boundaries; reduction of feature classes, feature types, and attribution to simplify data; merge of network flow features at vertical relationship locations; conversion of artificial paths along coastline to coastline feature type; addition of M coordinates and values to network flow features; addition of Z coordinates, but not values, to all feature geometry; addition of value added attributes; switch to primary flow navigation by network features (NHDFlowline, route.drain) in place of reach features; and elimination of metadata boundaries.

Process_Date:2004

Process_Step:

Process_Description:

See dataset specific metadata.

Process_Step:

Process_Description:

Metadata imported.

Source_Used_Citation_Abbreviation:

D:\NHD_Update\metadata_nhd_highres.xml

Process_Step:

Process_Description:

Metadata imported.

Source_Used_Citation_Abbreviation:

D:\NHD_Update\Shapefiles\nhdwaterbody_pa.shp.xml

Process_Step:

Process_Description:

Metadata imported.

Source_Used_Citation_Abbreviation:

D:\NHD_Update\Shapefiles\nhdflowline-hr_pa.shp.xml

Process_Step:

Process_Description:

Dataset copied.

Source_Used_Citation_Abbreviation:

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method:Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type:String

Point_and_Vector_Object_Count:702977

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution:0.000010

Longitude_Resolution:0.000010

Geographic_Coordinate_Units:Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name:North American Datum of 1983

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_Datum_Name:National Geodetic Vertical Datum of 1929

Altitude_Resolution:1.000000

Altitude_Distance_Units:meters

Altitude_Encoding_Method:Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: SDE.ADD1.PaNHDStreamsHiRes

Attribute:

Attribute_Label:OBJECTID

Attribute_Definition:

Internal feature number.

Attribute_Definition_Source:

ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label:GNIS_ID

Attribute_Definition:

Feature geometry.

Attribute_Definition_Source:

ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Coordinates defining the features.

Attribute:

Attribute_Label:FDATE

Attribute:

Attribute_Label:GNIS_Name

Attribute:

Attribute_Label:ReachCode

Attribute:

Attribute_Label:Shape

Attribute_Definition:

Feature geometry.

Attribute_Definition_Source:

ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Coordinates defining the features.

Attribute:

Attribute_Label:LENGTHKM

Attribute:

Attribute_Label:REACHCODE

Attribute:

Attribute_Label:FLOWDIR

Attribute:

Attribute_Label:WBAREACOMI

Attribute:

Attribute_Label:FTYPE

Attribute:

Attribute_Label:FType

Attribute:

Attribute_Label:SHAPE_LENG

Attribute:

Attribute_Label:ENABLED

Attribute:

Attribute_Label:FCode

Attribute_Definition:

Feature geometry.

Attribute_Definition_Source:

ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Coordinates defining the features.

Attribute:

Attribute_Label:SHAPE..Length()

Attribute:

Attribute_Label:REACHCODE

Attribute:

Attribute_Label:FTYPE

Attribute:

Attribute_Label:FCODE

Attribute:

Attribute_Label:ComID

Attribute:

Attribute_Label:FDate

Attribute:

Attribute_Label:Resolution

Attribute:

Attribute_Label:SHAPE_LENG

Attribute:

Attribute_Label:LENGTHKM

Attribute:

Attribute_Label:FLOWDIR

Attribute:

Attribute_Label:WBAREACOMI

Attribute:

Attribute_Label:Enabled

Overview_Description:

Entity_and_Attribute_Overview:

The National Hydrography Dataset is a comprehensive set of digital spatial data that encodes information about naturally occurring and constructed bodies of water, paths through which water flows, and related entities.  The information encoded about features includes a feature date, classification by type, other characteristics, a unique common identifier, the feature length or area, and (rarely) elevation of the surface of water pools and a description of the stage of the elevation.  For reaches, encoded information includes a reach code.  Names and their identifiers in the Geographic Names Information System, are assigned to most feature types.  The direction of flow is encoded for networked features.  The data also contains relations that encode metadata, and information that supports the exchange of future updates and improvements to the data.  The names and  definitions of all feature types, characteristics, and values are in the Standards for National Hydrography Dataset:  Reston, Virginia, U.S. Geological Survey, 1999.  The document is available online through http://mapping.usgs.gov/standards/.

Entity_and_Attribute_Detail_Citation:

The names and definitions of all feature types, characteristics, and values are in U.S. Geological Survey, 1999, Standards for National Hydrography Dataset High Resolution:  Reston, Virginia, U.S. Geological Survey.  The document is available online through http://mapping.usgs.gov/standards/.  Information about tables and fields in the data are available from the user documentation for the National Hydrography Dataset at http://nhd.usgs.gov.  The National Map - Hydrography Fact Sheet is also available at: http://erg.usgs.gov/isb/pubs/factsheets/fs06002.html.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:Earth Science Information Center, U.S. Geological Survey

Contact_Address:

Address_Type:mailing address

Address:

507 National Center

City:Reston

State_or_Province:VA

Postal_Code:20192

Country:USA

Contact_Voice_Telephone:1 888 ASK USGS

Contact_Voice_Telephone:1 888 275 8747

Contact_Electronic_Mail_Address:ask@usgs.gov

Hours_of_Service:0800-1600 Eastern Time

Contact Instructions:

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

Resource_Description:Downloadable Data

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name:ArcGIS Geodatabase

Format_Version_Number:8.3

File_Decompression_Technique:tar and uncompress

Transfer_Size:474.886

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:Pennsylvania Spatial Data Access

Contact_Address:

Address_Type:mailing and physical address

Address:

115 Land and Water Building, Penn State University

City:University Park

State_or_Province:PA

Postal_Code:16802

Country:USA

Contact_Voice_Telephone:(814) 865 - 8792

Contact_Electronic_Mail_Address:pasda@psu.edu

Distribution_Liability:

The USER shall indemnify, save harmless, and, if requested, defend those parties involved with the development and distribution of this data, their officers, agents, and employees from and against any suits, claims, or actions for injury, death, or property damage arising out of the use of or any defect in the FILES or any accompanying documentation. Those parties involved with the development and distribution excluded any and all implied warranties, including warranties or merchantability and fitness for a particular purpose and makes no warranty or representation, either express or implied, with respect to the FILES or accompanying documentation, including its quality, performance, merchantability, or fitness for a particular purpose. The FILES and documentation are provided "as is" and the USER assumes the entire risk as to its quality and performance. Those parties involved with the development and distribution of this data will not be liable for any direct, indirect, special, incidental, or consequential damages arising out of the use or inability to use the FILES or any accompanying documentation.

Metadata_Reference_Information:

Metadata_Date:20051114

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:Earth Science Information Center, U.S. Geological Survey

Contact_Person:REQUIRED: The person responsible for the metadata information.

Contact_Address:

Address_Type:mailing address

Address:

507 National Center

City:Reston

State_or_Province:VA

Postal_Code:20192

Country:USA

Contact_Voice_Telephone:1 888 ASK USGS

Contact_Voice_Telephone:1 888 275 8747

Contact_Electronic_Mail_Address:nhd@usgs.gov

Hours_of_Service:0800-1600 Eastern Time

Contact Instructions:

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

Metadata_Standard_Name:FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version:FGDC-STD-001-1998

Metadata_Time_Convention:local time

Metadata_Extensions:

Online_Linkage: http://www.esri.com/metadata/esriprof80.html

Profile_Name:ESRI Metadata Profile

Metadata_Extensions:

Online_Linkage: http://www.esri.com/metadata/esriprof80.html

Profile_Name:ESRI Metadata Profile