ds402_hydrography

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator:
U.S. Geological Survey in cooperation with U.S. Environmental Protection Agency, U.S. Department of Aqriculture (USDA) Forest Service, and other Federal, State and local partners (see dataset specific metadata under Data_Set_Credit for details).
Publication_Date: See dataset specific metadata.
Publication_Time: Unknown
Title: ds402_hydrography
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Reston, Virginia
Publisher: U.S. Geological Survey
Online_Linkage:
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 were originally developed at 1:100,000-scale and exist 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 were 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 also are 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 the reach addresses, the upstream/downstream relations of these water-related entities--and any associated information--can be analyzed using software tools ranging from spreadsheets to geographic information systems (GIS). GIS also can be used to combine NHD-based network analysis with other data layers, such as soils, land use, and population to help understand and display 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.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date:
REQUIRED: The year (and optionally month, or month and day) for which the data set corresponds to the ground.
Currentness_Reference: See dataset specific metadata.
Status:
Progress: In work
Maintenance_and_Update_Frequency: Irregular
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -168.500000
East_Bounding_Coordinate: -64.549578
North_Bounding_Coordinate: 71.499607
South_Bounding_Coordinate: 17.673030
Keywords:
Theme:
Theme_Keyword_Thesaurus:
U.S. Department of the Interior, U.S. Geological Survey, 1999, Standards for National Hydrography Dataset (<http://nhd.usgs.gov>)
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
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: Virginia
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: 8AM-4PM 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://ask.usgs.gov/sils_index.html>
Data_Set_Credit: See dataset specific metadata.
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350
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 (<http://rockyweb.cr.usgs.gov/nmpstds/acrodocs/draft/dlg-f/nhd/NHD0799.PDF>) as of the date data 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 the lines are supposed to meet. No lines are duplicated. 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 (about 1.6 kilometers) were collected. Most streams that flow from a lake were collected regardless of length. Only definite channels were collected so not all swamp/marsh features have stream/rivers delineated through the marsh swamp. Lake/ponds having an area greater than 6 acres were collected. However, 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://nhd.usgs.gov>. 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 datasets are aligned if the map elements are within a 0.02-inch tolerance (at map scale). Features with like dimensionality (for example, features delineated with lines), with or without like characteristics, that are in 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 in the download. In addition, another table, the NHDSourceCitation, also can 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 square kilometer. (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 relation 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: NHD Flowline exported from geodatabase as a shapefile.
Process_Date: 20080730
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Shana Mashburn
Contact_Position: Hydrologist
Contact_Address:
Address_Type: mailing and physical address
Address: 202 NW 66th St., Bldg.#7
City: Oklahoma City
State_or_Province: Oklahoma
Postal_Code: 73116
Country: USA
Contact_Voice_Telephone: 405-810-4400
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: 34704
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Albers Conical Equal Area
Albers_Conical_Equal_Area:
Standard_Parallel: 29.500000
Standard_Parallel: 45.500000
Longitude_of_Central_Meridian: -96.000000
Latitude_of_Projection_Origin: 23.000000
False_Easting: 0.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000000
Ordinate_Resolution: 0.000000
Planar_Distance_Units: meters
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:
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: ds402_hydrography
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: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: ComID
Attribute:
Attribute_Label: FDate
Attribute:
Attribute_Label: Resolution
Attribute:
Attribute_Label: GNIS_ID
Attribute:
Attribute_Label: GNIS_Name
Attribute:
Attribute_Label: LengthKM
Attribute:
Attribute_Label: ReachCode
Attribute:
Attribute_Label: FlowDir
Attribute:
Attribute_Label: FType
Attribute:
Attribute_Label: FCode
Attribute:
Attribute_Label: FID
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: WBAreaComI
Attribute:
Attribute_Label: Shape_Leng
Attribute:
Attribute_Label: Enabled
Attribute:
Attribute_Label: FTypeName
Attribute_Definition: Name for FType
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Connector
Enumerated_Domain_Value_Definition:
A known, but nonspecific, connection between two nonadjacent network segments.
Enumerated_Domain_Value_Definition_Source:
<http://rockyweb.cr.usgs.gov/nmpstds/acrodocs/draft/dlg-f/nhd/NHD0799.PDF>
Enumerated_Domain:
Enumerated_Domain_Value: Canal Ditch
Enumerated_Domain_Value_Definition:
An artificial open waterway constructed to transport water, to irrigate or drain land, to connect two or more bodies of water, or to serve as a waterway for watercraft.
Enumerated_Domain_Value_Definition_Source:
<http://rockyweb.cr.usgs.gov/nmpstds/acrodocs/draft/dlg-f/nhd/NHD0799.PDF>
Enumerated_Domain:
Enumerated_Domain_Value: Pipeline
Enumerated_Domain_Value_Definition:
A closed conduit, with pumps, valves and control devices, for conveying fluids, gases, or finely divided solids.
Enumerated_Domain_Value_Definition_Source:
<http://rockyweb.cr.usgs.gov/nmpstds/acrodocs/draft/dlg-f/nhd/NHD0799.PDF>
Enumerated_Domain:
Enumerated_Domain_Value: StreamRiver
Enumerated_Domain_Value_Definition: A body of flowing water.
Enumerated_Domain_Value_Definition_Source:
<http://rockyweb.cr.usgs.gov/nmpstds/acrodocs/draft/dlg-f/nhd/NHD0799.PDF>
Enumerated_Domain:
Enumerated_Domain_Value: Artificial Path
Enumerated_Domain_Value_Definition:
An abstraction to facilitate hydrologic modeling through open water bodies and along coastal and Great Lakes shorelines and to act as a surrogate for lakes and other water bodies.
Enumerated_Domain_Value_Definition_Source:
<http://rockyweb.cr.usgs.gov/nmpstds/acrodocs/draft/dlg-f/nhd/NHD0799.PDF>
Attribute:
Attribute_Label: FCodeName
Attribute_Definition: Name for FCode
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Artificial Path
Enumerated_Domain_Value_Definition:
An abstraction to facilitate hydrologic modeling through open water bodies and along coastal and Great Lakes shorelines and to act as a surrogate for lakes and other water bodies.
Enumerated_Domain_Value_Definition_Source:
<http://rockyweb.cr.usgs.gov/nmpstds/acrodocs/draft/dlg-f/nhd/NHD0799.PDF>
Enumerated_Domain:
Enumerated_Domain_Value: Canal Ditch
Enumerated_Domain_Value_Definition:
An artificial open waterway constructed to transport water, to irrigate or drain land, to connect two or more bodies of water, or to serve as a waterway for watercraft.
Enumerated_Domain_Value_Definition_Source:
<http://rockyweb.cr.usgs.gov/nmpstds/acrodocs/draft/dlg-f/nhd/NHD0799.PDF>
Enumerated_Domain:
Enumerated_Domain_Value: Connector
Enumerated_Domain_Value_Definition:
A known, but nonspecific, connection between two nonadjacent network segments.
Enumerated_Domain_Value_Definition_Source:
<http://rockyweb.cr.usgs.gov/nmpstds/acrodocs/draft/dlg-f/nhd/NHD0799.PDF>
Enumerated_Domain:
Enumerated_Domain_Value:
Pipeline: Pipeline Type = Aquaduct; Relationship to Surface = At or Near
Enumerated_Domain_Value_Definition:
A structure designed to transport domestic or industrial water at or slightly above the surface.
Enumerated_Domain_Value_Definition_Source:
<http://rockyweb.cr.usgs.gov/nmpstds/acrodocs/draft/dlg-f/nhd/NHD0799.PDF>
Enumerated_Domain:
Enumerated_Domain_Value:
Pipeline: Pipeline Type = Aquaduct; Relationship to Surface = Underground
Enumerated_Domain_Value_Definition:
A structure designed to transport domestic or industrial water buried.
Enumerated_Domain_Value_Definition_Source:
<http://rockyweb.cr.usgs.gov/nmpstds/acrodocs/draft/dlg-f/nhd/NHD0799.PDF>
Enumerated_Domain:
Enumerated_Domain_Value:
Pipeline: Pipeline Type = General Case; Relationship to Surface = Underground
Enumerated_Domain_Value_Definition: Common use buried
Enumerated_Domain_Value_Definition_Source:
<http://rockyweb.cr.usgs.gov/nmpstds/acrodocs/draft/dlg-f/nhd/NHD0799.PDF>
Enumerated_Domain:
Enumerated_Domain_Value: Stream/River: Hydrographic Category = Intermittent
Enumerated_Domain_Value_Definition:
Contains water for only part of the year, but more than just after rainstorms and at snowmelt.
Enumerated_Domain_Value_Definition_Source:
<http://rockyweb.cr.usgs.gov/nmpstds/acrodocs/draft/dlg-f/nhd/NHD0799.PDF>
Enumerated_Domain:
Enumerated_Domain_Value: Stream/River: Hydrographic Category = Perennial
Enumerated_Domain_Value_Definition:
Contains water throughout the year, except for infrequent periods of severe drought
Enumerated_Domain_Value_Definition_Source:
<http://rockyweb.cr.usgs.gov/nmpstds/acrodocs/draft/dlg-f/nhd/NHD0799.PDF>
Detailed_Description:
Entity_Type:
Entity_Type_Label: NHDFlowlineToMeta
Attribute:
Attribute:
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 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 contain 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 (<http://rockyweb.cr.usgs.gov/nmpstds/acrodocs/draft/dlg-f/nhd/NHD0799.PDF>).
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: U.S. Geological Survey. The document is available online through <http://rockyweb.cr.usgs.gov/nmpstds/acrodocs/draft/dlg-f/nhd/NHD0799.PDF>. Information about tables and fields in the data ais 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: Virginia
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: 8AM-4PM 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: <http://ask.usgs.gov/sils_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: 50.008
Metadata_Reference_Information:
Metadata_Date: 20081216
Metadata_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: Virginia
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: 8AM-4PM 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: <http://ask.usgs.gov/sils_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
Generated by mp version 2.9.6 on Tue Dec 16 13:05:03 2008