USGS National Hydrography Dataset (NHD) Best Resolution for HU8-10300104 20140825 HU-8 Subbasin FileGDB 9.3.1

Resource lineage description

source

source description  Source Contribution: ImageSource Type digital data

representative resolution scale:

Scale denominator: 24000

source citation

Title Orthoimagery

publication  Date   2014-08-25

presentationForm  RASTER DIGITAL DATA OR DIGITAL ORTHORECTIFIED IMAGE OR NAIP DIGITAL ORTHO PHOTO IMAGE

other Citation Details  An orthorectified image is a layer in every product and is provided by the USDA-FSA-APFO from the National Agriculture Image Program (NAIP). This offers the USGS a nationally consistent image product, normally with a one meter resolution in natural color.

cited responsible party - originator

organisation Name  National Agriculture Image Program (NAIP) administered by the Aerial Photography Field Office (APFO) for the United States Department of Agriculture.

cited responsible party -

organisation Name  

Contact information

Linkage for online resource

URL: http://www.fsa.usda.gov/

source

source description  Source Contribution: Geographic feature namesSource Type digital data

representative resolution scale:

Scale denominator: 24000

source citation

Title Geographic Names Information System (GNIS)

publication  Date   2014-08-25

presentationForm  mapDigital

other Citation Details  The Geographic Names Information System (GNIS) is the Federal and national standard for geographic nomenclature. The U.S. Geological Survey developed the GNIS in support of the U.S. Board on Geographic Names as the official repository of domestic geographic names data, the official vehicle for geographic names use by all departments of the Federal Government, and the source for applying geographic names to Federal electronic and printed products.

cited responsible party - originator

organisation Name  U.S. Geological Survey, National Geospatial Technical Operations Center

cited responsible party -

organisation Name  

Contact information

Linkage for online resource

URL: http://geonames.usgs.gov/

source

source description  Source Contribution: Hydrography features and feature namesSource Type digital data

representative resolution scale:

Scale denominator: 24000

source citation

Title Hydrography

publication  Date   2014-08-25

presentationForm  mapDigital

other Citation Details  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. The high-resolution NHD was originally created using 1:24,000-scale data. State and Local Stewards are improving the data by incorporating local updates based on more current and more accurate source data. Water features in the real world are relatively dynamic and the differences at the time of data collection mean that water features may not register exactly to other layers. The hydrographic feature names contained in and displayed by the NHD are extracted and validated from the Geographic Names Information System (GNIS). Spatial objects may be filtered or generalized to achieve a 1:24,000-scale representation.

cited responsible party - originator

organisation Name  U.S. Geological Survey in cooperation with U.S. Environmental Protection Agency, USDA Forest Service, and other Federal, State and local partners. National Hydrography Dataset is a component of a comprehensive base geospatial data model.

cited responsible party -

organisation Name  

Contact information

Linkage for online resource

URL: http://nhd.usgs.gov/

cited responsible party -

organisation Name  

Contact information

Linkage for online resource

URL: http://nhd.usgs.gov/gnis.html

cited responsible party -

organisation Name  

Contact information

Linkage for online resource

URL: http://nhdgeo.usgs.gov/metadata/nhd_high.htm

source

source description  Source Contribution: Hydrography features and gaging stationsSource Type digital data

representative resolution scale:

Scale denominator: 24000

source citation

Title Gaging Stations

publication  Date   2014-08-25

presentationForm  mapDigital

other Citation Details  This dataset, termed "GAGES II", an acronym for Geospatial Attributes of Gages for Evaluating Streamflow, version II, provides geospatial data and classifications for 9,322 stream gages maintained by the U.S. Geological Survey (USGS). It is an update to the original GAGES in 2010. The GAGES II dataset consists of gages which have had either 20+ complete years (not necessarily continuous) of discharge record since 1950, or are currently active, as of water year 2009, and whose watersheds lie within the United States, including Alaska, Hawaii, and Puerto Rico. Only active stations, as identified by the GAGES II dataset, are symbolized.

cited responsible party - originator

organisation Name  U.S. Geological Survey, National Geospatial Technical Operations Center

cited responsible party -

organisation Name  

Contact information

Linkage for online resource

URL: http://water.usgs.gov/lookup/getspatial?gagesII_Sept2011

cited responsible party -

organisation Name  

Contact information

Linkage for online resource

URL: http://water.usgs.gov/GIS/metadata/usgswrd/XML/gagesII_Sept2011.xml

source

source description  Source Contribution: U.S. Geological SurveySource Type None

representative resolution scale:

Scale denominator: 24000

source citation

Title Watershed Boundary Dataset (WBD)

publication  Date   2014-08-25

presentationForm  mapDigital

other Citation Details  The Watershed Boundary Dataset (WBD) defines the areal extent of surface water drainage to a point, accounting for all land and surface areas. Watershed Boundaries are determined solely upon science-based hydrologic principles, not favoring any administrative boundaries or special projects, nor particular program or agency. The intent of defining Hydrologic Units (HU) for the Watershed Boundary Dataset is to establish a base-line drainage boundary framework, accounting for all land and surface areas. Hydrologic units are given a Hydrologic Unit Code (HUC). For example, a hydrologic region has a 2-digit HUC. A HUC describes where the unit is in the country and the level of the unit.

cited responsible party - originator

organisation Name  U.S. Geological Survey, National Geospatial Technical Operations Center

cited responsible party -

organisation Name  

Contact information

Linkage for online resource

URL: http://nhd.usgs.gov/wbd.html

AbsoluteExternalPositionalAccuracy

name Of Measure Horizontal Positional Accuracy Report

evaluation Method Description  This USGS map product is compiled to meet National Map Accuracy Standards (NMAS). NMAS horizontal accuracy requires that at least 90 percent of well-defined points tested are within 0.02 inch of the true position. In this product, the projection line, grids, and orthoimage are believed to meet NMAS. Positional accuracy of the other data layers is less controllable because of diversity of data sources, and may not meet NMAS.

AbsoluteExternalPositionalAccuracy

name Of Measure Vertical Positional Accuracy Report

evaluation Method Description  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.

Completeness Commission

evaluation Method Description  Each layer is extracted from the USGS national geospatial databases. Detailed capture conditions are provided for every feature type in the Standards for National Hydrography Dataset - High Resolution (USGS, 1999), available online through http://mapping.usgs.gov/standards/.

Completeness Omission

evaluation Method Description  Each layer is extracted from the USGS national geospatial databases. Detailed capture conditions are provided for every feature type in the Standards for National Hydrography Dataset - High Resolution (USGS, 1999), available online through http://mapping.usgs.gov/standards/.

ConceptualConsistency

measure Description  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.