Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey, National Geospatial Program Publication_Date: 20190427 Title: New Hampshire National Hydrography Dataset 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 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 directions, 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. The New Hampshire NHD, or NHNHD, is an extract from the national dataset. The NH Geological Survey at the NH Department of Environmental Services serves as the custodian for the NH features in the NHD. 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: This data comprises hydrological data, including flow lines, water bodies and water features. Data were downloaded in June, 2019 from the USGS National Map. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1988 Ending_Date: 2012 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: Irregular Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -73.058 East_Bounding_Coordinate: -69.791 North_Bounding_Coordinate: 45.431 South_Bounding_Coordinate: 42.078 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Categories Theme_Keyword: inlandWaters Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Rivers Theme_Keyword: Lakes Theme_Keyword: Dams Theme_Keyword: HUC Theme_Keyword: Subwatershed Theme_Keyword: Watershed Boundary Dataset Theme_Keyword: Watershed Boundaries Theme_Keyword: Boundaries Theme_Keyword: Hydrologic Unit Code Theme_Keyword: Basin Theme_Keyword: WBD Theme_Keyword: Region Theme_Keyword: Hydrologic Units Theme_Keyword: Topographic Theme_Keyword: Boundary Theme_Keyword: HU10 Theme_Keyword: HU12 Theme_Keyword: HU14 Theme_Keyword: HU16 Theme_Keyword: HU2 Theme_Keyword: HU4 Theme_Keyword: HU6 Theme_Keyword: HU8 Theme_Keyword: Area of Complex Channels Theme_Keyword: Area to be Submerged Theme_Keyword: Artificial Path Theme_Keyword: Bay/Inlet Theme_Keyword: Bridge Theme_Keyword: Canal/Ditch Theme_Keyword: Coastline Theme_Keyword: Connector Theme_Keyword: Dam/Weir Theme_Keyword: Estuary Theme_Keyword: Flow Direction Network Theme_Keyword: Flume Theme_Keyword: ForeShore Theme_Keyword: Gaging Station Theme_Keyword: Gate Theme_Keyword: Hazard Zone Theme_Keyword: Ice Mass Theme_Keyword: Inundation Area Theme_Keyword: Levee Theme_Keyword: Lock Theme_Keyword: Marsh Theme_Keyword: Nonearthen Shore Theme_Keyword: Orthoimage Theme_Keyword: Playa Theme_Keyword: Pond Theme_Keyword: Rapids Theme_Keyword: Reach Code Theme_Keyword: Reach Theme_Keyword: Reef Theme_Keyword: Reservoir Theme_Keyword: Rock Theme_Keyword: Sea/Ocean Theme_Keyword: Sink/Rise Theme_Keyword: Sounding Datum Line Theme_Keyword: Special Use Zone Limit Theme_Keyword: Special Use Zone Theme_Keyword: Spillway Theme_Keyword: Stream/River Theme_Keyword: Stream Theme_Keyword: Submerged Stream Theme_Keyword: Surface Water Systems Theme_Keyword: Swamp Theme_Keyword: Tunnel Theme_Keyword: Underground Conduit Theme_Keyword: Wall Theme_Keyword: Wash Theme_Keyword: Water Intake Outflow Theme_Keyword: Waterfall Theme_Keyword: Well Theme_Keyword: Administrative Watershed Units Theme_Keyword: Sub-region Theme_Keyword: Watershed Theme_Keyword: Sub-basin Theme_Keyword: Watershed Boundary Dataset Theme_Keyword: WBD Theme_Keyword: Hydrography Theme_Keyword: Hydrographic Theme_Keyword: Line Theme_Keyword: Point Theme_Keyword: PointEvent Theme_Keyword: Subbasin Theme_Keyword: Subregion Theme_Keyword: Boundaries Theme_Keyword: Basin Theme_Keyword: Drainage Areas for Surface Water Theme_Keyword: Drainage Systems and Characteristics Theme_Keyword: National Hydrography Dataset (NHD) Best Resolution Theme_Keyword: State Theme_Keyword: FileGDB 10.1 Place: Place_Keyword_Thesaurus: Geographic Names Information System Place_Keyword: US Place_Keyword: United States Place: Place_Keyword_Thesaurus: Geographic Names Information System Place_Keyword: US Place_Keyword: NH Place_Keyword: New Hampshire Place_Keyword: Belknap County Place_Keyword: Carroll County Place_Keyword: Cheshire County Place_Keyword: Coos County Place_Keyword: Grafton County Place_Keyword: Hillsborough County Place_Keyword: Merrimack County Place_Keyword: Rockingham County Place_Keyword: Strafford County Place_Keyword: Sullivan County Access_Constraints: None. Use_Constraints: None. However, users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. Acknowledgment of the U.S. Geological Survey would be appreciated for products derived from these data. 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. 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. Reach 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/. 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. 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. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: US 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. Publication_Date: 20190427 Title: Hydrography Geospatial_Data_Presentation_Form: vector digital data 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. Online_Linkage: http://nhd.usgs.gov/ Online_Linkage: http://nhd.usgs.gov/gnis.html Online_Linkage: http://nhdgeo.usgs.gov/metadata/nhd_high.htm Source_Scale_Denominator: 24000 Type_of_Source_Media: digital data Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20100820 Ending_Date: 20100820 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Hydrography Source_Contribution: Hydrography features and feature names Source_Information: Source_Citation: Citation_Information: Originator: Global Land Ice Measurements from Space initiative (GLIMS) Publication_Date: 20190427 Title: Gaging Stations Geospatial_Data_Presentation_Form: vector digital data 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 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. Online_Linkage: http:water.usgs.gov/lookup/getspatial?gagesII_Sept2011 Online_Linkage: http:water.usgs.gov/GIS/metadata/usgswrd/XML/gagesII_Sept2011.xml Source_Scale_Denominator: 24000 Type_of_Source_Media: digital data Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: Ending_Date: Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Hydrography - Gaging Stations Source_Contribution: Hydrography features and gaging stations Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey, National Geospatial Technical Operations Center Publication_Date: 20190427 Title: Watershed Boundary Dataset (WBD) Geospatial_Data_Presentation_Form: vector digital data 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. Online_Linkage: http://nhd.usgs.gov/wbd.html Source_Scale_Denominator: 24000 Type_of_Source_Media: digital data Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19720101 Ending_Date: 20120101 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Watershed Boundary Dataset Source_Contribution: U.S. Geological Survey Process_Step: Process_Description: New reaches were assigned reach code values that are sequentially ordered to 2-D and then 1-D reaches. New high-res reach codes are larger than any existing med-res reach code in the associated Catalog Unit. Additional Geographic Names that exist in the Geographic Names Information System (GNIS) were added to reaches in the high-res dataset. Names for the high-res drainage network were interactively transferred from the vector GNIS coverage. Additional GNIS names for point and water body features were also added. Process_Date: 20190427 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.00001 Longitude_Resolution: 0.00001 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: 298.257221 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: All feature types, characteristics, and values are in U.S. Geological Survey, 1999, Standards for National Hydrography Dataset: Reston, Virginia, U.S. Geological Survey. The document is available online through http://nationalmap.gov/standards/nhdstds.html. Information about tables and fields in the data are available from the user documentation for the National Hydrography Dataset available online through http://nhd.usgs.gov/documentation.html. Entity_and_Attribute_Detail_Citation: http://nhd.usgs.gov/userguide.html Entity_and_Attribute_Detail_Citation: http://nhd.usgs.gov/documentation.html Entity_and_Attribute_Detail_Citation: http://nationalmap.gov/standards/nhdstds.html Entity_and_Attribute_Detail_Citation: http://nhd.usgs.gov/NHDDataDictionary_model2.0.pdf Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Earth Systems Research Center, University of New Hampshire Contact_Person: GRANIT Database Manager Contact_Position: GRANIT Database Manager Contact_Address: Address_Type: mailing and physical address Address: Morse Hall, University of New Hampshire City: Durham State_or_Province: NH Postal_Code: 03824 Country: US Contact_Voice_Telephone: 603-862-1792 Contact_Facsimile_Telephone: 603-862-0188 Contact_Electronic_Mail_Address: granit@unh.edu Hours_of_Service: 8:30AM-5PM. EST Resource_Description: Downloadable Data Distribution_Liability: Digital data in NH GRANIT represent the efforts of the contributing agencies to record information from the cited source materials. Earth Systems Research Center, under contract to the NH Office of Strategic Initiatives, and in consultation with cooperating agencies, maintains a continuing program to identify and correct errors in these data. OSI, ESRC, and the cooperating agencies make no claim as to the validity or reliability or to any implied uses of these data. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: FileGDB Transfer_Size: 281845609 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: URL:http://www.granit.unh.edu Fees: None Technical_Prerequisites: None. Metadata_Reference_Information: Metadata_Date: 20190427 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, National Geospatial Technical Operations Center Contact_Address: Address_Type: mailing and physical address Address: 1400 Independence Road City: Rolla State_or_Province: MO Postal_Code: 65401 Country: US Contact_Address: Address_Type: mailing and physical address Address: Box 25046 Denver Federal Center City: Lakewood State_or_Province: CO Postal_Code: 80225 Country: US Contact_Voice_Telephone: 603-862-1792 Contact_Electronic_Mail_Address: http://www.usgs.gov/ask/ Hours_of_Service: Monday through Friday 8:00 AM to 4:00 PM Contact_Instructions: Metadata information can also be obtained through online services using The National Map Viewer, at http://nationalmap.usgs.gov or EarthExplorer, at http://earthexplorer.usgs.gov or Ask USGS at http://www.usgs.gov/ask 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