NATIONAL HYDROGRAPHY DATASET-REACHES

Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator:
United States Geological Survey, The United States Environmental Protection Agency
Publication_Date: 20020626
Title: NATIONAL HYDROGRAPHY DATASET-REACHES
Geospatial_Data_Presentation_Form: Shapefile
Other_Citation_Details: State of Florida
Online_Linkage: <http://nhd.usgs.gov/>
Description:
Abstract:
This dataset contains the spatial extent of reaches for the National Hydrography Dataset (NHD) in the State of Florida. The lines are features that comprise the surface water drainage network and coastline-stream/river, canal/ditch, artificial path,connector, and pipeline. The lines representing network features, through which water flows in a known direction, are oriented in the direction of flow. The lines representing coastlines are usually oriented so that the sea or ocean is to the right.
Purpose:
For research of the National Hydrography Dataset for the State of Florida
Supplemental_Information: LINE
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20020626
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -82.663385
East_Bounding_Coordinate: -82.040266
North_Bounding_Coordinate: 29.939313
South_Bounding_Coordinate: 29.422649
Keywords:
Theme:
Theme_Keyword_Thesaurus: NONE
Theme_Keyword: Hydrography
Theme_Keyword: Reaches
Theme_Keyword: USGS
Access_Constraints: NONE
Use_Constraints: NONE
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Florida Geographic Data Library (FGDL)
Contact_Address:
Address_Type: mailing address
Address: 431 Architecture PO Box 115706
City: Gainesville
State_or_Province: Florida
Postal_Code: 32611-5706
Contact_Electronic_Mail_Address:
Web site: <http://www.fgdl.org>
Contact_Electronic_Mail_Address:
Technical Support: <http://www.fgdl.org/fgdlfeed.html>
Contact_Electronic_Mail_Address:
For FGDL Software: <http://www.fgdl.org/software.html>
Contact_Electronic_Mail_Address:
FGDL Frequently Asked Questions: <http://www.fgdl.org/fgdlfaq.html>
Contact_Electronic_Mail_Address:
Mailing list for FGDL: <http://www.fgdl.org/fgdl-l.html>
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Relied on the integrity of the attribute information within the original data layer.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Explanation:
Scale is an important factor in data usage. Certain scale datasets are not suitable for some project, analysis, or modelling purposes. Please be sure you are using the best available data.

1:24000 scale datasets are recommended for projects that are at the county level. 1:24000 data should NOT be used for high accuracy base mapping such as property parcel boundaries.

1:100000 scale datasets are recommended for projects that are at the multi-county or regional level. 1:125000 scale datasets are recommended for projects that are at the regional or state level or larger.

Vector datasets with no defined scale or accuracy should be considered suspect. Make sure you are familiar with your data before using it for projects or analysis. Every effort has been made to supply the user with data documentation. For additional information, see the References section and the Data Source Contact section of this documentation. For more information regarding scale and accuracy, see our webpage at: <http://geoplan.ufl.edu/education.html>. These data are based on interpretation of available information and should not be construed as legally binding.

Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Explanation:
Please note that the NHD is designed to have many users nation wide that use as well as update the dataset. By using the data set in shapefile format it will no longer be possible to update the NHD. For information on how you can take part in the updating of NHD data, or how to get the latest version, see their website: <http://nhd.usgs.gov>
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Explanation:
The NHDRCH dataset is a combination of the Drain and Reach datasets taken from the NHD. The two datasets were nearly identical so the attributes from the Reach dataset was joined to the Drain dataset to form NHDRCH. In order to get flow direction information it is necessary to link the flow table to NHDRCH.shp. This table needs to be linked based on the following:

For incoming flow: link "COM_ID" (NHDRCH.shp) to "COM_ID_2" (flow table)

For outgoing flow: link "COM_ID" (NHDRCH.shp) to "COM_ID_1" (flow table)

more information on this process can be found at <http://nhd.usgs.gov/techref.html>

Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Explanation:
The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that comprise the nations surface water drainage system. It is based initially on the content of the U.S. Geological Survey 1:100,000-scale Digital Line Graph (DLG) hydrography data, integrated with reach-related information from the U.S. Environmental Protection Agency Reach File Version 3.0 (RF3). More specifically, it contains reach codes for networked features and isolated lakes, flow direction, names, stream level, and centerline representations for areal water bodies. Reaches are also defined to represent 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 set out by the Federal Geographic Data Committee.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Explanation:
The National Hydrography Dataset combines elements of the DLG and RF3: spatial accuracy and comprehensiveness from the DLG and network relationships, names, stream level, and a unique identifier (reach code) for surface water features from RF3. The NHD supersedes DLG and RF3 by incorporating them, not by replacing them. Users of DLG and RF3 will find the National Hydrography Dataset both familiar and greatly expanded and refined. The NHD provides a national framework for assigning reach addresses to water-related entities, such as industrial dischargers, 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 in a manner similar to street addresses. 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 better 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. The National Hydrography Dataset is designed to provide comprehensive coverage of hydrologic data for the U.S. While initially based on 1:100,000-scale data, the NHD is designed to incorporate - and encourage the development of higher-resolution data required by many users. It will facilitate the improved integration of water-related data in support of the application requirements of a growing national user community and will enable shared maintenance and enhancement.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Explanation:
For further research of NHD item definitions go to the "National Hydrology Dataset, Contents and Concepts" at: <http://nhd.usgs.gov/chapter1/index.html#_toc474479742>
Logical_Consistency_Report:
Relied on the integrity of the attribute information within the original data layer.
Completeness_Report:
Relied on the integrity of the attribute information within the original data layer.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
United States Geological Survey, The United States Environmental Protection Agency
Publication_Date: 20020626
Title: NATIONAL HYDROGRAPHY DATASET-REACHES
Source_Scale_Denominator: 1:100,000
Type_of_Source_Media: MAP
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20020626
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: USGS
Source_Contribution: Spatial and Attribute Information
Process_Step:
Process_Description:
GeoPlan, during the QA/QC process included the following aspects: (1) Reprojected data to FGDL Albers HPGN (See "Map Projection Parameters" below) (2) Upcased all character records (3) Changed original file name from "nhd" to "nhdrch" (4) Joined NHD.drain to NHD.reach (5) Joined shapefile with FCODE table (6) Renamed DESCRIPT field to DESC (7) DESCRIPT item was added based on the item FTYPE (8) Dropped old internal coverage items: RCH#, RCH_ID (9) Converted coverage to shapefile (10) Clipped shapefile to State of Florida
Process_Date: 2002
Process_Step:
Process_Description:
The NHD is produced by a joint effort between the Environmental Protection Agency (EPA) and U.S. Geological Survey (USGS). Data was downloaded by GeoPlan in coverage format from the USGS/NHD website (<http://nhd.usgs.gov/>) in June 2002. When received, data was in the following projection: Geographic, Datum: NAD 83, Spheroid: GRS80, units: Decimal Degrees. The shapefile was then clipped to the State of Florida, and projected to FGDL Albers HPGN.
Process_Date: 2002
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: 100800
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Albers Conical Equal Area
Albers_Conical_Equal_Area:
Standard_Parallel: 24.000000
Standard_Parallel: 31.500000
Longitude_of_Central_Meridian: -84.000000
Latitude_of_Projection_Origin: 24.000000
False_Easting: 400000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.002048
Ordinate_Resolution: 0.002048
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: D_North_American_1983_HARN
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: nhdrch
Entity_Type_Definition: .DBF file
Entity_Type_Definition_Source: FGDL
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: Shape
Attribute_Definition:
Data attribute inherent to the ESRI shapefile format, which defines the data as a point, polyline, or polygon.
Attribute_Definition_Source: FGDL
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: COM_ID
Attribute_Definition: Unique common identifier of the NHD feature or reach
Attribute_Definition_Source: USGS
Attribute:
Attribute_Label: RCH_CODE
Attribute_Definition:
Unique identifier, 14 digit code with two parts First 8 digits - Hydrologic Unit, code for the cataloging unit in which the reach exists. Hydrologic units provide a systematic means of identifying and subdividing river-basin units. Cataloging unit is the fourth-level subdivision of hydrologic units. Last 6 digits - Assigned in sequential order, and arbitrarily among the reaches.
Attribute_Definition_Source: USGS
Attribute:
Attribute_Label: RCH_DATE
Attribute_Definition: Date the RCH_CODE was assigned
Attribute_Definition_Source: USGS
Attribute:
Attribute_Label: LEVEL
Attribute_Definition:
Stream level which is the main path to which a transport reach belongs. It has a value range of 1 to 99 and the value -9998 for "unspecified".
Attribute_Definition_Source: USGS
Attribute:
Attribute_Label: METERS
Attribute_Definition: Length of the NHD feature, in meters
Attribute_Definition_Source: USGS
Attribute:
Attribute_Label: GNIS_ID
Attribute_Definition:
GNIS identifier of the waterbody reach name. A "blank" means that the name is not populated. GNIS is an 8-digit code from the Geographic Names Information System developed by the USGS and the USBGN. The Federally recognized name of each feature described in the data base is identified, and references are made to a feature's location by State, county, and geographic coordinates.
Attribute_Definition_Source: USGS
Attribute:
Attribute_Label: NAME
Attribute_Definition:
Text of the reach name. A "blank" means that the name is not populated.
Attribute_Definition_Source: USGS
Attribute:
Attribute_Label: FTYPE
Attribute_Definition:
Features are classified by type. These feature types provide the basic description of the features. Each type has a name and a definition. STREAM/RIVER - A body of flowing water. LAKE/POND - A standing body of water with a predominantly natural shoreline surrounded by land. CANAL/DITCH - 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. CONNECTOR - A known, but nonspecific, connection between two nonadjacent network segments. ARTIFICIAL PATH - An abstraction to facilitate coastal and Great Lakes shorelines and to act as a surrogate for lakes and other water bodies. PIPELINE - A closed conduit, with pumps, valves and control devices, for conveying fluids, gases, or finely divided solids.
Attribute_Definition_Source: USGS
Attribute:
Attribute_Label: FCODE
Attribute_Definition:
A five-digit feature code encodes the feature type and combinations of characteristics and values that can be assigned to a type. The first three digits encode the feature type, and the last two digits encode a set of characteristics and values. The general format of the feature code is FFFCC, in which FFF is the three-digit code for a feature type. CC is the two-digit code for a combination of values for characteristics associated with a feature type. If only the feature type is identified, these last two digits are assigned the value "0".
Attribute_Definition_Source: USGS
Attribute:
Attribute_Label: DESC
Attribute_Definition:
The description field uses a single character string to encode one or more characteristics and values for each feature code. The general format of the character string is characteristic|value, in which "characteristic" is the name of the characteristic. The vertical line character ("|") separates the characteristic and value. "Value" is the value of the characteristic for the feature code.
Attribute_Definition_Source: USGS
Attribute:
Attribute_Label: DESCRIPT
Attribute_Definition: FGDL added item based on the item FTYPE
Attribute_Definition_Source: USGS
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Florida Geographic Data Library (FGDL)
Contact_Address:
Address_Type: mailing address
Address: 431 Architecture PO Box 115706
City: Gainesville
State_or_Province: Florida
Postal_Code: 32611-5706
Country: United States
Contact_Electronic_Mail_Address:
Web site: <http://www.fgdl.org>
Contact_Electronic_Mail_Address:
Technical Support: <http://www.fgdl.org/fgdlfeed.html>
Contact_Electronic_Mail_Address:
For FGDL Software: <http://www.fgdl.org/software.html>
Contact_Electronic_Mail_Address:
FGDL Frequently Asked Questions: <http://www.fgdl.org/fgdlfaq.html>
Contact_Electronic_Mail_Address:
Mailing list for FGDL: <http://www.fgdl.org/fgdl-l.html>
Resource_Description: Downloadable Data or CD ROM.
Distribution_Liability:
THE FGDL DATA AS PROVIDED BY CONTRIBUTING ORGANIZATIONS AND ANY PROGRAMMING SOFTWARE CREATED BY THE UNIVERSITY OF FLORIDA GEOPLAN CENTER (COLLECTIVELY THE 'MATERIALS') ARE COPYRIGHTED BY THE UNIVERSITY OF FLORIDA GEOPLAN CENTER FOR THE FGDL CONTRIBUTING AGENCIES AND ORGANIZATIONS (THE 'DATA PROVIDERS'). DO NOT REPRODUCE, REDISTRIBUTE OR RESELL THE MATERIALS, OR PROVIDE THE MATERIALS FOR FREE TO CUSTOMERS OR CLIENTS, OR PLACE THE MATERIALS FOR DOWNLOAD ON A WEBSITE. ADDITIONALLY, WHEN USING FGDL DATA OR SOFTWARE IN PROJECTS, MAPS, ETC.; YOU AGREE TO ACKNOWLEDGE THE FGDL AS A DATA SOURCE. THE MATERIALS ARE PROVIDED AS IS.THE UNIVERSITY OF FLORIDA GEOPLAN CENTER MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE QUALITY OR SUITABILITY OF THE MATERIALS, EITHER EXPRESSLY OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.THE UNIVERSITY OF FLORIDA GEOPLAN CENTER MAKES NO WARRANTIES, GUARANTIES OR REPRESENTATIONS AS TO THE TRUTH, ACCURACY OR COMPLETENESS OF THE DATA PROVIDED BY THE FGDL CONTRIBUTING ORGANIZATIONS. THE UNIVERSITY OF FLORIDA GEOPLAN CENTER SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED AS A RESULT OF USING, MODIFYING, CONTRIBUTING OR DISTRIBUTING THE MATERIALS.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 66.042
Metadata_Reference_Information:
Metadata_Date: 20020924
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
National Mapping Division, U.S. Department of Interior, U.S. Geological Survey
Contact_Address:
Address_Type: mailing address
Address: 12201 Sunrise Valley Drive
City: Reston
State_or_Province: VA
Postal_Code: 20192
Contact_Voice_Telephone: 1-888-ASK-USGS (275-8747)
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 2.7.3 on Tue Sep 24 14:09:13 2002