Hydrologic_Unit_4th_Code

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator:
Natural Resources Conservation Service - Arizona State Headquarters
Publication_Date: 2008
Title: Hydrologic_Unit_4th_Code
Edition:
Natural Resources Conservation Service - Arizona State Headquarters
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Phoenix, Arizona
Publisher: Natural Resources Conservation Service
Online_Linkage:
\\PCHP8210VGL\C$\projects_2009\nfwww\coc\cof_pgdb12\Water\Water.mdb
Description:
Abstract:
This data set is a complete digital hydrologic unit boundary layer to the 6th level for the State of Arizona. This data set consists of geo-referenced digital data and associated attributes created in accordance with the "FGDC Proposal, Version 2.0 - Federal Standards For Delineation of Hydrologic Unit Boundaries 3/01/02"(<http://www.ftw.nrcs.usda.gov/huc_data.html>), and amended with the Federal Standards For Delineation of Hydrologic Unit Boundaries; Version 2.0 October 1, 2004. Polygons are attributed with hydrologic unit codes to the 6th level of hydrologic units, name, size, downstream hydrologic unit, type of watershed, non-contributing areas and flow modification. Lines are attributed with the highest hydrologic unit code for each watershed, linesource and a metadata reference file.
Purpose:
The hydrologic unit boundaries provide a uniquely identified and uniform method of subdividing large drainage areas. The smaller sized watersheds are useful for numerous application programs supported by a variety of local, State, and Federal Agencies. This data set is intended to be used as a tool for water-resource management and planning activities, particularly for site-specific and localized studies requiring a level of detail provided by large-scale map information. The dataset will be appended to a larger seamless nationally consistant geospatial database as other states complete their portion of the Watershed Boundary Dataset.
Supplemental_Information:
Outlet methodology: Outlet points were chosen by first choosing as many full stream reaches tributaries to the main stem as possible (classic watersheds). Outlets are then attempted adjacent to these classic watersheds on the main stem. Any remaining watersheds are then chosen in accordance to the next best available option. See "Process Step" for further information.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2008
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -113.031056
East_Bounding_Coordinate: -110.080712
North_Bounding_Coordinate: 36.388507
South_Bounding_Coordinate: 33.527392
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: HUC
Theme_Keyword: Hydrologic Units
Theme_Keyword: Hydrologic Unit Code
Theme_Keyword: Region
Theme_Keyword: Subregion
Theme_Keyword: Basin
Theme_Keyword: Subbasin
Theme_Keyword: Watershed
Theme_Keyword: Watershed Boundaries
Theme_Keyword: Boundaries
Theme_Keyword: WBD
Theme_Keyword: Watershed Boundary Dataset
Theme_Keyword: HUA
Theme_Keyword: Hydrologic Unit Area
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Arizona
Place_Keyword: Colorado River
Access_Constraints: None
Use_Constraints:
The distributor shall not be held liable for improper or incorrect use of this data, based on the description of appropriate/inappropriate uses described in this metadata document. It is strongly recommended that this data is directly acquired from the distributor and not indirectly through other sources which may have changed the data in some way. These data should not be used at scales greater than 1:24,000 for the purpose of identifying hydrographic watershed boundary feature locations. United States Department of Agriculture-Natural Resources Conservation Service should be acknowledged as the data source in products derived from these data. The Watershed Boundary Dataset is public information and may be interpreted by all organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application of the data. Federal, State, or local regulatory bodies are not to reassign to the Natural Resources Conservation Service any authority for the decisions they make. The Natural Resources Conservation Service will not perform any evaluations of these maps or purposes related solely to State or local regulatory programs. Photographic or digital enlargement of these maps to scales greater than that at which they were originally delineated can result in misrepresentation of the data. If enlarged, the maps will not include the fine detail that would be appropriate for mapping at the small scale. Digital data files are periodically updated. Files are dated, and users are responsible for obtaining the latest version of the data from the source distributor.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Keith Larson
Contact_Organization: USDA-Natural Resources Conservation Service
Contact_Position: State GIS Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: 230 N. 1st Ave., Suite 509
City: Phoenix
State_or_Province: Arizona
Postal_Code: 85003
Country: USA
Contact_Voice_Telephone: (602) 280-8831
Contact_Facsimile_Telephone: (602) 280-8805
Contact_Electronic_Mail_Address: keith.larson@az.usda.gov
Contact_Instructions: Please email questions and requests.
Data_Set_Credit:
Funding for the Arizona Watershed Boundary Dataset (WBD) was provided by the US Natural Resources Conservation Service, US Bureau of Land Management, US Environmental Protection Agency, Arizona Geographic Information Council, US Forest Service, US Department of Defense, and the Navajo Nation. Representatives from these and other organizations also contributed time and salary towards quality review of the dataset.
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.6.1500
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
100% of the attributes were visually verified using digital raster graphics (DRGs). The accuracy of this data is dependent on the level of detail of the source material and the interprtation procedures for capturing that source. Some areas required use of imagery which may differ from the DRG.
Logical_Consistency_Report:
There are no unclosed polygons, intersections without nodes, or polygons without labels or with more than one label. Topology rules were defined and verified prior to certification.
Completeness_Report:
All fields for all polygons in the polygon attribute table are attributed. Some polygons in the Ncontrb_a field might have a 0 value. All fields for the lines in the .aat are attributed. The lines adjacent to the universal polygon are attributed with a 0 for the hu_level. These cannot be attributed until the adjacent states complete their linework at which point the highest level of hydrologic unit can be determined.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The WBD was produced using Enhanced Digital Raster Graphics (DRG-e's) digital images as source map. Data completeness for DRG files reflect content of the source graphic and may therefore be reflected in the completeness and accuracy of the WBD. The map was digitized from USGS 1:24,000-scale digital raster graphic base maps, with an inherited error of +/- 40 feet according to USGS National Map Accuracy Standards. Digitized line locations were held to the +/- 40 foot accuracy standards by ensuring that all lines were within a 12 meter buffer of where visual interpretion put the actual boundary. Any lines outside the buffer were corrected. It is estimated that the errors detected were less than 10%. It should be noted that while general rules of hydrology were used (i.e. water flows downhill), the location of boundaries is still somewhat subjective as the 1:24,000-scale DRG-e do not always provide enough information for identifying the location of the boundaries. In these instances group consensus was used. Please refer to the methods section for more details on watershed delineation rules. Unquantifiable errors may be associated with coordinate shift. NAPP and NAIP Imagery were used extensively in the QA/QC process which has greater accuracy and is more current than the DRG source.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2002
Title: Enhanced Digital Raster Graphic
Geospatial_Data_Presentation_Form: vector digital data
Online_Linkage: <http://www.usgs.gov>
Online_Linkage: <http://www.beartoothmaps.com>
Source_Scale_Denominator: 24000
Type_of_Source_Media: CD-ROM
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: unknown
Beginning_Time: unknown
Ending_Date: unknown
Ending_Time: unknown
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: DRG-e
Source_Contribution:
Source Contribution map delineation, Digital Orthophotography, and field verification.
Process_Step:
Process_Description:
Process description: Level 6 (12 digit) subwatersheds were delinieated within a nested hierarchical structure using the existing Level 5. Level 5 (10 digit) watersheds were delineated within a nested hierarchical structure using the existing Level 4 (8 digit) watershed delineation as a starting framework. The 11-digit code was reduced to 10 digits to conform to the new Federal Standards for the Delineation of Hydrologic Units Boundaries, by dropping the zero in the last position. The typical size of a level 6 watershed is 10,000 to 40,000 acres. The typical size of a level 5 watershed is 40,000 to 250,000 acres. Due to the unique landscape of Arizona, approximately 15% of the subwatersheds in the state exceed 40,000 acres or are smaller than 10,000 acres. The order of precedence for establishing the outlet point of a watershed is: (1) at the outlet of a lake or pond; (2) at a confluence for a full stream reach forming classic watershed; (3) at the adjacent point to (2); (4) at some topographic feature, such as a natural gap in topography; (5) at a dam or stream gauging station.
Source_Used_Citation_Abbreviation: USGS-DRG
Source_Used_Citation_Abbreviation: USGS-DOQ
Source_Used_Citation_Abbreviation: USDA-NAIP
Process_Date: 2008
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Keith Larson
Contact_Organization: USDA-Natural Resources Conservation Service
Contact_Position: State GIS Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: 3003 N. Central Ave., Suite 800
City: Phoenix
State_or_Province: Arizona
Postal_Code: 85012
Country: USA
Contact_Voice_Telephone: (602) 280-8831
Contact_Facsimile_Telephone: (602) 280-8831
Contact_Electronic_Mail_Address: keith.larson@az.usda.gov
Process_Step:
Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation: N:\WBD\Arizona\wbdhu10_a_az\metadata.xml
Process_Step:
Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation:
N:\Work\WBD\Final_Review\Statewide\AZ_WBD_09-12-2008_FINAL.gdb\metadata.xml
Process_Step:
Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation: C:\DOCUME~1\CBEYER~1\LOCALS~1\Temp\xmlD0.tmp
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 7
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 3441
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 480
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 2063
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 12
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -111.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.001000
Ordinate_Resolution: 0.001000
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:
Altitude_Resolution: 0.000010
Altitude_Encoding_Method:
Explicit elevation coordinate included with horizontal coordinates
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Hydrologic_Unit_4th_Code
Attribute:
Attribute_Label: Shape_Area
Attribute_Definition: Area of feature in internal units squared.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real 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: Shape_Length
Attribute_Definition: Length of feature in internal units.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
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: HUC4
Attribute:
Attribute_Label: HUC_NAME
Attribute:
Attribute_Label: DATA_SOURCE
Attribute:
Attribute_Label: METHOD
Detailed_Description:
Entity_Type:
Entity_Type_Label: AZ_wbd_polygons_FINAL
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Keith Larson
Contact_Organization: USDA-Natural Resources Conservation Service
Contact_Position: State GIS Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: 230 N. 1st Ave., Suite 509
City: Phoenix
State_or_Province: Arizona
Postal_Code: 85003
Country: USA
Contact_Voice_Telephone: (602) 280-8831
Contact_Facsimile_Telephone: (602) 280-8805
Contact_Electronic_Mail_Address: keith.larson@az.usda.gov
Contact_Instructions: please e-mail with data requests.
Resource_Description: Downloadable Data
Distribution_Liability:
The distributor shall not be held liable for improper or incorrect use of this data, based on the description of appropriate/inappropriate uses described in this metadata document. It is strongly recommended that this data is directly acquired from the distributor and not indirectly through other sources which may have changed the data in some way. These data should not be used at scales greater than 1:24,000 for the purpose of identifying hydrographic watershed boundary feature locations in Arizona. The Natural Resources Conservation Service makes no claims for the data's suitability for other purposes. The Natural Resources Conservation Service should be acknowledged as the data source in products derived from these data. The Watershed Boundary Dataset is public information and may be interpreted by all organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application of the data. Federal, State, or local regulatory bodies are not to reassign the boundaries authorized by the Natural Resources Conservation Service. The Natural Resources Conservation Service will not perform any evaluations of these maps or purposes related solely to State or local regulatory programs. Photographic or digital enlargement of these maps to scales greater than that at which they were originally delineated can result in misrepresentation of the data. If enlarged, the maps will not include the fine detail that would be appropriate for mapping at the small scale. Digital data files are periodically updated. Files are dated, and users are responsible for obtaining the latest version of the data from the source distributor.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://datagateway.nrcs.usda.gov/>
Network_Resource_Name: <http://www.ncgc.nrcs.usda.gov/products/datasets/watershed/>
Fees: none
Ordering_Instructions: <http://datagateway.nrcs.usda.gov/>
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2008
Metadata_Reference_Information:
Metadata_Date: 20090602
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Keith Larson
Contact_Organization: USDA-Natural Resources Conservation Service.
Contact_Organization_Primary:
Contact_Organization:
REQUIRED: The organization responsible for the metadata information.
Contact_Person: REQUIRED: The person responsible for the metadata information.
Contact_Position: State GIS Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: 230 N. 1st Ave., Suite 509
City: Phoenix
State_or_Province: Arizona
Postal_Code: 85003
Country: USA
Contact_Voice_Telephone: (602) 280-8831
Contact_Facsimile_Telephone: (602) 280-8805
Contact_Electronic_Mail_Address: keith.larson@az.usda.gov
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
Generated by mp version 2.9.6 on Tue Jun 02 11:51:07 2009