Identification_Information: Citation: Citation_Information: Originator: Natural Resources Conservation Service - Arizona State Headquarters Publication_Date: 2008 Title: AZwbd_polygons_FINAL 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: \\TXFORTWORTD199\Q\WBD\WBD_Review\AZ\AZ_WBD_09-24-2008_FINAL.gdb 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: -114.994693 East_Bounding_Coordinate: -108.633360 North_Bounding_Coordinate: 37.609485 South_Bounding_Coordinate: 31.332291 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 9.2.5.1450 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: Meta_ID: AZ02 Process_Description: USGS, Water Science Center, Salt Lake City; Edits to Downstream coding. Source_Used_Citation_Abbreviation: Process_Date: 200908 Process_Step: Meta_ID: AZ03 Process_Description: Edits to HUC10 names submitted by in-state data steward. Source_Used_Citation_Abbreviation: Process_Date: 20091229 Process_Step: META_ID: AZ04 Process_Description: Edits by USGS Water Science Center in Salt Lake City, Utah: The Line Mods, HU_Level, Linesource, DS codes and states were checked. Source_Used_Citation_Abbreviation: Process_Date: 201105 Process_Step: META_ID: AZ05 Process_Description: Edits by USGS in Nevada (Sue Buto) Downstream codes Source_Used_Citation_Abbreviation: Process_Date: 201106 Process_Step: META_ID: AZ06 Process_Description: Edits by USGS Water Science Center in Salt Lake City, Utah; made changes to the linework and the polys. I updated the linework and the corresponding polygons, as well as the linesource codes, and downstream codes where applicable. Source_Used_Citation_Abbreviation: Process_Date: 20111109 Process_Step: META_ID: AZ07 Process_Description: USGS Water Science Center in Salt Lake City, Utah: Changes to the linework and the polys; updated the linework and the corresponding polygons, as well as the linesource codes, and downstream codes where applicable. Source_Used_Citation_Abbreviation: Process_Date: 201201 Process_Step: META_ID: AZ08 - MEX/US border updates AZ09 - Mod updates Process_Description: edits by USGS Water Science Center in Salt Lake City, Utah. Source_Used_Citation_Abbreviation: Process_Date: 201205 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: 3441 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: Geographic: Latitude_Resolution: 0.000000 Longitude_Resolution: 0.000000 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: 298.257222 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Resolution: 0.000100 Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: AZwbd_polygons_FINAL 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: Huc_8 Attribute: Attribute_Label: Huc_10 Attribute: Attribute_Label: Huc_12 Attribute: Attribute_Label: Acres Attribute: Attribute_Label: States Attribute: Attribute_Label: Ncontrb_a Attribute: Attribute_Label: Hu_10_ds Attribute: Attribute_Label: Hu_10_name Attribute: Attribute_Label: Hu_10_mod Attribute: Attribute_Label: Hu_10_type Attribute: Attribute_Label: Hu_12_ds Attribute: Attribute_Label: Hu_12_name Attribute: Attribute_Label: Hu_12_mod Attribute: Attribute_Label: Hu_12_type Attribute: Attribute_Label: Hu_10_GNIS Attribute: Attribute_Label: Hu_12_GNIS 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. 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 Overview_Description: Entity_and_Attribute_Overview: This is a description of attributes by field from the Federal Standards for Delineation of Hydrologic Unit Boundaries 1) Polygon attributes Huc_8 : Eight Digit Hydrologic Unit Code A unique 8-digit code from the USGS map series "Hydrologic Unit Maps". The same number was used in every record that pertains to a subwatershed that resides within the same 8-digit sub-basin.Numbers were assigned in an upstream to downstream fashion. Where no downstream/upstream relationship could be determined numbers were assigned in a clockwise fashion. Huc_10: Ten Digit Hydrologic Unit Code This field provides a unique 10-digit code for each watershed. This same number was used in every record that pertains to a subwatershed that resides within the same 10-digit watershed. Numbers were assigned in an upstream to downstream fashion. Where no downstream/upstream relationship could be determined numbers were assigned in a clockwise fashion. Huc_12: Twelve Digit Hydrologic Unit Code This field provides a unique 12-digit code for each subwatershed. Numbers were assigned in an upstream to downstream fashion. Where no downstream/upstream relationship could be determined numbers were assigned in a clockwise fashion. Acres: Acres Area of subwatershed including non-contributing areas calculated to acres as a whole number, no decimals. The "Acres" field was calculated from the "Area" field. States: States The "States" field includes the names of all state(s) that the subwatershed falls within. The 2-digit postal abbreviation in upper case and in alphabetical order was used, separated with a comma. Ncontrb_a: Non-Contributing Area Drainage areas that do not flow toward the outlet of any hydrologic unit are considered non-contributing. If a non-contributing area is on the boundary between two or more hydrologic units, the non-contributing area is associated with the hydrologic unit adjacent to the low point on the boundary. This attribute should be the total of the non-contributing areas within a hydrologic unit calculated in acres. Hu_10_ds: Fifth Level Downstream Hydrologic Unit Code This field has the 10-digit code of the 5th level hydrologic unit that is receiving the majority of the flow from the watershed that the 6th level HU falls within. Outlets created by ditching or other artificial drainage were not considered for this field. If an HU flows into an ocean or the Gulf of Mexico, this field was populated with "OCEAN" and if a HU flows into one of the Great Lakes the term "LAKE" was used. If a HU flows across international borders, "CANADA" or "MEXICO" was used depending on which country the HU drains into. If an HU is a closed basin, then the term "CLOSED BASIN"was used. Hu_10_name: Fifth Level Hydrologic Unit Name This field used officially recognized names only. This field was populated by following the directions in subsection 6.3 "Watershed and Subwatershed Naming Protocol". The name used to attribute the watershed was used only once within a 4th level unit. Hu_10_mod: Fifth Level Hydrologic Unit Modifications This field identifies any type of modifications to natural overland flow that alters the location of the hydrologic unit boundary for a 10-digit watershed. This field shows the most significant to least significant modification(s) to the watershed boundary. One or more of the following abbreviations was used. SC - Stormwater Canal or Drainage Canal ID - Irrigation Ditch IT - Interbasin Transfer BC - Barge Canal or Navigation Canal SD - Stormwater Ditch PD - Pipe Diversion CD - Channel Diversion NC - Noncontributing Area KA - Karst LE - Levee NM - No Modifications OC - Overflow Channel or Flume DM - Dam at outlet or HU boundary GC - General Canal/Ditch PS - Pumping Station DD - Drainage Ditch SI - Siphon AD - Aqueduct RS - Reservoir TF - Transportation Feature (road, railroad, docks etc.) GF - Ground-Water Flow MA - Mining Activity UA - Urban Area GL - Glacier IF - Ice Field OF - Overbank Flow OT - Other Hu_10_type: Fifth Level Hydrologic Unit Type This field was populated with the hydrologic unit type from the list provided that most closely identifies the watershed. S - "Standard" hydrologic unit - Any land HU with drainage flowing to a single outlet point, excluding non-contributing areas. This includes areas or small triangular wedges between adjacent HU's that remain after classic hydrologic units are delineated. Some examples include "true", "classic", "composite", and "remnant" hydrologic units. C - "Closed Basin" hydrologic unit - A drainage area that is 100% non-contributing. This means all surface flow is internal, no overland flow leaves the hydrologic unit through the outlet point. F - "Frontal" hydrologic unit - Areas along the coastline of lakes, oceans, bays, etc. that have more than one outlet. These HU's are predominantly land with some water areas at or near the outlet(s). M - “Multiple Outlet” hydrologic unit An area that has more than one natural outlet; for example, an outlet located on a stream with multiple channels. This does not include frontal or water hydrologic units, hydrologic units with artificial interbasin transfers, drainage outlets through karst or ground-water flow, or outlets that cross a stream with an island. This code should be used only in rare instances. W - "Water" hydrologic unit - Hydrologic units that are predominantly water with adjacent land areas, ex. lake, easturies, harbors. I - "Island" hydrologic unit - A hydrologic unit that is one or more islands and adjacent water out to the toe of the shore face. U - "Unclassified" hydrologic unit - A hydrologic unit that can't be defined or doesn't fit into one of the types that have been listed. Hu_12_ds: Sixth Level Downstream Hydrologic Unit Code This field was populated with the 12-digit code of the 6th level hydrologic unit that is receiving the majority of the flow from the subwatershed. Outlets created by ditching or other artificial drainage were not considered for this field. If a HU flows into an ocean or the Gulf of Mexico it was populate with "OCEAN" and if a HU flows into one of the Great Lakes the term "LAKE" was used. If a HU flows across international borders, "CANADA" or "MEXICO" was used depending on which country the HU drains into. If an HU is a closed basin, this field was populated with the term "CLOSED BASIN". Hu_12_name: Sixth Level Hydrologic Unit Name Officially recognized names were used in this field. This field was populated by following the directions in subsection 6.3 "Watershed and Subwatershed Naming Protocol". The name used to attribute the subwatershed was used only once within a 4th level unit. Hu_12_mod: Sixth Level Hydrologic Unit Modifications This field identifies any type of man-made modification(s) to natural overland flow that alters the location of the hydrologic unit boundary for a 12-digit subwatershed. One or more of the following abbreviations was chosen for this field. SC - Stormwater Canal or Drainage Canal ID - Irrigation Ditch IT - Interbasin Transfer BC - Barge Canal or Navigation Canal SD - Stormwater Ditch PD - Pipe Diversion CD - Channel Diversion NC - Noncontributing Area KA - Karst LE - Levee NM - No Modifications OC - Overflow Channel or Flume DM - Dam at outlet or HU boundary GC - General Canal/Ditch PS - Pumping Station DD - Drainage Ditch SI - Siphon AD - Aqueduct RS - Reservoir TF - Transportation Feature (road, railroad, docks etc.) GF - Ground-Water Flow MA - Mining Activity UA - Urban Area GL - Glacier IF - Ice Field OF - Overbank Flow OT - Other Hu_12_type: Sixth Level Hydrologic Unit Type This field was populated with the hydrologic unit type from the list provided that most closely identifies the subwatershed. S - "Standard" hydrologic unit - Any land HU with drainage flowing to a single outlet point, excluding non-contributing areas. This includes areas or small triangular wedges between adjacent HU's that remain after classic hydrologic units are delineated. Some examples include "true", "classic", "composite", and "remnant" hydrologic units. C - "Closed Basin" hydrologic unit - A drainage area that is 100% non-contributing. This means all surface flow is internal, no overland flow leaves the hydrologic unit through the outlet point. F - "Frontal" hydrologic unit - Areas along the coastline of lakes, oceans, bays, etc. that have more than one outlet. These HU's are predominantly land with some water at or near the outlet(s). M - “Multiple Outlet” hydrologic unit An area that has more than one natural outlet; for example, an outlet located on a stream with multiple channels. This does not include frontal or water hydrologic units, hydrologic units with artificial interbasin transfers, drainage outlets through karst or ground-water flow, or outlets that cross a stream with an island. This code should be used only in rare instances. W - "Water" hydrologic unit - Hydrologic units that are predominantly water with adjacent land areas, ex. lake, easturies. I - "Island" hydrologic unit - A hydrologic unit that is one or more islands and adjacent water out to the toe of the shore face. U - "Unclassified" hydrologic unit - A hydrologic unit that can't be defined or doesn't fit into one of the types that have been listed. 2) Line attributes Hu_level: Hydrologic Unit Level This field provides the means to create cartographically pleasing maps. This field is populated with the highest hydrologic unit level (smallest number) for the line (arc) represented by the record. The attribute was recorded using numbers 1 through 6 representing each level with 1 being the highest and 6 the lowest level. An example would be if a line represents a region, subregion, basin, subbasin, watershed, and subwatershed boundary, then this cell was populated with a 1 (Region). Below is a list of numbers used for each level. Level Digit# Name 1 2 Region 2 4 Subregion 3 6 Basin 4 8 Subbasin 5 10 Watershed 6 12 Subwatershed Linesource: Line Spatial Data Source The Linesource indicates the base map source(s) used to delineate at 1:24,000 scale. The field was populated using one of the standardized code(s) listed below. If more than one code was used, then a comma was used to separate the codes. TOPO24 - Delineation from hardcopy 1:24,000 scale topographic maps TOPO25 - Delineation from hardcopy 1:25,000 topgraphic maps, only Alaska and Caribbean TOPO63 - Delineation from hardcopy 1:63,360 topographic maps, only Alaska and Caribbean DRG24 - Delineation from 1:24,000 scale Digital Raster Graphics DRG25 - Delineation from 1:25,000 Digital Raster Graphics, only Alaska and Caribbean DRG63 - Delineation from 1:63,360 Digital Raster Graphics, only Alaska and Caribbean DEM10 - Derived from 10 meter Digital Elevation Model DEM30 - Derived from 30 meter Digital Elevation Model NED30 - Derived from 30 meter National Elevation Dateset Model EDNA30 - (formally NED-H), derived from 30 meter Elevation Derivatives for National Applications BATH"scale" (ex. BATH24) - Interpreted from NOAA 1:24,000 scale bathymetric data HYPSO"scale" (ex. HYPSO24)- Delineated from 1:24,000 scale contour data ORTHO"scale" (ex. ORTHO12) - Interpreted from 1:12,000 scale Ortho-imagery DEDEM10 - Drainage enforced 10 meter Digital Elevation Model DEDEM30 - Drainage enforced 30 meter Digital Elevation Model GPS - Derived from Global Positioning System LIDAR - Derived from LIDAR IFSAR - Derived from IFSAR data OTH - Other UNK - Unknown All other reference and source maps not listed should be noted in the metadata. Meta_id: Metadata ID Number The Metadata ID is a code that identifies which metadata file applies to the arc. In most cases there is only one metadata file. However, in some cases more than one metadata file was used to identify different groups and/or procedures used to produce the lines. The metadata ID is a 4-character code starting with the 2-letter state postal code, followed by a 2-digit sequence number. For example "OK01", "ID02", etc Entity_and_Attribute_Detail_Citation: Federal Standard for Delineation of Hydrologic Unit Boundaries Metadata_Reference_Information: Metadata_Date: 20080929 Metadata_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 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