USGS Home
USGS Home USGS Home
Contact USGS
Search USGS
 Alaska Geospatial Data Committee
spacer
spacer

Hydrologic Unit Boundaries of the Cook Inlet Basin

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Tim Brabets
Publication_Date: 1998
Publication_Time:
Title: Hydrologic Unit Boundaries of the Cook Inlet Basin
Edition:
Geospatial_Data_Presentation_Form:
Series_Name Issue_Identification
Publication_Information:
Publication_Place: Anchorage
Publisher: USGS
Other_Citation_Details:
Online_Linkage: <URL:https://agdc.usgs.gov/data/usgs/water>

Description:
Abstract:
nawqa_huc is a polygon coverage of hydrologic unit boundaries within
the Cook Inlet Basin National Water-Quality Assessment (NAWQA)study area in
southcentral Alaska. A hydrologic unit is a region or area bounded by a
drainage divide and occupied by a drainage system. Each hydrologic unit
(drainage area) boundary and an 8-digit name (huc.code) is from the report
U.S. Geological Survey, 1987, Hydrologic unit map-1987-State of Alaska:
U.S. Geological Survey map, 1 sheet.

Purpose:
The purpose of this coverage is to define the extent and boundaries of drainage systems within the Cook Inlet Basin.

Supplemental_Information:

Procedures_Used: The hydrologic unit boundaries were drawn on the 1:250000 paper quadrangle maps. The boundaries were then digitized and entered into ARC-INFO. Using ARC-EDIT procedures, the data were edited where appropriate and then combined into one coverage.

Revisions:

Reviews_Applied_to_Data:

Boundaries drawn on the quadrangles were checked for accuracy by Bob Lamke and Tim Brabets. Documentation was reviewed by Roy Glass and Liska Snyder.

Related_Spatial_and_Tabular_Data_Sets:

Lamke, R.D., McIntire, J.A., and Brabets, T.P., 1995, Alaska Hydrologic Unit Codes, USGS written communication.

Other_References_Cited: U.S. Geological Survey, 1987, Hydrologic unit map - 1987- State of Alaska: U.S. Geological Survey map, 1 sheet.

Notes: None

Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 19970424
Currentness_Reference:
Current as of April, 1997

Status:
Progress: Complete
Maintenance_and_Update_Frequency:
None planned.

Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -154.85231357
East_Bounding_Coordinate: -146.05590611
North_Bounding_Coordinate: 63.79333933
South_Bounding_Coordinate: 58.43916036
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword:
NAWQA, Cook Inlet, Drainage Areas, Hydrologic Unit Codes, Alaska
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Cook Inlet - Southcentral Alaska
Stratum:
Stratum_Keyword_Thesaurus: None
Stratum_Keyword: None
Temporal:
Temporal_Keyword_Thesaurus: None
Temporal_Keyword: None
Access_Constraints:
n/a

Point_of_Contact USGS-WRD

Use_Constraints:
The coverage was developed using 1:250000 scale maps. Thus, users should be aware of the limitations if using smaller scales.

Point_of_Contact:

Data_Set_Credit:
Bob Lamke drew the boundaries on the 1:250000 maps as a volunteer project after he retired in 1993. Mark Inghram (Alaska Department of Natural Resources), Jackie McIntire, and Tim Brabets digitized and edited the boundaries.

Security_Information:
Security_Classification_System: None
Security_Classification: Unclassified
Security_Handling_Description: None
Native_Data_Set_Environment: dgux, 5.4R3.10, AViiON UNIX, ARC/INFO version 7.0.4


Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: See Entity_Attribute_Information
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: See Explanation
Attribute_Accuracy_Explanation:
Attribute accuracy is described, where present, with each attribute defined in the Entity and Attribute Section.
Logical_Consistency_Report: Polygon and chain-node topology present.
Completeness_Report:
n/a

Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The boundaries of the hydrologic units were drawn on 1:250,000 paper maps. A map was placed on the digitizing tablet and four tick marks were digitized. If the RMS error for the 4 tick marks was less than 0.005, the hydrologic unit boundaries were digitized. If the RMS error was greater than 0.005, the tick marks were digitized again until the RMS error was less than or equal to 0.005.

Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
n/a

Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Publication_Date:
Title:
Source_Scale_Denominator: 250000
Type_of_Source_Media:
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date:
Source_Currentness_Reference:
Source_Citation_Abbreviation:
Source_Contribution:
Process_Step:
Process_Description: TBRABETS COPY /HOME/BOAT3/TBRABETS/TEMP/AK_HUC/AK_HUC
Source_Used_Citation_Abbreviation: None
Process_Date: 19951005
Process_Time: 1232
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS ARCEDIT /PROJECTS/PROJ_SLED/AK.COVS/NAWQA_HUC
Source_Used_Citation_Abbreviation: None
Process_Date: 19970423
Process_Time: 1453
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS COPY /PROJECTS/PROJ_SLED/AK.COVS/NAWQA_HUC
Source_Used_Citation_Abbreviation: None
Process_Date: 19970423
Process_Time: 1458
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS ARCEDIT /PROJECTS/PROJ_SLED/NAWQA/NAWQA_HUC
Source_Used_Citation_Abbreviation: None
Process_Date: 19970423
Process_Time: 1526
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS BUILD NAWQA_HUC POLY
Source_Used_Citation_Abbreviation: None
Process_Date: 19970424
Process_Time: 0730
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS ARCEDIT /PROJECTS/PROJ_SLED/NAWQA/NAWQA_HUC
Source_Used_Citation_Abbreviation: None
Process_Date: 19970424
Process_Time: 0927
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS BUILD NAWQA_HUC POLY
Source_Used_Citation_Abbreviation: None
Process_Date: 19970424
Process_Time: 0927
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS ARCEDIT /PROJECTS/PROJ_SLED/NAWQA/NAWQA_HUC
Source_Used_Citation_Abbreviation: None
Process_Date: 19970424
Process_Time: 1015
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS BUILD NAWQA_HUC POLY
Source_Used_Citation_Abbreviation: None
Process_Date: 19970424
Process_Time: 1016
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS DOCUMENT NAWQA_HUC DELETE TBRABETS
Source_Used_Citation_Abbreviation: None
Process_Date: 19970424
Process_Time: 1427
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS DOCUMENT NAWQA_HUC CREATE TBRABETS
Source_Used_Citation_Abbreviation: None
Process_Date: 19970424
Process_Time: 1511
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS
Source_Used_Citation_Abbreviation: None
Process_Date: 19970424
Process_Time: 1525
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS
Source_Used_Citation_Abbreviation: None
Process_Date: 19970425
Process_Time: 1528
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS
Source_Used_Citation_Abbreviation: None
Process_Date: 19970428
Process_Time: 1500
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS
Source_Used_Citation_Abbreviation: None
Process_Date: 19970620
Process_Time: 1422
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS
Source_Used_Citation_Abbreviation: None
Process_Date: 19980116
Process_Time: 0908
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS
Source_Used_Citation_Abbreviation: None
Process_Date: 19980120
Process_Time: 1429
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS COPY /PROJECTS/PROJ_SLED/NAWQA/NAWQA_HUC
Source_Used_Citation_Abbreviation: None
Process_Date: 19980121
Process_Time: 1003
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS
Source_Used_Citation_Abbreviation: None
Process_Date: 19980122
Process_Time: 0739
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS
Source_Used_Citation_Abbreviation: None
Process_Date: 19980131
Process_Time: 0828
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS LABELERRORS NAWQA_HUC
Source_Used_Citation_Abbreviation: None
Process_Date: 19980227
Process_Time: 0950
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS NODEERRORS NAWQA_HUC DANGLE
Source_Used_Citation_Abbreviation: None
Process_Date: 19980227
Process_Time: 0950
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS
Source_Used_Citation_Abbreviation: None
Process_Date: 19980227
Process_Time: 0956
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS
Source_Used_Citation_Abbreviation: None
Process_Date: 19980227
Process_Time: 0959
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS
Source_Used_Citation_Abbreviation: None
Process_Date: 19980227
Process_Time: 1009
Source_Produced_Citation_Abbreviation: None
Cloud_Cover: n/a


Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 31
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 264
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 32


Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Albers Conical Equal Area
Albers_Conical_Equal_Area:
Standard_Parallel: 55
Standard_Parallel: 55
Longitude_of_Central_Meridian: -154
Latitude_of_Projection_Origin: 50
False_Easting: 0.00000
False_Northing: 0.00000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 1.0
Ordinate_Resolution: 1.0
Planar_Distance_Units: METERS
Geodetic_Model:
Horizontal_Datum_Name: Unknown
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.4
Denominator_of_Flattening_Ratio: 294.98


Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: NAWQA_HUC.PAT
Entity_Type_Definition: area and hydrologic unit code for each polygon
Entity_Type_Definition_Source: 1:250000 quadrangles of Alaska
Attribute:
Attribute_Label: -
Attribute_Definition: area and hydrologic unit code for each polygon
Attribute_Definition_Source: 1:250000 quadrangles of Alaska
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: -
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: AREA
Attribute_Definition: Area of poly/region in square coverage units
Attribute_Definition_Source: Computed
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Positive real numbers
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: PERIMETER
Attribute_Definition: Perimeter of poly/region in coverage units
Attribute_Definition_Source: Computed
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Positive real numbers
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: NAWQA_HUC#
Attribute_Definition: Internal feature number
Attribute_Definition_Source: Computed
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Sequential unique positive integer
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: NAWQA_HUC-ID
Attribute_Definition: User-assigned feature number
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Integer
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: HUC.CODES
Attribute_Definition: 8 digit hydrologic unit code
Attribute_Definition_Source: Interagency Hydrology Committee of Alaska
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value:
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: LABEL
Attribute_Definition: Coded with a nonzero positive number for plotting purposes only
Attribute_Definition_Source:
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value:
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Detailed_Description:
Entity_Type:
Entity_Type_Label: NAWQA_HUC.AAT
Entity_Type_Definition: arc attribute table
Entity_Type_Definition_Source: 1
Attribute:
Attribute_Label: -
Attribute_Definition: arc attribute table
Attribute_Definition_Source: 1
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: -
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: FNODE#
Attribute_Definition: Internal number of from-node
Attribute_Definition_Source: Computed
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Sequential unique positive integer
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: TNODE#
Attribute_Definition: Internal number of to-node
Attribute_Definition_Source: Computed
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Sequential unique positive integer
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: LPOLY#
Attribute_Definition: Internal number of poly to left of arc
Attribute_Definition_Source: Computed
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Sequential unique positive integer
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: RPOLY#
Attribute_Definition: Internal number of poly to right of arc
Attribute_Definition_Source: Computed
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Sequential unique positive integer
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: LENGTH
Attribute_Definition: Length of arc in coverage units
Attribute_Definition_Source: Computed
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Positive real numbers
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: NAWQA_HUC#
Attribute_Definition: Internal feature number
Attribute_Definition_Source: Computed
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Sequential unique positive integer
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: NAWQA_HUC-ID
Attribute_Definition: User-assigned feature number
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Integer
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: LINE
Attribute_Definition: Different numbers correspond to major drainages
Attribute_Definition_Source: Interagency Hydrology Committee for Alaska
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value:
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Overview_Description:
Entity_and_Attribute_Overview:
In nawqa_huc.pat, an attribute HUC.CODES refers to the hydrologic unit number
assigned to the particular polygon. In nawqa_huc.aat, an attribute LINE is a
'tag' for each arc and allows the user to plot the major boundaries if needed.

Entity_and_Attribute_Detail_Citation: Not Available


Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Tim Brabets
Contact_Organization: USGS-WRD
Contact_Position: Hydrologist
Contact_Address:
Address_Type: mailing address
Address: 4230 University Drive, Suite 201
City: Anchorage
State_or_Province: AK
Postal_Code: 99508
Country: USA
Contact_Voice_Telephone: 907-786-7105
Contact_Facsimile_Telephone: 907-786-7150
Contact_Electronic_Mail_Address: tbrabets@usgs.gov
Hours_of_Service: 8:00 - 4:30 AST
Resource_Description: Alaska Geospatial Data Clearinghouse
Distribution_Liability: No liability is assumed
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ARCG ARC/INFO Generate format
Format_Version_Number: 7.0.4
File_Decompression_Technique: gzip
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <URL:https://agdcftp1.wr.usgs.gov/pub/usgs/water/nawqa_huc.tar.gz>
Fees: Free


Metadata_Reference_Information:
Metadata_Date: 19980227
Metadata_Contact:

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: Local Time
Metadata_Security_Information:
Metadata_Security_Classification_System: None
Metadata_Security_Classification: Unclassified
Metadata_Security_Handling_Description: None


AGDC Home | Information | Datasets | Tools | Links | Contacts

Accessibility FOIA Privacy Policies and Notices

USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: https://agdc.usgs.gov/data/usgs/water/metadata/nawqa_huc.html
Page Contact Information: agdcweb@usgs.gov
Page Last Modified: Wednesday, 07-Dec-2016 11:59:00 AKST