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Metadata for AKSTHU8X
Identification_Information
Abstract
Purpose
Supplemental Information
Data_Quality_Information
Spatial_Data_Organization_Information
Entity_and_Attribute_Information
Detailed Description
Overview
Distribution_Information
Metadata_Reference_Section
Citation_Information
Originator: Dean Oman
Publication_Date: 2001
Title: State and 8 Digit Hydrologic Unit Boundaries for Alaska
Geospatial_Data_Presentation_Format: Arc/Info
Publication_Information
Publication_Place: Washington, DC
Publisher: NRCS
Other_Citation_Details: NRI Map Room coverage
Online_Linkage: ftp://ftp-fc.sc.egov.usda.gov/NHQ/pub/land/arc_export/aksthu8x.e00.zip
Description
Abstract
State and 8 digit hydrologic unit boundaries for Alaska.
Purpose
This coverage is intended as a basemap for national level analysis.
Supplemental_Information
Procedures_Used
This coverage contains the 8 digit hydrologic unit boundaries for Alaska.
The coverage was downloaded by Iowa State University from USGS
(http://water.usgs.gov/lookup/getspatial?huc250k).
NRCS clipped the coverage to a shoreline created by the National
Center for Resource Innovations (NCRI). NCRI derived the
shoreline from 1:2,000,000 scale USGS Digital Line Graph (DLG) files.
This was joined with state boundaries using UNION. State boundaries
where derived from a county coverage using RECLASS. Islands were
removed from this coverage to optimize its use for dot density maps.
Revisions
This coverage was last updated in 2001.
Reviews_Applied_to_Data
This coverage has received no formal review.
Related_Spatial_and_Tabular_Data_Sets
Other NRI Map Room basemap coverages include counties and Federal lands,
derived from USGS coverages, and a Major Land Resource Areas (MLRA) coverage
derived from the MLRA map in Agricultural Handbook 296. These are intended to
have the same shoreline and outer boundaries, although this has not been
thoroughly verified.
References_Cited
NRCS National Headquarters, Resources Inventory and Assessment Division.
Notes
Time_Period_of_Content
Currentness_Reference
This coverage was last updated in 2001.
Status
Progress: complete
Maintenance_and_Update_Frequency
as needed
Spatial_Domain
Bounding_Coordinates
West_Bounding_Coordinate: -175.25437721
East_Bounding_Coordinate: -117.38124568
North_Bounding_Coordinate: 67.77918845
South_Bounding_Coordinate: 51.73468806
Keywords
Theme
Theme_Keyword_Thesaurus: None
Theme_Keyword: Hydrologic Units
Place
Place_Keyword_Thesaurus: None
Place_Keyword: Alaska
Stratum
Stratum_Keyword_Thesaurus: None
Stratum_Keyword:
Temporal
Temporal_Keyword_Thesaurus: None
Temporal_Keyword:
Access_Constraints
none
Use_Constraints
This coverage is designed for national, regional, and state level analysis.
It may not be appropriate for use at larger scales. This map does not meet National Map Accuracy Standards.
Point_of_Contact: See Distribution_Information for contact information.
Data_Set_Credit
USGS
Mark Rogers, ISU, mtrogers@iastate.edu
Dean Oman at dean.oman@wdc.usda.gov
the RIAD staff at nri@wdc.usda.gov
George Muehlbach, NCRI, made the shoreline.
Security_Information
Security_Classification_System: None
Security_Classification: UNCLASSIFIED
Security_Handling_Description: None
Native_Data_Set_Environment: SunOS UNIX, ARC/INFO version 7.2.1
Cross_Reference
Originator: Dean Oman
Publication_Date: 2001
Publication_Time:
Title: State and 8 Digit Hydrologic Unit Boundaries for Alaska
Edition:
Geospatial_Data_Presentation_Form: Arc/Info
Series_Information
Series_Name:
Issue_Identification:
Publication_Information
Publication_Place: Washington, DC
Publisher: NRCS
Other_Citation_Details: NRI Map Room coverage
Online_Linkage: ftp://ftp-fc.sc.egov.usda.gov/NHQ/pub/land/arc_export/aksthu8x.e00.zip
Larger_Work_Citation:
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 topology present.
Completeness_Report
complete
Positional_Accuracy
Horizontal_Positional_Accuracy
Horizontal_Positional_Accuracy_Report:
Vertical_Positional_Accuracy
Vertical_Positional_Accuracy_Report:
Lineage: See Supplemental_Information for overview.
Process_Steps
Process_Step
Process_Description: JVRANA DISSOLVE AK AK1A MAJOR1
Source_Used_Citation_Abbreviation:None
Process_Date: 19970113
Process_Time: 1031
Source_Produced_Citation_Abbreviation: None
Process_Step
Process_Description: DOMAN COPY AK1A /GIS/ARC/PERMANENT/ST/AKST
Source_Used_Citation_Abbreviation:None
Process_Date: 19970205
Process_Time: 810
Source_Produced_Citation_Abbreviation: None
Process_Step
Process_Description: DOMAN COPY /GIS/ARC/PERMANENT/ST/AKST AKST
Source_Used_Citation_Abbreviation:None
Process_Date: 19971014
Process_Time: 1508
Source_Produced_Citation_Abbreviation: None
Process_Step
Process_Description: DOMAN INTERSECT AKST AKHU8 AKSTHU8 POLY
Source_Used_Citation_Abbreviation:None
Process_Date: 19971014
Process_Time: 1721
Source_Produced_Citation_Abbreviation: None
Process_Step
Process_Description: DOMAN RESELECT AKSTHU8 AKSTHU8X POLY AKSTHU8SEL
Source_Used_Citation_Abbreviation:None
Process_Date: 19971015
Process_Time: 1234
Source_Produced_Citation_Abbreviation: None
Process_Step
Process_Description: DOMAN COPY AKSTHU8X /GIS/ARC/PERMANENT/STHU8X/AKSTHU8X
Source_Used_Citation_Abbreviation:None
Process_Date: 19971015
Process_Time: 1255
Source_Produced_Citation_Abbreviation: None
Process_Step
Process_Description: KMUSSER EXPORT COVER AKSTHU8X ~/AKSTHU8X
Source_Used_Citation_Abbreviation:None
Process_Date: 19990719
Process_Time: 947
Source_Produced_Citation_Abbreviation: None
Process_Step
Process_Description: KMUSSER DOCUMENT AKSTHU8X COPY /GIS/ARC/PERMANENT/HU8/AKHU8 KMUSSER
Source_Used_Citation_Abbreviation:None
Process_Date: 19990719
Process_Time: 1018
Source_Produced_Citation_Abbreviation: None
Process_Step
Process_Description: KMUSSER DOCUMENT AKSTHU8X UPDATE KMUSSER
Source_Used_Citation_Abbreviation:None
Process_Date: 19990719
Process_Time: 1107
Source_Produced_Citation_Abbreviation: None
Process_Step
Process_Description: KMUSSER EXPORT COVER AKSTHU8X AKSTHU8X
Source_Used_Citation_Abbreviation:None
Process_Date: 20020107
Process_Time: 1516
Source_Produced_Citation_Abbreviation: None
Process_Step
Process_Description: KMUSSER DOCUMENT AKSTHU8X DELETE KMUSSER
Source_Used_Citation_Abbreviation:None
Process_Date: 20020107
Process_Time: 1628
Source_Produced_Citation_Abbreviation: None
Process_Step
Process_Description: KMUSSER DOCUMENT AKSTHU8X COPY /GIS/ARC/PERMANENT/HU8/AKHU8 KMUSSER
Source_Used_Citation_Abbreviation:None
Process_Date: 20020107
Process_Time: 1630
Source_Produced_Citation_Abbreviation: None
Process_Step
Process_Description: KMUSSER DOCUMENT AKSTHU8X UPDATE KMUSSER
Source_Used_Citation_Abbreviation:None
Process_Date: 20020107
Process_Time: 1651
Source_Produced_Citation_Abbreviation: None
Cloud_Cover
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: 136
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 42644
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains'
Point_and_Vector_Object_Count: 137
Horizontal_Coordinate_System_Definition
Planar
Map_Projection:
Map_Projection_Name: ALBERS
Longitude_of_Central_Meridian: -154
Latitude_of_Projection_Origin: 50
Latitude_of_First_Standard_Parallel: 55
Latitude_of_Second_Standard_Parallel: 65
False_Easting: 0.00000
False_Northing: 0.00000
Geodetic Model
Horizontal_Datum_Name:
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6,378,206.4
Denominator_of_Flattening: 294.98
Detailed_Description
Entity_Type
Entity_Type_Label: AKSTHU8X.PAT
Entity_Type_Definition: 8 Digit Hydrologic Unit Codes
Entity_Type_Definition_Source: USGS
Attribute:
Attribute_Label: -
Attribute_Definition: 8 Digit Hydrologic Unit Codes
Attribute_Definition_Source: USGS
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: AKSTHU8X#
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: AKSTHU8X-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: HU8
Attribute_Definition: 8 Digit Hydrologic Unit Code
Attribute_Definition_Source: USGS
Attribute_Domain_Values
Enumerated_Domain
Enumerated_Domain_Value:
Enumerated_Domain_Value_Definition
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: HU6
Attribute_Definition: 6 DIgit Hydrologic Unit Code
Attribute_Definition_Source: USGS
Attribute_Domain_Values
Enumerated_Domain
Enumerated_Domain_Value:
Enumerated_Domain_Value_Definition
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: NAME
Attribute_Definition: Hydrologic Unit Name
Attribute_Definition_Source: USGS
Attribute_Domain_Values
Enumerated_Domain
Enumerated_Domain_Value:
Enumerated_Domain_Value_Definition
Enumerated_Domain_Value_Definition_Source:
Overview_Description
Entity_and_Attribute_Overview
Attributes include 8 digit and 6 digit hydrologic unit codes.
Entity_and_Attribute_Detail_Citation: Not Available
Metadata_Date: 19020107
Metadata_Contact:
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: 19940608
Metadata_Time_Convention: Local Time
Metadata_Security_Information:
Metadata_Security_Classification_System: None
Metadata_Security_Classification: UNCLASSIFIED
Metadata_Security_Handling_Description: None
Last modified: 02-01-07.16:55:09.Mon
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