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U.S. Geological Survey


Metadata for Major Ecosystems of Alaska

Table of Contents

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


Identification_Information

Citation_Information Originator: U.S. Geological Survey Publication_Date: Title: Digital map file of Major Ecosystems of Alaska map Online_Linkage: <URL:https://agdcftp1.wr.usgs.gov/pub/aklandchar/ecosys/ecosys.e00.gz> Scale_Denominator: 2,500,000

Description Abstract This is a polygon coverage of the Major Ecosystems of Alaska map unit boundaries delineated by the Joint Federal-State Land Use Planning Commission for Alaska in 1973 at 1:2,500,000-scale. Purpose This data will be used primarily to display the location of Major Ecosystems of Alaska at a state-wide scale. It is not recommended for local or regional analysis due to the small scale of this coverage. Supplemental_Information Procedures_Used The original version of this digital coverage was generated by the US Environmental Protection Agency Environmental Research Laboratory, Corvallis, Oregon, around 1991. The procedures used to create this coverage were digitizing the major units from the original map. Revisions Reviews_Applied Related_Spatial_and_Tabular_Data_Sets None. Other_References_Cited Joint-Federal State Land Use Planning Commission, 1973, Major Ecosystems Of Alaska map. U.S. Geological Survey. Scale 1:2,500,000. Notes Time_Period_of_Content Range_of_Dates/Times Beginning_Date: Beginning_Time: Ending_Date: Ending_Time: Currentness_Reference Status Progress: Maintenance_and_Update_Frequency Spatial_Domain Bounding_Coordinates West_Bounding_Coordinate: 154.1292 East_Bounding_Coordinate: -117.3588 North_Bounding_Coordinate: 67.5796 South_Bounding_Coordinate: 48.1909

Keywords Theme Theme_Keyword_Thesaurus: None Theme_Keyword: Major Ecosystems of Alaska Place Place_Keyword_Thesaurus: None Place_Keyword: Alaska Stratum Stratum_Keyword_Thesaurus: None Stratum_Keyword: Temporal Temporal_Keyword_Thesaurus: None Temporal_Keyword:

Access_Constraints Use_Constraints Accuracy is good at 1:2,500,000 or smaller in most cases. Point_of_Contact: See Distribution_Information for contact information.

Data_Set_Credit 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 7.0.3

Cross_Reference Originator: Joint Federal-State Land Use Planning Commission Publication_Date: 1973 Publication_Time: Title: Major Ecosystems of Alaska map Edition: Geospatial_Data_Presentation_Form: map Series_Information Series_Name: Issue_Identification: Publication_Information Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: Scale 1:2,500,000 Online_Linkage: Larger_Work_Citation:


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 Positional_Accuracy Horizontal_Positional_Accuracy Horizontal_Positional_Accuracy_Report:
Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: approx 1000 meters Horizontal_Positional_Accuracy_Explanation: Resolution as reported
Vertical_Positional_Accuracy Vertical_Positional_Accuracy_Report: Lineage: See Supplemental_Information for overview.

Process_Steps

Cloud_Cover


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: 2004 SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 4349 SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains' Point_and_Vector_Object_Count: 2031


Spatial_Reference_Information

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


Entity_and_Attribute_Information

Detailed_Description Entity_Type Entity_Type_Label: Ecosys.PAT Entity_Type_Definition: Polygon Attribute Table Entity_Type_Definition_Source: Attribute: Attribute_Label: AREA Attribute_Definition: Area of polygon 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 polygon 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: Ecosys# 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: Ecosys-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: Class Attribute_Definition: Assigned Major Ecosystem unit number Attribute_Definition_Source: User-defined Attribute_Domain_Values Enumerated_Domain Enumerated_Domain_Value: Enumerated_Domain_Value_Definition Enumerated_Domain_Value_Definition_Source:

Overview_Description Entity_and_Attribute_Overview There is one attribute files associated with this coverage. An a polygon attribute table: DATAFILE NAME: ECOSYS.PAT 11 ITEMS: STARTING IN POSITION 1 COL ITEM NAME WDTH OPUT TYP N.DEC ALTERNATE NAME 1 AREA 4 12 F 3 5 PERIMETER 4 12 F 3 9 ECOSYS# 4 5 B - 13 ECOSYS-ID 4 5 B - 17 CLASS 3 3 I - Class is an assigned unit number from 0-10. 0 1 Alpine Tundra 2 Moist Tundra 3 Wet Tundra 4 High Brush 5 Low Brush - Muskeg - Bog 6 Lowland Spruce - Hardwood Forest 7 Bottomland Spruce - Popular Forest 8 Upland Spruce - Hardwood Forest 9 Coastal Western Hemlock - Sitka Spruce 10 Water Entity_and_Attribute_Detail_Citation: Not Available


Distribution_Information

Distributor
    Contact_Person_Primary
        Contact_Person: 
        Contact_Organization: U.S. Geological Survey, EROS Alaska Field Office
    Contact_Position:
 
    Contact_Address
        Address_Type: mailing address
        Address:4230 University Drive
        City: Anchorage
        State_or_Province: AK
        Postal_Code: 99508-4664
        Country: USA
 
    Contact_Voice_Telephone: 907-786-7020
 
 
    Contact_Facsimile_Telephone: 907-786-7036
    Contact_Electronic_Mail_Address:  webmaster@www-wros-afo.wr.usgs.gov
 
    Hours_of_Service: 9:00-5:00pm AST
 
    Contact_Instructions: May contact thru email
 
Resource_Description:
 
Distribution_Liability: No liablity is assumed.  Although these data
      been processed successfully on a computer system at the U.S. Geological
      Survey, U.S. Department of the Interior, no warranty expressed or
      implied is made by the Geological Survey regarding the utility of the
      data on any other system, nor shall the act of distribution constitute
      any such warranty.
 
Standard_Order_Process
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: ARCE
          Files are compressed with the GNU-zip public-domain file
          compression utility.
          Warning Your browser may automatically uncompress the files
          when they are transferred.
      Digital_Transfer_Option:
        Ecosys is available via Internet!
        Select the "Load to Local Disk" option on your client software
        and choose 
        Arc/INFO Export

Technical_Prerequisites: A network browser, such as Mosaic or Netscape, is required

Available_Time_Period
    Beginning_Date/Time: 1997
    Ending_Date/Time: present
 

Metadata_Reference_Section

Metadata_Date: 19970220 Metadata_Contact: ebinnian 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

Metadata Last Updated: 97-02-20.18:58:53.Thu


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