United States Department of Agriculture
Natural Resources Conservation Service		 Go to Accessibility Information
Skip to Page Content




Metadata for US48MLRA

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: Dean Oman
    Publication_Date: 2002
    Title: Cartographer
    Publication_Information
        Publication_Place: Washington DC
        Publisher: USDA/NRCS/NHQ/RAD
    Other_Citation_Details: NRI Map Room Coverage
    Online_Linkage: ftp-fc.sc.egov.usda.gov/NHQ/pub/land/arc_export/us48mlra.e00.zip


Description  
    Abstract
    Major Land Resource Area (MLRA) boundaries for the conterminous United States.
     
     
    Purpose
    This coverage is intended as a basemap for US national level natural resource
    analysis.
     
     
Supplemental_Information
    Procedures_Used
    This coverage contains the Major Land Resource Area (MLRA) boundaries for the
    conterminous United States.  MLRA boundaries were revised in the mid-1990s from
    earlier versions established in the 1970s and 1980s by the U.S. Department of
    Agriculture (USDA) Natural Resources Conservation Service (NRCS), formerly the
    Soil Conservation Service (SCS).  The revised MLRA boundary coverage was
    digitized at the Soil Survey Center in Lincoln, Nebraska, the most recent
    version of which was completed in January of 1997.  Buffer polygons were added
    to the U.S. national boundaries and shoreline by NRCS National Cartography and
    Geospatial Center in Fort Worth, Texas, for use with NRCS National Resources
    Inventory (NRI) digitized sample sites.  These buffered boundaries were later
    removed by the NRCS National Headquarters office, Resources Inventory and Assessment Division
    (RAD) in May 2000, and the national shoreline and outer boundaries were made
    to conform to standard boundaries established for NRI Map Room series
    maps (http://www.nrcs.usda.gov/technical/land/).  Those standard U.S. national
    boundaries and shoreline are based on 1:2,000,000 scale 8-digit hydrologic
    unit coverage obtained from the U.S. Geological Survey, circa 1990, and were
    edited by the National Center for Resource Innovations (NCRI) in Washington,
    DC, and subsequently by NRCS/NHQ/RAD.
     
     
    Revisions
    The coverage was last updated in 2002.
     
     
    Reviews_Applied_to_Data
    This coverage has received no formal review.
     
     
    Related_Spatial_and_Tabular_Data_Sets
    This MLRA coverage is intended to have the same shoreline and outer boundaries
    as other coverages available in the NRCS NRI Map Room series (available
    online at http://www.nrcs.usda.gov/technical/land/), although their precise
    correspondance has not been thoroughly verified.  These coverages include
    counties, 8-digit hydrologic units, and Federal lands, derived from USGS
    coverages, circa 1990.
     
     
    References_Cited
    NRCS National Headquarters, Resources Inventory and Assessment Division (RAD).
    See USDA Agriculture Handbook 296 "Land Resource Regions and Major Resource
    Areas of the United States" for a look at an earlier version of the map and
    an explanation of MLRA and LRR designations.
     
     
    Notes
     
     
Time_Period_of_Content
    Currentness_Reference
    This coverage was last updated in 2002.
     
     
Status
    Progress:  
    Maintenance_and_Update_Frequency
    Not established.
     
     
Spatial_Domain
    Bounding_Coordinates
    West_Bounding_Coordinate: -127.87164915
    East_Bounding_Coordinate: -65.35636029
    North_Bounding_Coordinate: 48.24334409
    South_Bounding_Coordinate: 22.87750257


Keywords
    Theme
        Theme_Keyword_Thesaurus: None
        Theme_Keyword:  
    Place
        Place_Keyword_Thesaurus: None
        Place_Keyword:  United States, conterminous 48 states
    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 or may not be appropriate for use at larger scales.  This map does not meet National Map Accuracy Standards.  An improved version
of the currently established MLRA lines is in development.
 
 
Use_Constraints
 
 


Data_Set_Credit
Sharon Waltman (swaltman@nssc.nrcs.usda.gov), USDA/NRCS National Soil Survey Cen
boundary lines, excluding the U.S. national outline and lines immediately
attached to it, which were replaced by later edits.
 
Kevin Grantham, USDA/NRCS National Cartographic and Geospatial Center added
buffer polygons to the U.S. national boundaries.
 
Dean Oman (dean.oman@wdc.usda.gov), USDA/NRCS National Headquaters, Resources Inventory and Assessment Division, replaced the U.S. national shoreline and outer boundaries
(including buffer polygons added by Kevin Grantham) with boundaries
established for NRI Map Room series maps.
(http://www.nrcs.usda.gov/technical/land/)
 
George Muehlbach, National Center for Resource Innovations (NCRI), Washington,
DC, made the initial shoreline and national boundary adjustments to the
1:2,000,000 scale coverages obtained from the United States Geological Survey,
which also serve as the shoreline and outer national boundaries for this MLRA
coverage.
 
 
 
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: 2002
    Publication_Time: 
    Title: Major Land Resource Area Boundaries for the Conterminous United States
    Edition: 
    Geospatial_Data_Presentation_Form: 
    Series_Information
        Series_Name: 
        Issue_Identification: 
    Publication_Information
        Publication_Place: Washington
        Publisher: USDA/NRCS/NHQ/RAD
    Other_Citation_Details: Reviewed by USDA/NRCS/NSSC
    Online_Linkage: ftp-fc.sc.egov.usda.gov/NHQ/pub/land/arc_export/us48mlra.e00.zip
    Larger_Work_Citation: 


Cross_Reference
    Originator: 
    Publication_Date: 
    Publication_Time: 
    Title: 
    Edition: 
    Geospatial_Data_Presentation_Form: 
    Series_Information
        Series_Name: 
        Issue_Identification: 
    Publication_Information
        Publication_Place: 
        Publisher: 
    Other_Citation_Details: 
    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 topology present.


Completeness_Report
 
 
Positional_Accuracy 
    Horizontal_Positional_Accuracy
        Horizontal_Positional_Accuracy_Report:
         
         


        Quantitative_Horizontal_Positional_Accuracy_Assessment:
            Horizontal_Positional_Accuracy_Value: meters
            Horizontal_Positional_Accuracy_Explanation:  Resolution as reported


    Vertical_Positional_Accuracy
        Vertical_Positional_Accuracy_Report:
         
         
Lineage: See Supplemental_Information for overview.


Process_Steps
    Process_Step
    Process_Description: DOMAN UNION US48MLRA97TMP ../OUT/US48OUT US48MLRA2INT 0.001
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000420 
    Process_Time:  1004
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN BUILD US48MLRA2INT LINE
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000420 
    Process_Time:  1004
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN IDEDIT US48MLRA2INT LINE
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000420 
    Process_Time:  1004
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN BUILD US48MLRA2INT LINE
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000420 
    Process_Time:  1004
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN ELIMINATE US48MLRA2INT US48MLRA2 NOKEEPEDGE POLY
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000421 
    Process_Time:   737
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN ARCEDIT /GIS/ARC/PERMANENT/MLRA97/US48MLRA2
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000421 
    Process_Time:  1356
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN ARCEDIT /GIS/ARC/PERMANENT/MLRA97/US48MLRA3
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000421 
    Process_Time:  1400
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN ARCEDIT /GIS/ARC/PERMANENT/MLRA97/US48MLRA3
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000421 
    Process_Time:  1605
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN RENAME US48MLRA3 US48MLRA
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000427 
    Process_Time:   824
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: EXTERNALALL
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000427 
    Process_Time:   934
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN ARCEDIT /GIS/ARC/PERMANENT/MLRA/US48MLRA
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000614 
    Process_Time:  1620
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN ARCEDIT /GIS/ARC/PERMANENT/MLRA/US48MLRA
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000622 
    Process_Time:  1646
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN EXPORT COVER US48MLRA US48MLRA
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000918 
    Process_Time:  1053
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN PROJECTCOPY COVER ../MLRA92/US48MLRA92 COVER US48MLRA
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000918 
    Process_Time:  1105
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN PROJECTDEFINE COVER US48MLRA
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000918 
    Process_Time:  1120
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN PROJECTDEFINE COVER US48MLRA
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000918 
    Process_Time:  1121
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN PROJECTDEFINE COVER US48MLRA
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000918 
    Process_Time:  1125
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN PROJECTDEFINE COVER US48MLRA
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000918 
    Process_Time:  1126
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN   DOCUMENT US48MLRA CREATE DOMAN
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000918 
    Process_Time:  1513
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN   DOCUMENT US48MLRA UPDATE DOMAN
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000919 
    Process_Time:  1314
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN   DOCUMENT US48MLRA UPDATE DOMAN
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000919 
    Process_Time:  1524
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN   DOCUMENT US48MLRA UPDATE DOMAN
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000919 
    Process_Time:  1538
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN   DOCUMENT US48MLRA UPDATE DOMAN
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000919 
    Process_Time:  1543
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN EXPORT COVER US48MLRA US48MLRA
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000919 
    Process_Time:  1555
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: DOMAN EXPORT COVER US48MLRA US48MLRA
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20000919 
    Process_Time:  1602
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: KMUSSER   DOCUMENT US48MLRA UPDATE KMUSSER
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20020108 
    Process_Time:  1211
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: KMUSSER   DOCUMENT US48MLRA UPDATE KMUSSER
    Source_Used_Citation_Abbreviation:None
    Process_Date:  20020108 
    Process_Time:  1256
    Source_Produced_Citation_Abbreviation: None


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: 1539
        SDTS_Point_and_Vector_Object_Type: String
        Point_and_Vector_Object_Count: 6841
        SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains'
        Point_and_Vector_Object_Count:  1540

Spatial_Reference_Information 

Horizontal_Coordinate_System_Definition 
    Planar
        Map_Projection:
        Map_Projection_Name:  ALBERS
        Longitude_of_Central_Meridian: -96
        Latitude_of_Projection_Origin: 23
        Latitude_of_First_Standard_Parallel: 29.5
        Latitude_of_Second_Standard_Parallel: 45.5
        False_Easting:  0.00000
        False_Northing:  0.00000
    Geodetic Model
        Horizontal_Datum_Name: North American Datum of 1927
                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: US48MLRA.PAT
    Entity_Type_Definition: Major Land Resource Areas for the Conterminous 48 States
    Entity_Type_Definition_Source: USDA/NRCS/NHQ/RAD
    Attribute:
        Attribute_Label: -
        Attribute_Definition: Major Land Resource Areas for the Conterminous 48 States
        Attribute_Definition_Source: USDA/NRCS/NHQ/RAD
        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: US48MLRA#
        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: US48MLRA-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: MLRA
        Attribute_Definition: Major Land Resource Area code
        Attribute_Definition_Source: 
        Attribute_Domain_Values
            Enumerated_Domain
                Enumerated_Domain_Value: 
                Enumerated_Domain_Value_Definition
                Enumerated_Domain_Value_Definition_Source:
    Attribute:
        Attribute_Label: MLRANAME
        Attribute_Definition: Name of Major Land Resource Area
        Attribute_Definition_Source: 
        Attribute_Domain_Values
            Enumerated_Domain
                Enumerated_Domain_Value: 
                Enumerated_Domain_Value_Definition
                Enumerated_Domain_Value_Definition_Source:
    Attribute:
        Attribute_Label: MO
        Attribute_Definition: 
        Attribute_Definition_Source: 
        Attribute_Domain_Values
            Enumerated_Domain
                Enumerated_Domain_Value: 
                Enumerated_Domain_Value_Definition
                Enumerated_Domain_Value_Definition_Source:
    Attribute:
        Attribute_Label: LRR
        Attribute_Definition: Land Resource Region code
        Attribute_Definition_Source: 
        Attribute_Domain_Values
            Enumerated_Domain
                Enumerated_Domain_Value: 
                Enumerated_Domain_Value_Definition
                Enumerated_Domain_Value_Definition_Source:
    Attribute:
        Attribute_Label: LRRNAME
        Attribute_Definition: Land Resource Region name
        Attribute_Definition_Source: 
        Attribute_Domain_Values
            Enumerated_Domain
                Enumerated_Domain_Value: 
                Enumerated_Domain_Value_Definition
                Enumerated_Domain_Value_Definition_Source:


 Overview_Description 
    Entity_and_Attribute_Overview 
    US48MLRA.PAT, polygon attribute table of US48MLRA, using ARC/INFO software.
     
    AREA:         Area of poly/region in square coverage units.
    PERIMETER:    Perimeter of poly/region in coverage units.
    US48MLRA#:    Internal feature number.
    US48MLRA-ID:  User-assigned feature number.
    MLRA:         Major Land Resource Area designation code.
    MLRANAME:     Major Land Resource Area designation name.
    MO:
    LRR:          Land Resource Region designation code.
    LRRNAME:      Land Resource Region designation name.
     
     
    Entity_and_Attribute_Detail_Citation: Not Available

Distribution_Information 



Metadata_Reference_Section
Metadata_Date: 19020108
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: 02-01-08.13:31:00.Tue

< Back to GIS Coverages 

< Back to About Our Maps