National Land Cover Data

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: United States Geological Survey

Publication_Date: Unpublished Material

Title: National Land Cover Data

Edition: 01

Geospatial_Data_Presentation_Form: raster digital data

Other_Citation_Details:

Classification and processing of the orginal remote sensing products was done by the Multi-Resolution Land Characterization Consortium and EROS Data Center (U.S. Geological Survey). The Consortium includes the Environmental Monitoring and Assessment Program (U.S. EPA), Gap Analysis Program (USGS), National Water Quality Assessment Program (USGS), Coastal Change Analysis Program (NOAA), North American Landscape Characterization (USGS and EPA), and the Remote Sensing Applications Center (U.S. Forest Service).

Online_Linkage: <http://landcover.usgs.natllandcover.asp>

Description:

Abstract:

This data set is one complete raster coverage of the USGS National Land Cover Data (NLCD). The NLCD is a 21-class land cover classification of the entire United States. It is derived from early to mid-1990s Landsat Thematic Mapper satellite data. A complete description of this data can found at <http://landcover.usgs.gov/natllandcover.asp>.

Purpose:

The NLCD data is distributed by the USGS EROS Data Center for each U.S. state. The data distributed here represents the processing of State files into one contiguous raster cover file for the United States. The final raster coverage is intended to be used in spatial analyses for the entire U.S. Individual State coverages can be downloaded separately from <http://landcover.usgs.gov/natllandcover.asp>

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: December 13, 2004

Time_of_Day: 2:16pm

Currentness_Reference: publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -127.982673

East_Bounding_Coordinate: -65.225464

North_Bounding_Coordinate: 51.652449

South_Bounding_Coordinate: 22.846802

Keywords:

Theme:

Theme_Keyword: Land Cover

Theme_Keyword: Remote Sensing

Theme_Keyword: United States

Theme_Keyword: LandsatTM

Access_Constraints:

The user is encouraged and expected to read all documentation provided by the USGS EROS data center provided with the original State-level NLCD product. This documentation covers all details regarding orginal processing of satellite data and cautionary notes associated with the use of this data. Please see documentation at <http://landcover.usgs.gov/natllandcover.asp> for any access constraints.

Use_Constraints:

Please see documentation at <http://landcover.usgs.gov/natllandcover.asp> for any use constraints.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Data_Set_Credit: USGS and the Multi-Resolution Land Characterization Consortium

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535

Data_Quality_Information:

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: USGS

Title: National Land Cover Data

Process_Step:

Process_Description:

State files were downloaded from EROS Data Center (EDC) in ASCII format. ASCII files were decompressed and imported into ArcInfo Workstation v.8.3 in BIL format. Header files (.hdr) were developed for each respective BIL file prior to importing. Header file development was based on information provided in the EDC metadata for each State file. Following file import, each file was projected according to EDC metadata information. The original projection was Albers Conical Equal Area, and this projection ws maintained throughout processing of all state files. Files were reclassified to change value "0" to "no data". Files were merged into two large raster coverages representing the East and West United States. Merging of these files was not possible because of the 2GB file limit with ArcGIS v.8.x. Union of the final two files was completed using the Mosaic tool in ArcGIS v.9. At the time of this processing, the Mosaic tool within ArcTools, ArcDesktop v.9 was the only ESRI product capable of working with two or more files exceeding a file size of 2GB.

Source_Used_Citation_Abbreviation: C:\GISDATA\NLCD\merge\nlcd92

Process_Date: December 2004

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Tristram O. West

Contact_Organization: Oak Ridge National Laboratory

Contact_Position: Research Scientist

Contact_Address:

Address_Type: mailing address

Address: P.O. Box 2008

City: Oak Ridge

State_or_Province: TN

Postal_Code: 37831-6290

Country: USA

Contact_Voice_Telephone: 865-574-7322

Contact_Electronic_Mail_Address: westto@ornl.gov

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 96995

Column_Count: 154264

Vertical_Count: 1

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: Albers Conical Equal Area

Albers_Conical_Equal_Area:

Standard_Parallel: 29.500000

Standard_Parallel: 45.500000

Longitude_of_Central_Meridian: -96.000000

Latitude_of_Projection_Origin: 23.000000

False_Easting: 0.000000

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 30.000000

Ordinate_Resolution: 30.000000

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: D_GRS_1980

Ellipsoid_Name: Geodetic Reference System 80

Semi-major_Axis: 6378137.000000

Denominator_of_Flattening_Ratio: 298.257222

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: National Land Cover Data

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.

Attribute:

Attribute_Label: Value

Attribute:

Attribute_Label: Count

Attribute:

Attribute_Label: Count

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Carbon Dioxide Information and Analysis Center

Resource_Description: Downloadable Data

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Transfer_Size: -645.467

Metadata_Reference_Information:

Metadata_Date: 20050110

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Oak Ridge National Laboratory

Contact_Address:

Address_Type: mailing address

Address: P.O. Box 2008

City: Oak Ridge

State_or_Province: TN

Postal_Code: 37831-63335

Contact_Voice_Telephone: 865-574-3645

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://cdiac.ess-dive.lbl.gov>

Profile_Name: Carbon Dioxide Information and Analysis Center

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile