National Land Cover Data

Metadata also available as

Metadata:


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Publication_Date: Unpublished Material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.ornl.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

Generated by mp version 2.8.6 on Mon Jan 10 14:04:23 2005