Identification_Information: Citation: Citation_Information: Originator: Tom Kress Title: Land Cover Publication_Date: Unpublished material Geospatial_Data_Presentation_Form: Raster digital data Description: Abstract: This is a raster dataset that portrays North America Land Cover characteristics. This dataset was created from North America land cover data obtained in January, 1998 from the Earth Resources Observation Systems (EROS) Data Center Distributed Active Archive Center (EDC DAAC). The North America land cover data base is one portion of a global land cover characteristics data base that is being developed on a continent-by-continent basis. All continents in the global data base have 1-km nominal spatial resolution, and are based on 1-km AVHRR data spanning April 1992 through March 1993. Each continental data base has unique elements that are based on the salient geographic aspects of the specific continent. In addition, a core set of derived thematic maps produced through the aggregation of seasonal land cover regions are included in each continental data base. Purpose: This dataset was created to depict North American land cover characteristics for the Mineral Resources On-Line Spatial Data web site. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1992 Ending_Date: 1993 Currentness_Reference: Publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -180.0 East_Bounding_Coordinate: 180.0 North_Bounding_Coordinate: 89.0 South_Bounding_Coordinate: -2.0 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: North America Land Cover Characteristics Place: Place_Keyword_Thesaurus: None Place_Keyword: North America Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: April, 1992 through March, 1993 Access_Constraints: None Use_Constraints: The U.S. Geological Survey makes no warranties related to the accuracy of the data and users are required to determine the suitability of use for any particular purpose. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Tom Kress Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: 12201 Sunrise Valley Dr. City: Reston State_or_Province: VA Postal_Code: 20192 Country: USA Contact_Voice_Telephone: 703 648-6328 Contact_Electronic_Mail_Address: thkress@usgs.gov Native_Data_Set_Environment: ERDAS (ver 8.2) ArcInfo 7.1.1 Windows NT 4.0 (SP3) ArcView 3.0a Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The exact attribute accuracy of this data set is unknown since a formal FDGC metadata document was not completed. Please refer to: http://edcwww.cr.usgs.gov/landdaac/glcc/nadoc1_2.html for additional information. Logical_Consistency_Report: None Completeness_Report: None of the 1-km AVHRR data was omitted. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Earth Resources Observation Systems (EROS) Data Center Distributed Active Archive Center (EDC DAAC). Publication_Date: 1997 Title: North America Land Cover Geospatial_Data_Presentation_Form: raster digital data Online_Linkage: The North Data are distributed as compressed and uncompressed single-band images. The files can be downloaded from the EDC Distributed Active Archive Center (DAAC) World Wide Web site: (http://edcwww.cr.usgs.gov/landdaac/glcc/na_int.html). Type_of_Source_Media: The North America land cover characteristics data are in a flat, headerless raster format. Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1992 Ending_Date: 1993 Source_Currentness_Reference: Publication date Source_Contribution: The North America land cover data base is one portion of a global land cover characteristics data base that is being developed on a continent-by-continent basis. All continents in the global data base share the same map projections (Interrupted Goode Homolosine and Lambert Azimuthal Equal Area), have 1-km nominal spatial resolution, and are based on 1-km AVHRR data spanning April 1992 through March 1993. Each continental data base has unique elements that are based on the salient geographic aspects of the specific continent. In addition, a core set of derived thematic maps produced through the aggregation of seasonal land cover regions are included in each continental data base. These are: •Global Ecosystems (Olson, 1994a, 1994b) •IGBP Land Cover Classification (Belward, 1996) •U.S. Geological Survey Land Use/Land Cover System (Anderson and others, 1976) •Simple Biosphere Model (Sellers and others, 1986) •Simple Biosphere 2 Model (Sellers and others, 1996) •Biosphere-Atmosphere Transfer Scheme (Dickinson and others,1986). For a description of the methodology for the global data base, see the global readme file found under the EROS Data Center DAAC home page (http://edcwww.cr.usgs.gov/landdaac/glcc/glcc.html). Source_Citation_Abbreviation: nausgs1_21.img.gz Process_Step: Process_Description: A Land Cover ArcInfo GRID dataset was created using the following process: (1) The North America land cover characteristics data (version 1.2) was downloaded in a flat, headerless raster format. The data was an uncompressed single-band image in a binary file. The pixel values correspond to class numbers defined in the appropriate land cover classification scheme legend. The Lambert Azimuthal Equal Area image was downloaded having the following parameters: The data dimensions of the Lambert Azimuthal Equal Area projection for the North America land cover characteristics data set are 8,996 lines (rows) and 9,223 samples (columns) resulting in a data set size of approximately 83 megabytes for 8-bit (byte) images. Projection Type: Lambert Azimuthal Equal Area Units of Measure: meters Pixel Size: 1000 meters Radius of sphere: 6370997 m Longitude of origin: 100 00 00 W Latitude of origin: 50 00 00 N False easting: 0.0 False northing: 0.0 XY corner coordinates (center of pixel) in projection units (meters): Lower left: ( -4487000, -4515000) Upper left: ( -4487000, 4480000) Upper right: ( 4735000, 4480000) Lower right: ( 4735000, -4515000) (2) Utilizing ERDAS (Version 8.2), imported using binary file option. Defined Image Info: Pixel size: 1000 + Lambert Azimuthal Equal Area parameters Exported as ERDAS LAN file. (3) Created GRID by imported LAN file into ArcInfo (Version 7.1.1) using Imagegrid command. (4) Projected GRID from Lambert Azimuthal to Albers (5) Imported into ArcView as ArcInfo GRID file and created ArcView legend file to approximate colors used for Land Cover graphic on EOS web site. Process_Date: 1998 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Tom Kress Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: 12201 Sunrise Valley Dr. City: Reston State_or_Province: VA Postal_Code: 20192 Country: USA Contact_Electronic_Mail_Address: thkress@usgs.gov Contact_Voice_Telephone: 703-648-6328 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: raster Raster_Object_Information: Raster_Object_Type: Grid Cell Row_Count: 9774 Column_Count: 10437 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Albers Conical Equal Area Albers_Conical_Equal_Area: Standard_Parallel: 29 30 00 Standard_Parallel: 45 30 00 Longitude_of_Central_Meridian: -96 00 00 Latitude_of_Projection_Origin: 37 30 00 False_Easting: 0.0000 False_Northing: 0.0000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: Ordinate_Resolution: Planar_Distance_Units: kilometer Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6370997 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Earth Resources Observation Systems (EROS) Data Center Distributed Active Archive Center (EDC DAAC). North American Land Cover Characteristics Data Base based on the USGS Land Use/Land Cover Scheme (Anderson and others, 1976). Land Cover Code USGS Land Use/Land Cover System Legend (Modified Level 2) Value Code Description 1 100 Urban and Built-Up Land 2 211 Dryland Cropland and Pasture 3 212 Irrigated Cropland and Pasture 4 213 Mixed Dryland/Irrigated Cropland and Pasture 5 280 Cropland/Grassland Mosaic 6 290 Cropland/Woodland Mosaic 7 311 Grassland 8 321 Shrubland 9 330 Mixed Shrubland/Grassland 10 332 Savanna 11 411 Deciduous Broadleaf Forest 12 412 Deciduous Needleleaf Forest 13 421 Evergreen Broadleaf Forest 14 422 Evergreen Needleleaf Forest 15 430 Mixed Forest 16 500 Water Bodies 17 620 Herbaceous Wetland 18 610 Wooded Wetland 19 770 Barren or Sparsely Vegetated 20 820 Herbaceous Tundra 21 810 Wooded Tundra 22 850 Mixed Tundra 23 830 Bare Ground Tundra 24 900 Snow or Ice Source: Earth Resources Observation Systems (EROS) Data Center Distributed Active Archive Center (EDC DAAC). North American Land Cover Characteristics Data Base based on the USGS Land Use/Land Cover Scheme (Anderson and others, 1976). Entity_and_Attribute_Detail_Citation: Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Tom Kress Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: Mailing address Address: 12201 Sunrise Valley Drive. MS 954 City: Reston State_or_Province: VA Postal_Code: 20192 Country: USA Contact_Voice_Telephone: 703-648-6328 Contact_Electronic_Mail_Address: thkress@usgs.gov Resource_Description: lulcalb Distribution_Liability: The U.S. Geological Survey (USGS) provides this raster data "as is." The USGS makes no guarantee or warranty concerning the accuracy of information contained in the raster data. The USGS further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although this data has been processed successfully on computers at the USGS, no warranty, expressed or implied, is made by the USGS regarding the use of this data on any other system, nor does the fact of distribution constitute or imply any such warranty. Metadata_Reference_Information: Metadata_Date: 19990217 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Tom Kress Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: 12201 Sunrise Valley Dr. City: Reston State_or_Province: VA Postal_Code: 20192 Country: USA Contact_Voice_Telephone: 703-648-6328 Contact_Electronic_Mail_Address: thkress@usgs.gov Metadata_Standard_Name: FDGC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FDGC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: none Metadata_Use_Constraints: none Metadata_Security_Information: Metadata_Security_Classification_System: none Metadata_Security_Classification: Unclassified Metadata_Security_Handling_Description: none