National Land Cover Database Zone 3 Tree Canopy Layer

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: U.S. Geological Survey

Publication_Date: 20040301

Publication_Time: Unknown

Title: National Land Cover Database Zone 3 Tree Canopy Layer

Edition: 1.0

Geospatial_Data_Presentation_Form: remote-sensing image

Series_Information:

Series_Name: None

Issue_Identification: None

Publication_Information:

Publication_Place: Sioux Falls, SD

Publisher: U.S. Geological Survey

Other_Citation_Details:

References:Homer, C., C. Huang, L. Yang, B. Wylie and M. Coan, 2004. Development of a 2001 national land cover database for the United States. Photogrammetric Engineering and Remote Sensing.

Huang, C., L. Yang, B. Wylie, and C. Homer, 2001. A strategy for estimating tree canopy density using Landsat 7 ETM+ and high resolution images over large areas. In: Third International Conference on Geospatial Information in Agriculture and Forestry; November 5-7, 2001; Denver, Colorado. CD-ROM, 1 disk.

The USGS acknowledges the support of Earth Satellite Corporation in development of data in this zone.

Online_Linkage: <http://www.mrlc.gov>

Description:

Abstract:

The National Land Cover Database 2001 tree canopy layer for mapping zone 3 was produced through a cooperative project conducted by the Multi-Resolution Land Characteristics (MRLC) Consortium. The MRLC Consortium is a partnership of federal agencies (www.mrlc.gov), consisting of the U.S. Geological Survey (USGS), the National Oceanic and Atmospheric Administration (NOAA), the U.S. Environmental Protection Agency (EPA), the U.S. Department of Agriculture (USDA), the U.S. Forest Service (USFS), the National Park Service (NPS), the U.S. Fish and Wildlife Service (FWS), the Bureau of Land Management (BLM) and the USDA Natural Resources Conservation Service (NRCS). One of the primary goals of the project is to generate a current, consistent, seamless, and accurate National Land cover Database (NLCD) circa 2001 for the United States at medium spatial resolution. For a detailed definition and discussion on MRLC and the NLCD 2001 products, refer to Homer et al. (2003) and <http://www.mrlc.gov/mrlc2k.asp>.

The NLCD 2001 was created by partitioning the U.S. into mapping zones. A total of 66 mapping zones were delineated within the conterminous U.S. based on ecoregion and geographical characteristics, edgematching features and the size requirement of Landsat mosaics. Mapping zone 3 encompasses a portion of the state of California. Questions about the NLCD mapping zone 3 can be directed to the NLCD 2001 land cover mapping team at the USGS EROS Data Center (EDC), Sioux Falls, SD (605) 594-6151 or mrlc@usgs.gov.

Purpose:

The goal of this project is to provide the Nation with complete, current, and consistent public domain information on its land use and land cover.

Supplemental_Information:

Corner Coordinates (center of pixel, projection meters)Upper Left Corner: -2367970 meters(X), 2608670 meters(Y)Lower Right Corner: -2152150 meters(X), 1914680 meters(Y)Spatial-specific information not available

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19990705

Ending_Date: 20010405

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate:-123.53662078

East_Bounding_Coordinate:-122.35099078

North_Bounding_Coordinate:38.85253177

South_Bounding_Coordinate:38.11069077

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: tree canopy

Theme_Keyword: GIS

Theme_Keyword: U.S. Geological Survey

Theme_Keyword: USGS

Theme_Keyword: digital spatial data

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Category

Theme_Keyword: imageryBaseMapsEarthCover

Place:

Place_Keyword_Thesaurus:

U.S. Department of Commerce, 1995, Countries,dependencies, areas of special sovereignty, and their principal administrative divisions, Federal Information Processing Standard 10-4,): Washington, D.C., National Institute of Standards and Technology

Place_Keyword: United States

Place_Keyword: U.S.

Place_Keyword: US

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Zone 3

Place:

Place_Keyword_Thesaurus:

U.S. Department of Commerce, 1987, Codes for the identification of the States, the District of Columbia and the outlying areas of the United States, and associated areas (Federal Information Processing Standard 5-2): Washington, D.C., National Institute of Standards and Technology

Place_Keyword: California

Place_Keyword: CA

Access_Constraints: None

Use_Constraints: None

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Position: Customer Services Representative

Contact_Address:

Address_Type: mailing and physical address

Address: USGS EROS Data Center

Address: 47914 252nd Street

City: Sioux Falls

State_or_Province: SD

Postal_Code: 57198-0001

Country: USA

Contact_Voice_Telephone: 605/594-6151

Contact_TDD/TTY_Telephone: 605/594-6933

Contact_Facsimile_Telephone: 605/594-6589

Contact_Electronic_Mail_Address: custserv@usgs.gov

Hours_of_Service: 0800 - 1600 CT, M - F (-6h CST/-5h CDT GMT)

Contact_Instructions:

The USGS point of contact is for questions relating to the data display and download from this web site. For questions regarding data content and quality, refer to:<http://www.mrlc.gov/mrlc2k.asp> or email: mrlc@usgs.gov

Data_Set_Credit: U.S. Geological Survey.

Security_Information:

Security_Classification_System: None

Security_Classification: Unclassified

Security_Handling_Description: N/A

Native_Data_Set_Environment:

Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 8.3.0.800

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Regression tree algorithms employed in NLCD 2001 mapping offer a cross-validation option for assessing classification and prediction reliability. Cross-validation can provide relatively reliable estimates for tree canopy predictions if the reference data used for cross-validation are collected based on a statistical valid sampling design. For mapping zone 3 tree canopy modeling, a 5-fold cross-validation was conducted by dividing the entire training data set into 5 subsets of equal size. For each model run, an accuracy estimate was derived using one subset to evaluate the model prediction (with the model developed using the remaining training samples). This process was repeated 5 times. After all 5 runs, an average value of all accuracy estimates and standard errors from the 5 runs were computed. Users should be cautioned that these cross-validation results provide users with only first-order estimates of data quality, and should not be considered a formal accuracy assessment.

Quantitative_Attribute_Accuracy_Assessment:

Attribute_Accuracy_Value: 0

Attribute_Accuracy_Explanation:

The above listed value is the overall accuracy obtained for tree canopy in the cross-validation study for mapping zone 3.

Logical_Consistency_Report:

17 1-m resolution DOQQs across mapping zone 3 were classified into either tree canopy or non-tree canopy areas, and then values summed within each 30 meter Landsat pixel cell to obtain the percentage of tree canopy.

Completeness_Report:

This NLCD product of mapping zone 3 Tree Canopy layer is the version 1 dated 09-01-2003.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report: N/A

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report: N/A

Lineage:

Process_Step:

Process_Description:

The method employed to map tree canopy density for NLCD 2001 consists of three key steps: deriving reference data of tree canopy density from the high spatial resolution images, calibrating density prediction models using reference data and Landsat spectral bands, and extrapolating the developed models spatially to map per-pixel tree canopy density. This method is described in detail in Huang et al. (2001). This approach was applied to mapping zone 3 by Earth Satellite Corporation.

Source_Used_Citation_Abbreviation: Landsat ETM, DOQQ, EDC

Process_Date: Unknown

Source_Produced_Citation_Abbreviation: USGS NLCD

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Earth Satellite Corporation

Contact_Person: David J. Cunningham

Contact_Position: Application Scientist

Contact_Address:

Address_Type: mailing and physical address

Address: 6011 Executive Blvd., Suite 400

City: Rockville

State_or_Province: MD

Postal_Code: 20852-3804

Country: USA

Contact_Voice_Telephone: 240-833-8200

Contact_TDD/TTY_Telephone: N/A

Contact_Facsimile_Telephone: 240-833-8201

Contact_Electronic_Mail_Address: dcunningham@earthsat.com

Hours_of_Service: 0800 - 1600, EST, -5h GMT, M - F

Process_Step:

Process_Description:

To develop adequate training data for tree canopy density estimation, 17 1-m resolution DOQQs across mapping zone 3 were classified into either tree canopy or non-tree canopy areas, and then values summed within each 30 meter Landsat pixel cell to obtain the percentage of tree canopy. The training data were selected based on the degree of variance each training data set possesses with regards to Landsat ETM+ imagery used for mapping. Each added training data set decreased the amount of variance present within the Landsat data as a whole. The process was repeated until the required number of samples had been allocated.By combining the training data with Landsat spectral data and other ancillary data, tree canopy prediction models were developed using "Cubist". After the best combination of possible input data layers had been determined and the final percent canopy density layer produced, a mask was made from the final land cover classification of the mapping zone and was used to eliminate those pixels from the canopy density file that fall into non-forested areas. The mask includes 5 land cover classes (deciduous forest, coniferous forest, mixed forest, woody wetlands, and developed open space).

Acquisition dates of Landsat ETM+ (TM) scenes used for land cover classification in this zone are as follows:SPRING-Index 1 for Path 14/Row 32 on 04/05/2001 = Scene_ID 7014032000109550,Index 2 for Path 14/Row 33 on 04/05/2001 = Scene_ID 7014033000109550,Index 3 for Path 14/Row 34 on 04/05/2001 = Scene_ID 7014034000109550,Index 4 for Path 14/Row 35 on 04/05/2001 = Scene_ID 7014035000109550,Index 5 for Path 15/Row 32 on 03/24/2000 = Scene_ID 7015032000008450,Index 6 for Path 15/Row 33 on 03/24/2000 = Scene_ID 7015033000008450,Index 7 for Path 15/Row 34 on 03/24/2000 = Scene_ID 7015034000008450,Index 8 for Path 15/Row 35 on 03/24/2000 = Scene_ID 7015035000008450,

LEAF ON (Summer) -Index 1 for Path 14/Row 32 on 07/05/1999 = Scene_ID 7014032009918650,Index 2 for Path 14/Row 33 on 07/05/1999 = Scene_ID 7014033009918650,Index 3 for Path 14/Row 34 on 07/05/1999 = Scene_ID 7014034009918650,Index 4 for Path 14/Row 35 on 07/05/1999 = Scene_ID 7014035009918650,Index 5 for Path 15/Row 32 on 07/28/1999 = Scene_ID 7015032009920950,Index 6 for Path 15/Row 33 on 07/28/1999 = Scene_ID 7015033009920950,Index 7 for Path 15/Row 34 on 07/28/1999 = Scene_ID 7015034009920950,Index 8 for Path 15/Row 35 on 07/28/1999 = Scene_ID 7015035009920950,

LEAF-OFF (Fall) -Index 1 for Path 14/Row 32 on 09/23/1999 = Scene_ID 7014032009926651,Index 2 for Path 14/Row 33 on 09/23/1999 = Scene_ID 7014033009926651,Index 3 for Path 14/Row 34 on 09/23/1999 = Scene_ID 7014034009926651,Index 4 for Path 14/Row 35 on 09/23/1999 = Scene_ID 7014035009926651,Index 5 for Path 15/Row 32 on 10/02/2000 = Scene_ID 7015032000027650,Index 6 for Path 15/Row 33 on 10/02/2000 = Scene_ID 7015033000027650,Index 7 for Path 15/Row 34 on 09/30/1999 = Scene_ID 7015034009927350,Index 8 for Path 15/Row 35 on 09/30/1999 = Scene_ID 7015035009927350,

Landsat data and ancillary data used for the tree canopy -

Data Type of DEM composed of 1 band and a Continuous Variable Type.

Data Type of Slope composed of 1 band and a Continuous Variable Type.

Data Type of Aspect composed of 1 band of Categorical Variable Type.

Data type of Position Index composed of 1 band of Continuous Variable Type.

Source_Used_Citation_Abbreviation: Landsat 7, DEM

Process_Date: Unknown

Source_Produced_Citation_Abbreviation: USGS NLCD

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Position: Customer Service Representative

Contact_Address:

Address_Type: mailing and physical address

Address: EROS Data Center

Address: 47914 252nd Street

City: Sioux Falls

State_or_Province: SD

Postal_Code: 57198-0001

Country: USA

Contact_Voice_Telephone: 605/594-6151

Contact_TDD/TTY_Telephone: 605/594-6933

Contact_Facsimile_Telephone: 605/594-6589

Contact_Electronic_Mail_Address: custserv@usgs.gov

Hours_of_Service: 0800 - 1600 CT, M - F (-6h CST/-5h CDT GMT)

Contact_Instructions:

The USGS point of contact is for questions relating to the data display and download from this web site. Questions about this NLCD mapping zone can be directed to the NLCD 2001 land cover mapping team at the USGS EROS Data Center (EDC), Sioux Falls, SD (605) 594-6151 or mrlc@usgs.gov.

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation: C:\DOCUME~1\theel\LOCALS~1\Temp\xmlAD7.tmp

Process_Date: Unknown

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Pixel

Row_Count: 26707

Column_Count: 44143

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: North American Datum of 1983

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: Band_1

Entity_Type_Definition: Percent Canopy Estimate

Entity_Type_Definition_Source: NLCD

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_Definition: 0 - 100

Attribute_Definition_Source: Percentage

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Overview_Description:

Entity_and_Attribute_Overview: Attributes defined by USGS and ESRI.

Entity_and_Attribute_Detail_Citation:

Attribute accuracy is described, where present, with each attribute defined in the Entity and Attribute Section.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Position: Customer Service Representative

Contact_Address:

Address_Type: mailing and physical address

Address: USGS EROS Data Center

Address: 47914 252nd Street

City: Sioux Falls

State_or_Province: SD

Postal_Code: 57198-0001

Country: USA

Contact_Voice_Telephone: 605/594-6151

Contact_TDD/TTY_Telephone: 605/594-6933

Contact_Facsimile_Telephone: 605/594-6589

Contact_Electronic_Mail_Address: custserv@usgs.gov

Hours_of_Service: 0800 - 1600 CT, M - F (-6h CST/-5h CDT GMT)

Contact_Instructions:

The USGS point of contact is for questions relating to the data display and download from this web site. Questions about the NLCD mapping zone 3 can be directed to the NLCD 2001 land cover mapping team at the USGS EROS Data Center (EDC), Sioux Falls, SD (605) 594-6151 or mrlc@usgs.gov.

Resource_Description: Downloadable data

Distribution_Liability:

Although these data have been processed successfully on a computer system at the USGS, no warranty expressed or implied is made by the USGS regarding the use of the data on any other system, nor does the act of distribution constitute any such warranty. Data may have been compiled from various outside sources. Spatial information may not meet National Map Accuracy Standards. This information may be updated without notification. The USGS shall not be liable for any activity involving these data, installation, fitness of the data for a particular purpose, its use, or analyses results.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: Arc/Info Export Format and/or ArcView Shapefile

Format_Version_Number: ArcGIS 8.2

Format_Specification: ASCII

Transfer_Size: 0.001

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <http://seamless.usgs.gov>

Access_Instructions:

The URL <http://seamless.usgs.gov> provides a map interface that allows for data downloads within a customer defined area of interest. Zoom tools are available that can be used to investigate areas of interest on the map interface. The download tool allows the customer to capture layers from the map, utilizing the Seamless Data Distribution System process for downloading. A request summary page is then generated with the download layers listed. By clicking the "download" button on the summary page, a zipped file will be generated that can be saved on the customer's computer. The file can then be unzipped and imported into various user software applications.

Online_Computer_and_Operating_System: Not available for dissemination

Fees: None

Ordering_Instructions: Contact Customer Services

Turnaround: Variable

Custom_Order_Process: Contact Customer Services Representative

Technical_Prerequisites:

ESRI ArcMap Suite and/or Arc/Info software, and supporting operating systems.

Metadata_Reference_Information:

Metadata_Date: 20040804

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Position: Customer Services Representative

Contact_Address:

Address_Type: mailing and physical address

Address: EROS Data Center

Address: 47914 252nd Street

City: Sioux Falls

State_or_Province: SD

Postal_Code: 57198-0001

Country: USA

Contact_Voice_Telephone: 605/594-6151

Contact_TDD/TTY_Telephone: 605/594-6933

Contact_Facsimile_Telephone: 605/594-6589

Contact_Electronic_Mail_Address: custserv@usgs.gov

Hours_of_Service: 0800 - 1600 CT, M - F (-6h CST/-5h CDT GMT)

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-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: None

Metadata_Security_Handling_Description: None

Metadata_Extensions:

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

Profile_Name: ESRI Metadata Profile