Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 20030901 Title: National Land Cover Database Zone 60 Imperviousness 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: Yang, L, C. Huang, C. Homer, B. Wylie, and M. Coan, 2002. An approach for mapping large-area impervious surfaces: Synergistic use of Landsat 7 ETM+ and high spatial resolution imagery. Canadian Journal of Remote Sensing, 29: 2, 230-240. 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. 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 for mapping zone 60 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, edge matching features and the size requirement of Landsat mosaics. Mapping zone 60 encompasses whole or portions of several states including New Jersey, Delaware, Maryland, Pennsylvania, Virginia, and the District of Columbia. Questions about the NLCD mapping zone 60 can be directed to the NLCD 2001 land cover mapping team at the USGS/EROS, 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: 1533270 meters(X), 2182800 meters(Y) Lower Right Corner: 1852380 meters(X), 1582830 meters(Y) 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: -78.124012 East_Bounding_Coordinate: -73.849718 North_Bounding_Coordinate: 40.816510 South_Bounding_Coordinate: 35.784660 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Imperviousness 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: imagery Theme_Keyword: Base Maps Theme_Keyword: Earth Cover 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 60 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: Delaware Place_Keyword: DE Place_Keyword: Maryland Place_Keyword: MD Place_Keyword: New Jersey Place_Keyword: NJ Place_Keyword: Pennsylvania Place_Keyword: PA Place_Keyword: Virginia Place_Keyword: VA Place_Keyword: District of Columbia 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 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 XP Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 9.0.0.535 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The information on data quality for mapping zone 60 was generated by the Regression Tree algorithm that conducts a cross-validation for assessing classification and prediction reliability. No formal independent accuracy assessment of mapping zone 60 imperviousness has been made. The regression tree algorithm employed in NLCD 2001 mapping offers a cross-validation option for assessing classification and prediction reliability. Cross-validation can provide relatively reliable estimates for imperviousness predictions if the reference data used for cross-validation are collected based on a statistically valid sampling design. For mapping zone 60 imperviousness 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 from the 5 runs was 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: 91 Attribute_Accuracy_Explanation: The above listed value is the overall accuracy obtained for imperviousness data in the cross-validation study for mapping zone 60. Logical_Consistency_Report: The method employed to map percent imperviousness for NLCD 2001 mapping zone 60 consists of three key steps: deriving reference data of imperviousness 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 imperviousness. Completeness_Report: This NLCD product of mapping zone 60 Imperviousness layer is the version 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 percent imperviousness for NLCD 2001 mapping zone 60 consists of three key steps: deriving reference data of imperviousness 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 imperviousness. This method is described in detail in Yang et al. (2003). This method was applied to mapping zone 60 by Earth Satellite Corporation. Source_Used_Citation_Abbreviation: Landsat ETM, DOQQ, USGS/EROS Process_Date: Unknown Source_Produced_Citation_Abbreviation: USGS NLCD Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Earth Satellite Corporation Contact_Position: Customer Service Rep Contact_Address: Address_Type: mailing address Address: 6011 Executive Blvd., Suite 400 City: Rockville State_or_Province: MD Postal_Code: 20852 Country: USA Contact_Voice_Telephone: 800-232-9037 Contact_TDD/TTY_Telephone: NA Contact_Facsimile_Telephone: 301-792-4243 Contact_Electronic_Mail_Address: info@spaceimaging.com Hours_of_Service: 0800-1600 ET, M-F Process_Step: Process_Description: To develop adequate training data for impervious estimation, 20 DOQQ's across the mapping zone with a nominal spatial resolution of 1-m were classified into either pervious or non-pervious surfaces, and then summed within each 30 meter Landsat pixel cell to obtain percentage of imperviousness. 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 selection process was repeated until the amount of variance explained reached a pre-defined threshold. By combining the training data with Landsat spectral data and other ancillary data, percent imperviousness prediction models were developed using a regression tree algorithm (named "Cubist"). All data layers used as input for running the Cubist in order to establish the prediction model for imperviousness are listed in the "Supplemental Information" section. Three ancillary data sets were used for urban/suburban delineation masking, which is essential to confine the imperviousness mapping within the developed areas. After the best combination of possible input data layers had been determined and the final percent impervious layer produced, the urban mask created was used to eliminate those pixels from the final percent impervious file that fall outside identified impervious surface areas. Thus, the impervious pixels identified within the mask were retained, while all non-impervious surface pixels were removed from the final product. This corrected for any small areas of pixels that may have been included as part of the impervious surface layer because their spectral signature was not covered in the Cubist modeling process. Finally, visual inspection of imperviousness layer was made with limited manual editing to eliminate non-urban areas based on area of interest delineated by the mapping team. Acquisition dates of Landsat ETM+ (TM) scenes used for land cover classification in zone 60 are as follows: SPRING- Index 1 for Path 14/Row 32 on 04/05/01 = Scene_ID 7014032000109550 Index 2 for Path 14/Row 33 on 04/05/01 = Scene_ID 7014033000109550 Index 3 for Path 14/Row 34 on 04/05/01 = Scene_ID 7014034000109550 Index 4 for Path 14/Row 35 on 04/05/01 = Scene_ID 7014035000109550 Index 5 for Path 15/Row 32 on 03/24/00 = Scene_ID 7015032000008450 Index 6 for Path 15/Row 33 on 03/24/00 = Scene_ID 7015033000008450 Index 7 for Path 15/Row 34 on 03/24/00 = Scene_ID 7015034000008450 Index 8 for Path 15/Row 35 on 03/24/00 = Scene_ID 7015035000008450 Index 9 for Path 15/Row 34 on 04/09/00 = Scene_ID 7015034000010050 LEAF ON (Summer)- Index 1 for Path 14/Row 32 on 07/05/99 = Scene_ID 7014032009918650 Index 2 for Path 14/Row 33 on 07/05/99 = Scene_ID 7014033009918650 Index 3 for Path 14/Row 34 on 07/05/99 = Scene_ID 7014034009918650 Index 4 for Path 14/Row 35 on 07/05/99 = Scene_ID 7014035009918650 Index 5 for Path 15/Row 32 on 07/28/99 = Scene_ID 7015032009920950 Index 6 for Path 15/Row 33 on 07/28/99 = Scene_ID 7015033009920950 Index 7 for Path 15/Row 34 on 07/28/99 = Scene_ID 7015034009920950 Index 8 for Path 15/Row 35 on 07/28/99 = Scene_ID 7015035009920950 LEAF-OFF (Fall)- Index 1 for Path 14/Row 32 on 09/23/99 = Scene_ID 7014032009926650 Index 2 for Path 14/Row 33 on 09/23/99 = Scene_ID 7014033009926650 Index 3 for Path 14/Row 34 on 09/23/99 = Scene_ID 7014034009926650 Index 4 for Path 14/Row 35 on 09/23/99 = Scene_ID 7014035009926650 Index 5 for Path 15/Row 32 on 10/02/00 = Scene_ID 7015032000027650 Index 6 for Path 15/Row 33 on 10/02/00 = Scene_ID 7015033000027650 Index 7 for Path 15/Row 34 on 09/30/99 = Scene_ID 7015034009927350 Index 8 for Path 15/Row 35 on 09/30/99 = Scene_ID 7015035009927350 Landsat data and ancillary data used for the imperviousness prediction - 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. Ancillary data used for urban area masking include: 1. NOAA Defense Meteorological Satellite Program 1 km city light data (1 band) 2. MRLC 1992 classification (1 band) 3. TIGER 2000 roads (1 band) Source_Used_Citation_Abbreviation: Landsat ETM, 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: USGS/EROS 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 60 can be directed to the NLCD 2001 land cover mapping team at the USGS/EROS, Sioux Falls, SD (605) 594-6151 or mrlc@usgs.gov. Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Pixel Row_Count: 20000 Column_Count: 10638 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: Layer_1 Entity_Type_Definition: NLDC Imperviousness Layer Entity_Type_Definition_Source: National Land Cover Database 2001 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: Percent Imperviousness Attribute_Definition_Source: NLCD 2001 Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 100 Attribute_Units_of_Measure: percentage Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: Count Attribute_Definition: A nominal integer value that designates the number of pixels that have each value in the file; histogram column in ERDAS Imagine raster attributes table Attribute_Definition_Source: NLCD 2001 Attribute_Domain_Values: Unrepresentable_Domain: Integer Attribute: Attribute_Label: Red Attribute_Definition: Red color code for RGB slice by value for canopy image display purposes. The value is arbitrarily assigned by the display software package, unless defined by user. Standard user defined ramp for NLCD project is start color light gray, end color red. Attribute_Definition_Source: NLCD 2001 Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 100 Attribute_Units_of_Measure: CSS Color Value Percentage Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: Green Attribute_Definition: Green color code for RGB slice by value for canopy image display purposes. The value is arbitrarily assigned by the display software package, unless defined by user. Standard user defined ramp for NLCD project is start color light gray, end color red. Attribute_Definition_Source: NLCD 2001 Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 100 Attribute_Units_of_Measure: CSS Color Value Percentage Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: Blue Attribute_Definition: Blue color code for RGB slice by value for canopy image display purposes. The value is arbitrarily assigned by the display software package, unless defined by user. Standard user defined ramp for NLCD project is start color light gray, end color red. Attribute_Definition_Source: NLCD 2001 Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 100 Attribute_Units_of_Measure: CSS Color Value Percentage Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: Opacity Attribute_Definition: A measure of how opaque, or solid, a color is displayed in a layer. Attribute_Definition_Source: NLCD 2001 Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 100 Attribute_Units_of_Measure: Percentage Attribute_Measurement_Resolution: 0.1 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. Note: To ensure all areas of mapping zone 60 are completely covered, a 3,000 meter (100 Landsat pixels) buffer was added to the boundary of mapping zone 60. 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 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 60 can be directed to the NLCD 2001 land cover mapping team at the USGS/EROS, 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 9.0 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: 20060221 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: USGS/EROS 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