Metadata: Identification_Information: Citation: Citation_Information: Originator: Silvia Terziotti and Jo Leslie Eimers, USGS Publication_Date: 2001 Title: Land-Use Classes to Characterize Watersheds and the Unsaturated Zone in North Carolina Edition: Version 1.0, January 25, 2001 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Open-File Report Issue_Identification: USGS OFR 01-493 Publication_Information: Publication_Place: Raleigh, NC Publisher: U.S. Geological Survey Online_Linkage: http://nc.water.usgs.gov/reports/ofr01493/index.html Description: Abstract: Land-use classes to characterize watersheds and the unsaturated zone is one of 11 data sets developed for the North Carolina Source Water Assessment Program. These data are used to rate the susceptibility of public water supplies in North Carolina to contamination. This data set represents the ratings applied to the land-use classes for use in the rating of the unsaturated zone for public ground-water suppliers and in the rating of the watershed characteristics for surface-water suppliers. The same ratings apply for unsaturated zone and watershed characteristics. The ratings relate to the likelihood of potential nonpoint-source contamination for a given land use. For the ground and surface-water systems, the greater the likelihood that nonpoint source contamination exists, the higher the rating on a scale of 1 to 10. Purpose: This data set is to be used in a hydrologic analysis with other data sets to rate the unsaturated zone for public ground-water supplies and watershed characteristics for public surface-water supplies in North Carolina. For ground-water supplies, the factors used to rate susceptibility to contamination include vertical hydraulic conductance, land-surface slope, land cover, and land use. The selected factors used to devise ratings for surface-water supplies' susceptibility to contamination are average annual precipitation, land-surface slope, land cover, land use, and ground-water contribution. Supplemental_Information: The Federal Safe Drinking Water Act (SDWA) Amendments of 1996 emphasize pollution prevention as an important strategy for the protection of ground-water and surface-water resources. This new focus in the SDWA promotes the prevention of drinking water contamination as a cost-effective means of ensuring reliable, long-term, and safe drinking water sources for public water-supply systems (North Carolina Department of Environment and Natural Resources, 1999a). Specifically, Section 1453 of the SDWA Amendments requires that States develop and implement a Source Water Assessment Program (SWAP) to delineate source water areas, inventory potential contaminants in these areas, and determine the susceptibility of each public water supply to contamination. The agency charged with the task of susceptibility assessment in North Carolina is the Public Water Supply Section (PWSS) of the Department of Environment and Natural Resources. The U.S. Geological Survey (USGS) is directed under the Clean Water Action Plan, funded by Congress in 1999, to assist States with water-quality monitoring and susceptibility determinations. The inherent vulnerability rating is a measure of the potential for contaminants within a delineated source area to reach the ground-water or surface-water supply. The inherent vulnerability of a ground-water source of public water supply is determined by combining an aquifer rating and an unsaturated zone rating (North Carolina Department of Environment and Natural Resources, 1999a). The inherent vulnerability of a surface-water source of public water supply is determined by combining a watershed classification, intake location, raw water quality (water plant data), North Carolina Division of Water Quality Use Support rating, and watershed characteristics rating (North Carolina Department of Environment and Natural Resources, 1999a). In cooperation with the PWSS, the USGS developed methods to rate unsaturated zones for public ground-water systems and watershed characteristics for public surface-water intakes. All other components of inherent vulnerability were compiled by the PWSS. Overlay and index methods for rating susceptibility to contamination of the unsaturated zone for ground-water suppplies, and watershed characteristics for surface-water supplies were derived for use by the State of North Carolina in assessing more than 11,000 public water-supply wells and approximately 245 public surface-water intakes. Factors that influence the inherent vulnerability of ground water and surface water were selected and assigned ratings on a scale of 1 to 10. These factors were then assigned weight to reflect their relative influence on inherent vulnerability and the reliability of the data. The values for each factor were obtained from geographic information system (GIS) data layers that were transformed into Arc/Info raster data sets known as grids. These raster data sets have 30-meter by 30-meter cells, and each cell is assigned a weighted- factor value. The identification of factors, development of ratings for each, and subsequent assignment of weights were based on (1) a literature search, which included examination of potential factors and their effects on the drinking-water quality; and (2) consultation with experts in the fields of hydrology, geology, forestry, agriculture, and water management. The relative rating of the unsaturated zone and watershed characteristics combines hydrologic data with expert knowledge to assess the vulnerability of water supplies to contamination. Factors selected for rating the inherent vulnerability of the unsat- urated zone to contamination are vertical series hydraulic conductance, land-surface slope, land cover, and land use. Vertical series hydraulic conductance measures the capacity of the unsaturated material to transmit water. Land-surface slope influences whether precipitation runs off land surfaces or infiltrates into the subsurface. Land cover describes the physical overlay of the land surface, which influences the amount of precipitation that runs off or infiltrates into the subsurface. Land use describes activities occurring on the land surface that influence the potential generation of nonpoint-source contamination. Factors selected for rating vulnerability to contamination of the watershed upstream from surface-water intakes are average annual precipitation, land-surface slope, land cover, land use, and ground-water contribution. The average annual precipitation represents the mass of water that becomes available for transport in a watershed. Land-surface slope, land cover, and land use have similar influences on watershed characteristics as those identified for the unsaturated zone. In the cases of land-surface slope and land cover, the ratings for watershed characteristic vulnerability are the opposite of unsaturated zone vulnerability to contamination (i.e. more infiltration or ponding produces a higher vulnerability to ground- water, but less to surface-water sources.) Ground-water contribution represents the part of streamflow that is derived from ground-water discharge. Limitations -- The overlay and index methods of unsaturated zone and watershed characteristics ratings are broad-stroke methods that assess vulnerability on the basis of expert opinion. The methods aslo have limitations in the age and scale of the hydrologic and geographic data. But the most significant limitation of the methods used is that no statistical confirmation of the results have been performed. LAND USE: The main objective of the Multi-Resolution Land Characteristics (MRLC) consortium was to generate a generalized and consistent land cover data layer for the entire conterminous United States (Bara, 1994). The North Carolina portion of the data set was created as part of land cover mapping activities for Federal Region IV (the states of Kentucky, Tennessee, Mississippi, Alabama, North Carolina, South Carolina, Georgia, and Florida). The development of the Region IV data set was initiated during the spring of 1997, and a first draft product was completed in summer, 1997. This data set was developed by personnel at the EDC, Sioux Falls, South Dakota. For the study, the map projection of the land-cover data was changed from the original Albers conical equal area coordinate system into the North Carolina State Plane system, North American Datum 83, map units of meters, and aligned to match the lower-left corner of the other contributing-factor data sets. Because the MRLC data are categorical, a nearest-neighbor algorithm was used to resample cell values from one coordinate system to the next, thus preserving the spatial accuracy of the classification scheme. The source of data for the land-use factor is identical to the source of data for land cover, both of which are derived from the same land-cover GIS layer (MRLC land-cover data). Although land-use and land-cover categories use the same data source and terminology, they are considered separate factors in the unsaturated zone ratings. The land-use factor measures the potential for generating nonpoint- source contamination at land surface; the land-cover factor influences the amount of precipitation that infiltrates the ground. These factors are treated separately to highlight the influence of nonpoint-source contaminants in the unsaturated zone rating. Land use describes activities that occur on the land surface and influence the potential generation of nonpoint-source contamination from these activities. The effect of land use on water quality has been the subject of previous data-collection and interpretive investigations (Eckhardt and Stackelberg, 1995; Corwin and others, 1997). Of particular note is a series of water-quality studies in large river basins across the United States conducted by the USGS as part of the National Water-Quality Assessment Program (NAWQA), which began in 1991. Other investigations have focused on study areas having one predominant land use, such as effects of agricultural lands on water quality (Nolan and Clark, 1997). Ratings assigned to land-use categories reflect the vulnerability of water supplies to nonpoint-source contamination. Land-use categories and ratings for unsaturated zone and watershed characteristics ratings: >Land Cover Category Description Rating > >Water All areas of open water, 1 > generally with less than > 25 percent vegetative cover. > >Woody wetland Areas of forest or shrubland 1 > vegetation where the soil or > substrate is periodically > saturated or covered with water. > >Emergent wetland Non-woody vascular perennial 1 > vegetation where the soil or > substrate is periodically > saturated or covered with water. > >Bare rock/sand Bare rock, sand, silt, gravel, 2 > other earthen material with little > or no vegetation regardless of its > ability to support life. > >Deciduous forest Areas dominated by trees where 75 3 > percent or more of the tree species > shed foliage simultaneously. > >Mixed forest Areas dominated by trees where 3 > neither deciduous nor evergreen > species represent more than 75 > percent of the cover present. > >Evergreen forest Areas dominated by trees where 3 > 75 percent or more of the tree > species retain their leaves all > year. Canopy is never without green > foliage. > >Pasture/hay Areas dominated by vegetation, 5 > which is planted and(or) maintained > for the production of food or feed. > Grasses, legumes, or mixtures planted > for livestock grazing. > >Quarries/Strip Mines Areas of extractive mining 5 >Gravel pits activities with significant > exposure of land surface. > >Other grasses Vegetation planted in developed 6 > settings for recreation, erosion > control, or aesthetic purposes. > Examples include parks, lawns, > and golf courses. > >Transitional Areas dynamically changing from 7 > one land cover to another, often > because of changes in land-use > activities. > >Row crops Areas dominated by vegetation 7 > that is planted and(or) used > for the production of crops > such as corn, soybeans, vegetables, > tobacco, and cotton. > >Low-intensity Residential development. 7 >development Constructed materials account > for 30 to 80 percent of the > total area. Most commonly, > single-family housing areas, > especially suburban neighborhoods. > >High-intensity Residential development. 8 >Residential Densely-built urban centers, > apartment complexes, and row > houses. Vegetation occupies > less than 20 percent of the > landscape. Constructed materials > account for 80 to 100 percent of > the total area. > >Commercial/Industrial Land used for the manufacture 10 > of products or sale of goods. > Includes all highly-developed > lands not classified as resi- > dential, most of which are > commercial, industrial, or > transportation. SELECTED REFERENCES: Bara, T.J., comp., ed., 1994, Multi-resolution land characteristics consortium--documentation notebook, [Environmental Monitoring and Assessment Program-Landscape Characterization, Contract 68-DO-0106]: Research Triangle Park, N.C., ManTech Environmental Technology, Inc. [variously paged]. Corwin, D.L., Vaughn, P.J., and Loague, K., 1997, Modeling nonpoint source pollutants in the vadose zone with GIS: Environmental Science and Technology, v. 31, no. 8, p. 2157-2174. Eckhardt, D.A., and Stackelberg, P.E., 1995, Relation of ground-water quality to land use on Long Island, New York: Ground Water, v. 33, no. 6, p. 1019-1033. Eimers, J. L., Weaver, J. C., Terziotti, S., and Midgette, R. W., 2000, Methods of rating unsaturated zone and watershed characteristics of public water supplies in North Carolina: U. S. Geological Survey Water-Resources Investigations Report 99-4283, 31 p. Nolan, B.T., and Clark, M.L., 1997, Selenium in irrigated agricultural areas of the western United States: Journal of Environmental Quality, v. 26, no. 3, p. 849-857. North Carolina Department of Environment and Natural Resources, 1999, North Carolina source water assessment program plan: Raleigh, North Carolina Department of Environment and Natural Resources, Division of Environmental Health, Public Water Supply Section, [variously paged]. For more information on MRLC data please see: http://www.epa.gov/mrlc/ or http://gisdata.usgs.gov DISCLAIMER: Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ARC/INFO format, this metadata file may include some ARC/INFO-specific terminology. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 19990930 Currentness_Reference: TM imagery 1990 - 1993 Status: Progress: Complete Maintenance_and_Update_Frequency: None Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -84.90706954 East_Bounding_Coordinate: -75.16688733 North_Bounding_Coordinate: 37.49637014 South_Bounding_Coordinate: 33.05247366 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: Land cover Theme_Keyword: MRLC Theme_Keyword: Vulnerability Theme_Keyword: Unsaturated zone Theme_Keyword: Watershed Place: Place_Keyword_Thesaurus: none Place_Keyword: North Carolina Access_Constraints: none Use_Constraints: These data are not to be used for site-specific analysis Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Silvia Terziotti Contact_Organization: U.S. Geological Survey Contact_Position: Computer Specialist Contact_Address: Address_Type: mailing address Address: 3916 Sunset Ridge Road City: Raleigh State_or_Province: NC Postal_Code: 27607 Country: USA Contact_Voice_Telephone: (919) 571-4000 Contact_Facsimile_Telephone: (919) 571-4041 Contact_Electronic_Mail_Address: (seterzio@usgs.gov) Data_Set_Credit: The authors are grateful to colleagues in the Public Water Supply Section of the Division of Environmental Health, North Carolina Department of Environment and Natural Resources (DENR) for their assistance in this collaborative project: thanks to Robert Midgette, Protection and Enforcement Branch Head; Elizabeth Morey, Hydrogeologist; Gale Johnson, Hydrogeologist; and Rajpreet Butalia, Geographic Information Systems Coordinator. The authors also thank the following scientists and engineers who provided additional technical review of this work: > Richard Burns, Watershed and Forest Hydrologist, U.S. Forest Service, > U.S. Department of Agriculture > Ron Coble, Professional Geologist [Retired USGS] > Ed Holland, Orange County Water and Sewer Authority > Beth McGee, Clean Water Management Trust Fund > Ted Mew, Groundwater Section, Division of Water Quality, North > Carolina DENR > Joe Rudek, Environmental Defense Fund > Henry Wade, Pesticides Section, North Carolina Department of > Agriculture > Steve Zoufaly, Division of Water Quality, North Carolina DENR The authors also thank the USGS report review team for their review of the metadata products: Stephen J. Char, Jason M. Fine, Michael L. Strobel, Douglas A. Harned and Rebecca J. Deckard. Native_Data_Set_Environment: Windows_NT, 5.0, Intel ARC/INFO version 8.0.2 Cross_Reference: Citation_Information: Originator: Silvia Terziotti and Jo Leslie Eimers Publication_Date: 2001 Title: Watershed Characteristics Rating for North Carolina Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Open-File Report Issue_Identification: USGS OFR 01-490 Publication_Information: Publication_Place: Raleigh, NC Publisher: USGS Online_Linkage: http://nc.water.usgs.gov/reports/ofr01490/index.html Cross_Reference: Citation_Information: Originator: Silvia Terziotti and Jo Leslie Eimers Publication_Date: 2001 Title: Unsaturated Zone Characteristics Rating for North Carolina Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Open-File Report Issue_Identification: USGS OFR 01-489 Publication_Information: Publication_Place: Raleigh, NC Publisher: USGS Online_Linkage: http://nc.water.usgs.gov/reports/ofr01489/index.html Cross_Reference: Citation_Information: Originator: Silvia Terziotti and Jo Leslie Eimers Publication_Date: 2001 Title: Land-Use Classes to Characterize Watersheds and the Unsaturated Zone in North Carolina Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Open-File Report Issue_Identification: USGS OFR 01-493 Publication_Information: Publication_Place: Raleigh, NC Publisher: USGS Online_Linkage: http://nc.water.usgs.gov/reports/ofr01493/index.html Cross_Reference: Citation_Information: Originator: Silvia Terziotti and Jo Leslie Eimers Publication_Date: 2001 Title: Land-Cover Classes to Characterize the Unsaturated Zone in North Carolina Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Open-File Report Issue_Identification: USGS OFR 01-491 Publication_Information: Publication_Place: Raleigh, NC Publisher: USGS Online_Linkage: http://nc.water.usgs.gov/reports/ofr01491/index.html Cross_Reference: Citation_Information: Originator: Silvia Terziotti and Jo Leslie Eimers Publication_Date: 2001 Title: Percent-Slope Classes to Characterize the Unsaturated Zone in North Carolina Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Open-File Report Issue_Identification: USGS OFR 01-495 Publication_Information: Publication_Place: Raleigh, NC Publisher: USGS Online_Linkage: http://nc.water.usgs.gov/reports/ofr01495/index.html Cross_Reference: Citation_Information: Originator: Jo Leslie Eimers, Silvia Terziotti and Gloria Ferrell Publication_Date: 2001 Title: Vertical Series Hydraulic Conductance Classes to Characterize the Unsaturated Zone in North Carolina Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Open-File Report Issue_Identification: USGS OFR 01-486 Publication_Information: Publication_Place: Raleigh, NC Publisher: USGS Online_Linkage: http://nc.water.usgs.gov/reports/ofr01486/index.html Cross_Reference: Citation_Information: Originator: Jo Leslie Eimers, Silvia Terziotti and Mary Giorgino Publication_Date: 2001 Title: Estimated Depth to Water, North Carolina Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Open-File Report Issue_Identification: USGS OFR 01-487 Publication_Information: Publication_Place: Raleigh, NC Publisher: USGS Online_Linkage: http://nc.water.usgs.gov/reports/ofr01487/index.html Cross_Reference: Citation_Information: Originator: Silvia Terziotti and Jo Leslie Eimers Publication_Date: 2001 Title: Land-Cover Classes to Characterize Watersheds in North Carolina Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Open-File Report Issue_Identification: USGS OFR 01-492 Publication_Information: Publication_Place: Raleigh, NC Publisher: USGS Online_Linkage: http://nc.water.usgs.gov/reports/ofr01492/index.html Cross_Reference: Citation_Information: Originator: Silvia Terziotti and Jo Leslie Eimers Publication_Date: 2001 Title: Average Annual Precipitation Classes to Characterize Watersheds in North Carolina Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Open-File Report Issue_Identification: USGS OFR 01-494 Publication_Information: Publication_Place: Raleigh, NC Publisher: USGS Online_Linkage: http://nc.water.usgs.gov/reports/ofr01494/index.html Cross_Reference: Citation_Information: Originator: Silvia Terziotti and Jo Leslie Eimers Publication_Date: 2001 Title: Percent-Slope Classes to Characterize Watersheds in North Carolina Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Open-File Report Issue_Identification: USGS OFR 01-496 Publication_Information: Publication_Place: Raleigh, NC Publisher: USGS Online_Linkage: http://nc.water.usgs.gov/reports/ofr01496/index.html Cross_Reference: Citation_Information: Originator: Silvia Terziotti and Jo Leslie Eimers Publication_Date: 2001 Title: Ground-Water Contribution Classes to Characterize Watersheds in North Carolina Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Open-File Report Issue_Identification: USGS OFR 01-488 Publication_Information: Publication_Place: Raleigh, NC Publisher: USGS Online_Linkage: http://nc.water.usgs.gov/reports/ofr01488/index.html Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The accuracy of the ratings are based on expert opinion. No field verification of source land-cover classes was performed for this project. Logical_Consistency_Report: Not applicable for raster data. Completeness_Report: MRLC data was processed in 5/2000. An updated version of the data is now available. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: based on 30 meter data - accuracy checks not performed by Raleigh office Lineage: Source_Information: Source_Citation: Citation_Information: Originator: EPA Originator: USGS Eros Data Center Publication_Date: 19980701 Title: North Carolina Land Cover Data Geospatial_Data_Presentation_Form: map Publication_Information: Publication_Place: Sioux Falls, SD Publisher: USGS/EPA Other_Citation_Details: Version 03-20-2000 Source_Scale_Denominator: 30 meter Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 19900101 Source_Currentness_Reference: imagery dates Source_Citation_Abbreviation: MRLC or NLCD Source_Contribution: land-cover classes Source_Information: Source_Citation: Citation_Information: Originator: Bara, T.J. Originator: comp., ed. Title: Multi-resolution land characteristics consortium-- documentation notebook, [Environmental Monitoring and Assessment Program-Landscape Characterization, Contract 68-DO-0106] Publication_Date: 1994 Series_Information: Series_Name: Research Triangle Park, N.C., ManTech Environmental Technology, Inc. [variously paged]. Issue_Identification: Contract 68-DO-0106 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1994 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Bara and comp. (1994) Source_Contribution: land-cover classes and definitions Source_Information: Source_Citation: Citation_Information: Originator: Eimers, J. L. Originator: Weaver, J. C. Originator: Terziotti, S. Originator: Midgette, R. W. Title: Methods of rating unsaturated zone and watershed characteristics of public water supplies in North Carolina Publication_Date: 2000 Series_Information: Series_Name: U. S. Geological Survey Water-Resources Investigations Issue_Identification: WRIR 99-4283 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2000 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Eimers and others (2000) Source_Contribution: methods for deriving classes Process_Step: Process_Description: Mosaicked portions of the MRLC data from GA, SC, TN and VA into the NC data set so that an overlapping area, covering contributing basins, was within the data set. Georgia data was version 032000, SC data version 031600, TN version 060199, and VA version 042400. The Arc/Info GRID command, MOSAIC, was used to mosaic the data sets. Process_Date: 20001230 Process_Step: Process_Description: Used the following remap table to change the classes to a rating from 1 to 10. (Using the Arc/Info GRID command, SLICE, with the TABLE option). >11 : 1 >21 : 7 >22 : 8 >23 : 10 >31 : 2 >32 : 5 >33 : 7 >41 : 3 >42 : 3 >43 : 3 >81 : 5 >82 : 7 >85 : 6 >91 : 1 >92 : 1 > Process_Date: 20000514 Process_Step: Process_Description: First draft of metadata created by seterzio using FGDCMETA.AML ver. 1.33 07/15/99 on ARC/INFO data set g:\gw_layers\landusegw Process_Date: 20010125 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Grid Cell Row_Count: 16163 Column_Count: 28734 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: State Plane Coordinate System 1983 State_Plane_Coordinate_System SPCS_Zone_Identifier: 4901 Lambert_Conformal_Conic: Standard_Parallel: 34.333 Standard_Parallel: 36.167 Longitude_of_Central_Meridian: 79.000 Latitude_of_Projection_Origin: 33.750 False_Easting: 2000000 False_Northing: 0.000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 30.0 Ordinate_Resolution: 30.0 Planar_Distance_Units: Meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: GRS1980 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: > >Value Attribute Table, LANDUSEGW.VAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 VALUE 4 10 B - > 5 COUNT 4 10 B - > 9 PCT_TOT 4 8 F 2 > 13 SQMI 4 8 F 2 > VALUE is the rating: valid values are integers 1, 2, 3, 5, 6, 7, 8, and 10. COUNT is the number of 30-meter by 30-meter cells in the entire data set that have the rating. PCT_TOT is the percent of the total area within each of the classes. SQMI is the conversion from 30 meter by 30 meter cells to square miles. > > VALUE COUNT PCT_TOT SQMI > 1 55756936 14.80 19374.99 > 2 443340 0.12 154.06 > 3 221420427 58.79 76941.45 > 5 36398539 9.66 12648.14 > 6 1550519 0.41 538.79 > 7 55470477 14.73 19275.45 > 8 1620652 0.43 563.16 > 10 3965887 1.05 1378.11 > >Summary Statistics Table, LANDUSEGW.STA: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 MIN 8 15 F 3 > 9 MAX 8 15 F 3 > 17 MEAN 8 15 F 3 > 25 STDV 8 15 F 3 > MIN is the minimum value of item VALUE. MAX is the maximum value of item VALUE. MEAN is the average value of item VALUE. STDV is the standard deviation of item VALUE. > > MIN MAX MEAN STDV > 1.000 10.000 3.593 1.909 > Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Position: Water Webserver Team Contact_Address: Address_Type: mailing and physical address Address: 12201 Sunrise Valley Drive, MS 440 City: Reston State_or_Province: VA Postal_Code: 20192 Country: USA Contact_Voice_Telephone: (800) 426-9000 Contact_Instructions: Contact via email Contact_Electronic_Mail_Address: h2oteam@usgs.gov Distribution_Liability: Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Metadata_Reference_Information: Metadata_Date: 20010125 Metadata_Review_Date: 20010125 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: North Carolina District Chief Contact_Position: District Chief Contact_Address: Address_Type: mailing and physical address Address: 3916 Sunset Ridge Road City: Raleigh State_or_Province: NC Postal_Code: 27607 Country: USA Contact_Voice_Telephone: (919) 571-4000 Contact_Facsimile_Telephone: (919) 571-4041 Contact_Electronic_Mail_Address: dc_nc@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata ("CSDGM version 2") Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: none Metadata_Use_Constraints: none