Identification_Information: Citation: Citation_Information: Originator: Silvia Terziotti Publication_Date: 2009 Title: landcoversw Edition: Version 1.0, June 30, 2009 Geospatial_Data_Presentation_Form: raster digital data Publication_Information: Publication_Place: Raleigh, NC Publisher: U.S. Geological Survey Online_Linkage: \\Igsavbewfs001\Work\SWAP_updates\FinalLayers\SW\landcoversw Description: Abstract: Land-cover classes to characterize watersheds is one of 6 data sets updated for the North Carolina Public Water Supply, Source Water Assessment Program. These data are used to rate the susceptibility of public water supplies in North Carolina to contamination. The original dataset was produced in 2000. This version is updated to reflect new data sources. This data set represents the ratings applied to the land-cover classes for use in the rating of the watershed characteristics for public surface-water suppliers. The ratings are based on the likelihood that the type of material covering the land surface influences whether precipitation runs off or infiltrates into the subsurface. For surface-water systems, the greater the likelihood that water runs off the land surface and therefore the greater the likelihood of contamination from nonpoint- source runoff in the water supply, the higher the rating applied 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 1996 Amendments to the Safe Drinking Water Act require that each state prepare a source-water assessment for all public water supplies. States are required to (1) delineate source areas supplying wells and surface-water intakes, (2) inventory potential contaminant sources within the delineated source areas, and (3) determine the susceptibility of wells or intakes to the inventoried potential contaminant sources. In North Carolina, the lead agency charged with this task is the Public Water Supply Section (PWSS) of the Division of Environmental Health, Department of Environment and Natural Resources (DENR). North Carolina's Source Water Assessment Program (SWAP) provides assessments of each public drinking water intake in North Carolina. These assessments provide a relative susceptibility rating calculated using state-wide data. The U.S. Geological Survey (USGS) cooperated with the PWSS to provide components of the inherent vulnerability rating that was used with the contaminant rating to determine the overall susceptibility rating of source water supplies. To assist the PWSS with rating ground water inherent vulnerability, the USGS compiled the unsaturated zone rating based on the following characteristics: vertical hydraulic conductance, depth to water, land surface slope, land use and land cover. The watershed characteristic rating includes average annual precipitation, land surface slope, land use, land cover and groundwater contribution. The SWAP program has planned for updates to the initial ratings as conditions change and new data sources become available. The initial data used to calculate the unsaturated zone ratings and watershed characteristics ratings were compiled from sources from the late 1990's. Critical data layers have been updated since the ratings were calculated. These improved data layers need to be used in the ongoing update of the susceptibility ratings. 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. 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 COVER: he main objective of the Multi-Resolution Land Characteristics (MRLC) consortium is to generate a generalized and consistent land cover data layer for the entire conterminous United States (Bara, 1994). The first release of a National land cover product was in 1992. The Multi-Resolution Land Characteristics (MRLC) data used in 1999 was the NLCD 1992 data product. The source of land cover for this update is the National Land Cover Dataset (NLCD) 2001 land cover product. The 2001 data was released over a multi-year period, beginning in about 2004 for North Carolina. Slight changes were made to the land cover classes for the NLCD 2001 data. The USGS has published a cross-walk to allow users of the 1992 data to match categories in the 2001 data. A table is provided from the NLCD 1992-2001 Retrofit Change Product website to aid is comparing the 1992 product with the 2001 product (http://www.mrlc.gov/changeproduct.php). A great deal of care was taken when assigning values to the land cover classes in the original project. A team of experts were used to come up with assigned ratings for each land cover class. The scope of this update effort did not allow the time to reassemble a team of outside experts to assign values to new classes in the land cover data set. An internal review team of specialists were assembled at the USGS to review the land cover classes and assign rating values to the new classes. The team was comprised of USGS, N.C. Water Science Center employees including the N.C. Water Quality Specialist, N.C. Surface Water Specialist, N.C. Groundwater Specialist, Albermarle-Pamlico Basin National Water-Quality Assessment Study Unit Chief, Hydrologic Investigations Section Chief, and the N.C. Geographic Information Systems Specialist. Team members reviewed the definitions of new classes and reviewed the cross-walk from the 1992 to 2001 data set to assign final ratings to all classes of the 2001 NLCD land cover data for the unsaturated zone, watershed characteristics and land use. 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. Land cover, which describes the physical overlay of the land surface, influences the amount of precipitation that runs off the land surface. Runoff is greatest with increasing impervious land cover. For developed areas where asphalt and structures are common, most of the rainfall runs off the land surface. Where rain falls directly on the ground, the amount of infiltration depends in part on the soil characteristics and vegetative cover. Ratings were assigned to the land-cover categories by using information about runoff coefficients and Soil Conservation Service curve numbers as general guidelines (Overton, 1976). High ratings are associated with land cover that facilitates runoff. Land-cover categories and ratings for watershed characteristics rating in North Carolina, 2009 >NLCD code. class Description Percent of Land Cover > area in NC WSC Rating >41. Deciduous Forest - Areas dominated by trees >generally greater than 5 meters tall, and greater >than 20% of total vegetation cover. More than 75 >percent of the tree species shed foliage simultaneously >in response to seasonal change. 28 1 > >42. Evergreen Forest - Areas dominated by trees >generally greater than 5 meters tall, and greater >than 20% of total vegetation cover. More than 75 >percent of the tree species maintain their leaves >all year. Canopy is never without green foliage. 14 1 > >43. Mixed Forest - Areas dominated by trees generally >greater than 5 meters tall, and greater than 20% of total >vegetation cover. Neither deciduous nor evergreen species >are greater than 75 percent of total tree cover. 3 1 > >52. Shrub/Scrub - Areas dominated by shrubs; less than 5 > meters tall with shrub canopy typically greater than 20% >of total vegetation. This class includes true shrubs, young >trees in an early successional stage or trees stunted from >environmental conditions. 2 2 > >11. Open Water - All areas of open water, generally with >less than 25% cover of vegetation or soil. 1 3 > >90. Woody Wetlands - Areas where forest or shrubland >vegetation accounts for greater than 20 percent of vegetative >cover and the soil or substrate is periodically saturated >with or covered with water. 11 3 > >95. Emergent Herbaceous Wetlands - Areas where perennial >herbaceous vegetation accounts for greater than 80 percent >of vegetative cover and the soil or substrate is periodically >saturated with or covered with water. 1 3 > >71. Grassland/Herbaceous - Areas dominated by grammanoid or >herbaceous vegetation, generally greater than 80% of total >vegetation. These areas are not subject to intensive management >such as tilling, but can be utilized for grazing. 6 3 > >81. Pasture/Hay - Areas of grasses, legumes, or grass-legume >mixtures planted for livestock grazing or the production of >seed or hay crops, typically on a perennial cycle. Pasture/hay >vegetation accounts for greater than 20 percent of total >vegetation. 12 3 > >21. Developed, Open Space - Includes areas with a mixture >of some constructed materials, but mostly vegetation in the >form of lawn grasses. Impervious surfaces account for less >than 20 percent of total cover. These areas most commonly >include large-lot single-family housing units, parks, golf >courses, and vegetation planted in developed settings for >recreation, erosion control, or aesthetic purposes 6 4 > >31. Barren Land (Rock/Sand/Clay) - Barren areas of bedrock, >desert pavement, scarps, talus, slides, volcanic material, >glacial debris, sand dunes, strip mines, gravel pits and other >accumulations of earthen material. Generally, vegetation accounts >for less than 15% of total cover. < 1 5 > >82. Cultivated Crops - Areas used for the production of >annual crops, such as corn, soybeans, vegetables, tobacco, >and cotton, and also perennial woody crops such as orchards >and vineyards. Crop vegetation accounts for greater than 20 >percent of total vegetation. This class also includes all >land being actively tilled. 11 6 > >22. Developed, Low Intensity - Includes areas with a mixture >of constructed materials and vegetation. Impervious surfaces >account for 20-49 percent of total cover. These areas most >commonly include single-family housing units. 2 7 > >23. Developed, Medium Intensity - Includes areas with a >mixture of constructed materials and vegetation. Impervious >surfaces account for 50-79 percent of the total cover. >These areas most commonly include single-family housing units. 1 8 > >24. Developed, High Intensity - Includes highly developed >areas where people reside or work in high numbers. Examples >include apartment complexes, row houses and commercial/ >industrial. Impervious surfaces account for 80 to100 percent >of the total cover. < 1 10 > 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]. 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. 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]. Overton, D.E., and Meadows, M.E., 1976, Stormwater modeling: New York, Academic Press, 358 p. 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: 2009 Currentness_Reference: TM imagery 1998-2001 Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -84.907009 East_Bounding_Coordinate: -75.307866 North_Bounding_Coordinate: 37.554514 South_Bounding_Coordinate: 33.052474 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; Amy Axon,hydrogeologist - Source Water Protection; and David Hammermann, Geographic Information Systems Specialist. The authors also thank the USGS report review team for their review of the update procedures: Jeanne Robbins, Surface-water Specialist; Melinda Chapman, Ground-water Specialist; Mary Giorgino, Water-quality Specialist; and Douglas Harned, ALBE-National Water Quality Assessment Project Chief Native_Data_Set_Environment: Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.2.6.1500 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/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/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/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/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/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/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/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/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/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/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/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 2009 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. Publication_Date: 1994 Title: documentation notebook, [Environmental Monitoring and Assessment Program-Landscape Characterization, Contract 68-DO-0106] 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. Publication_Date: 2000 Title: Methods of rating unsaturated zone and watershed characteristics of public water supplies in North Carolina 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 assigning ratings Source_Information: Source_Citation: Citation_Information: Publication_Date: 2006 Title: National LandCover Dataset Online_Linkage: http://www.mrlc.gov/nlcd_update.php Process_Step: Process_Description: Mosaicked portions of the MRLC data from GA, SC, TN and VA into the NC data (use Arc/Info GRID command MERGE) set so that an overlapping area covering contributing basins Process_Date: 2009 Process_Step: Process_Description: Used the spatial analyst reclass command to create categories from 1 to 10 based on the land cover classes and their assigned rating Process_Date: 2009 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Grid Cell Row_Count: 16160 Column_Count: 28318 Vertical_Count: 1 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: 3200 Lambert_Conformal_Conic: Standard_Parallel: 34.333333 Standard_Parallel: 36.166667 Longitude_of_Central_Meridian: -79.000000 Latitude_of_Projection_Origin: 33.750000 False_Easting: 609601.220000 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: landcoversw.vat Attribute: Attribute_Label: Rowid 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 Overview_Description: Entity_and_Attribute_Overview: > >VALUE Attribute Table, LANDCOVERSW.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, 4, 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 NC for each of the classes. SQMI is the conversion from 30 meter by 30 meter cells to square miles just for the portion of the study area in NC. > >VALUE COUNT PCT_TOT SQMI > 1 180955325 41.61 22388.77 > 2 5964649 2.07 1114.22 > 3 127515527 36.83 19818.60 > 4 21761297 5.83 3136.59 > 5 2013428 0.41 218.94 > 6 25573965 10.35 5568.47 > 7 8853334 2.07 1113.60 > 8 2658908 0.61 326.94 > 10 1051190 0.22 119.14 > >Summary Statistics Table, LANDCOVERSW.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 2.444 1.735 > Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Position: Information Officer Contact_Address: Address_Type: mailing and physical address Address: 3916 Sunset Ridge Rd. City: Raleigh State_or_Province: NC Postal_Code: 27607 Country: USA Contact_Voice_Telephone: (919) 571-4000 Contact_Electronic_Mail_Address: gs-w-ncrlg_www@usgs.gov Contact_Instructions: Contact via email Resource_Description: Downloadable Data 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. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Transfer_Size: 125.206 Metadata_Reference_Information: Metadata_Date: 20090702 Metadata_Review_Date: 2001 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: North Carolina Water Science Center Director Contact_Position: Director 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 Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: none Metadata_Use_Constraints: none Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile