South Atlantic Water Science Center - North Carolina Office

Rating Unsaturated Zone and Watershed Characteristics of Public Water Supplies - Updates

Metadata - Characterizing the Unsaturated Zone in North Carolina
Landcover Category Ratings

• Identification Information
• Data Quality Information
• Spatial Data Organization Information
• Spatial Reference Information
• Entity and Attribute Information
• Distribution Information
• Metadata Reference Information

Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.

Identification Information:

Citation:

Citation information:

Originators: Silvia Terziotti

*Title:

landcovergw

*File or table name: landcovergw

Publication date: 2009

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\GW\landcovergw

Description:

Abstract:

Land-cover classes to characterize the unsaturated zone 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 unsaturated zone for public ground-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 ground-water systems,
the greater the likelihood that water infiltrates into the subsurface,
and therefore the greater the likelihood of contamination from nonpoint-
sources in the ground-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:

The 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 categories are rated from 1 to 10 according to their
contribution to the inherent vulnerability of ground-water supplies.
Land cover types that impede infiltration and contribute least to
inherent vulnerability of ground-water supplies are assigned a low
rating. Land cover types that allow infiltration and contribute
the most to inherent vulnerability of ground-water supplies are
assigned a high rating.  For example, where asphalt and structures
make up much of the land cover, such as commercial/industrial areas,
very little rainfall infiltrates into the subsurface: the land-cover
rating for this category is 1.  Where the land cover is forested, the
surface is pervious and vegetation impedes runoff; thus, the
land-cover rating is 10.

Land-cover categories and ratings for unsaturated zone rating
in North Carolina, 2009.

> Land cover classes and ratings for the unsaturated zone.
> NLCD	Class  		Class Description  	Percent area in NC  	Land Cover 	UZ Rating
> 24  	Developed, 	Developed, High Intensity - Includes highly		< 1	1
>        	High Intensity	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.
> 11 	Open Water 	Open Water - All areas of open water, generally		1 	2
>				with less than 25% cover of vegetation or soil.
>
> 90 	Woody Wetlands 	Woody Wetlands - Areas where forest or shrubland 	11 	2
>    				vegetation accounts for greater than 20
>				percent of vegetative cover and the soil or substrate
>				is periodically saturated with or covered with water.
>
> 95 	Emergent 	Emergent Herbaceous Wetlands - Areas where perennial  	1 	2
>         Herbaceous	herbaceous vegetation accounts for greater than 80 percent of
>         wetlands  	vegetative cover and the soil or substrate is periodically saturated
>          		with or covered with water.
>
> 23 	Developed, Med	Developed, Medium Intensity - Includes areas with  	1 	2
>				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.
>
> 22 	Developed, Low 	Developed, Low Intensity - Includes areas with a 	2 	4
>				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.
>
> 31 	Barren Land 	Barren Land (Rock/Sand/Clay) - Barren areas of bedrock 	< 1 	6
>		(Rock/Sand/Clay)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.
>
> 82 	Cultivated CropsCultivated Crops - Areas used for the production of 	11 	6
>				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.
>
> 71 	Grassland/    	Grassland/Herbaceous - Areas dominated by grammanoid or 6 	8
>		Herbaceous 	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.
>
> 81 	Pasture/Hay 	Pasture/Hay - Areas of grasses, legumes, or grass-	12 	8
>				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.
>
> 21 	Developed, 	Developed, Open Space - Includes areas with a 		6 	8
>		Open Space	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
>
> 52 	Shrub/Scrub 	Shrub/Scrub - Areas dominated by shrubs; less than  	2 	9
>				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.
>
> 41 	Deciduous 	Deciduous Forest - Areas dominated by trees generally 	28 	10
>		Forest 		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.
>
> 42 	Evergreen 	Evergreen Forest - Areas dominated by trees generally 	14 	10
>		Forest 		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.
>
> 43 	Mixed Forest 	43. Mixed Forest - Areas dominated by trees generally 	3 	10
>				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.
>
>

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].

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.

*Language of dataset: en

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

Local bounding coordinates:

*Left bounding coordinate: 86676.419070

*Right bounding coordinate: 936216.419070

*Top bounding coordinate: 422155.256043

*Bottom bounding coordinate: -62644.743957

Keywords:

Theme:

Theme keywords: Land cover, MRLC, Vulnerability, Unsaturated zone

Theme keyword thesaurus: none

Place:

Place keywords: North Carolina

Place keyword thesaurus: none

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 dataset format: Raster Dataset

*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:

Originators: Silvia Terziotti and Jo Leslie Eimers

Title:

Watershed Characteristics Rating for North Carolina

Publication date: 2001

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:

Originators: Silvia Terziotti and Jo Leslie Eimers

Title:

Unsaturated Zone Characteristics Rating for North Carolina

Publication date: 2001

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:

Originators: Silvia Terziotti and Jo Leslie Eimers

Title:

Land-Use Classes to Characterize Watersheds and the Unsaturated Zone in North Carolina

Publication date: 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: USGS

Online linkage: http://nc.water.usgs.gov/reports/ofr01493/index.html

Cross reference:

Citation information:

Originators: Silvia Terziotti and Jo Leslie Eimers

Title:

Land-Cover Classes to Characterize the Unsaturated Zone in North Carolina

Publication date: 2001

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:

Originators: Silvia Terziotti and Jo Leslie Eimers

Title:

Percent-Slope Classes to Characterize the Unsaturated Zone in North Carolina

Publication date: 2001

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:

Originators: Jo Leslie Eimers, Silvia Terziotti and Gloria Ferrell

Title:

Vertical Series Hydraulic Conductance Classes to Characterize the Unsaturated Zone in North Carolina

Publication date: 2001

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:

Originators: Jo Leslie Eimers, Silvia Terziotti and Mary Giorgino

Title:

Estimated Depth to Water, North Carolina

Publication date: 2001

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:

Originators: Silvia Terziotti and Jo Leslie Eimers

Title:

Land-Cover Classes to Characterize Watersheds in North Carolina

Publication date: 2001

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:

Originators: Silvia Terziotti and Jo Leslie Eimers

Title:

Average Annual Precipitation Classes to Characterize Watersheds in North Carolina

Publication date: 2001

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:

Originators: Silvia Terziotti and Jo Leslie Eimers

Title:

Percent-Slope Classes to Characterize Watersheds in North Carolina

Publication date: 2001

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:

Originators: Silvia Terziotti and Jo Leslie Eimers

Title:

Ground-Water Contribution Classes to Characterize Watersheds in North Carolina

Publication date: 2001

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:

Originators: EPA, USGS Eros Data Center

Title:

North Carolina Land Cover Data

Publication date: 2001

Geospatial data presentation form: map

Publication information:

Publication place: Sioux Falls, SD

Publisher: USGS/EPA

Source scale denominator: 30 meter

Type of source media: online

Source citation abbreviation:

MRLC, or NLCD Version 03-20-2000

Source contribution:

land-cover classes

Source time period of content:

Time period information:

Single date/time:

Calendar date: 19900101

Source currentness reference:

imagery dates

Source information:

Source citation:

Citation information:

Originators: Bara, T.J., comp., ed.

Title:

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: 1994

Type of source media: paper

Source citation abbreviation:

Bara and comp. (1994)

Source contribution:

land-cover classes and definition of categories

Source time period of content:

Time period information:

Single date/time:

Calendar date: 1994

Source currentness reference:

publication date

Source information:

Source citation:

Citation information:

Originators: Eimers, J. L., Weaver, J. C., Terziotti, S., 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 citation abbreviation:

Eimers and others (2000)

Source contribution:

methods for deriving classes

Source time period of content:

Time period information:

Single date/time:

Calendar date: 2000

Source currentness reference:

publication date

Source information:

Source citation:

Citation information:

Title:

NLCD, National Land Cover Dataset updated 2006

Publication date: 2006

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

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\landcovergw

Process date: 2009

Process step:

Process description:

Metadata imported.

Source used citation abbreviation:

W:\SWAP_updates\Documents\Metadata\landcovergw.xml

Spatial Data Organization Information:

*Direct spatial reference method: Raster

Raster object information:

*Image format:

*Number of bands: 1

*Row count: 16160

*Column count: 28318

*Vertical count: 1

*Cell size X direction: 30.000000

*Cell size Y direction: 30.000000

*Bits per pixel: 8

*Pyramid layers: FALSE

*Image colormap: FALSE

*Compression type: Default

*Raster object type: Grid Cell

*Raster display type: matrix values

*Raster origin: Upper Left

Spatial Reference Information:

Horizontal coordinate system definition:

Coordinate system name:

*Projected coordinate system name: NAD_1983_StatePlane_North_Carolina_FIPS_3200

*Geographic coordinate system name: GCS_North_American_1983

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:

*Name: landcovergw.vat

Entity type:

*Entity type label: landcovergw.vat

*Entity type type: Table

*Entity type count: 7

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, LANDCOVERGW.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, 4, 6, 8, 9 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 in 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    1051190     0.22   119.14
>    2   59494953    21.21 11414.43
>    4    8853334     2.07  1113.60
>    6   27587393    10.76  5787.41
>    8   92440779    22.06 11867.71
>    9    5964649     2.07  1114.22
>   10  180955325    41.61 22388.77
>
>Summary Statistics Table, LANDCOVERGW.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           7.769           2.895
>

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: 118.232

*Dataset size: 118.232

Metadata Reference Information:

*Metadata date: 20090702

Metadata review date: 2009

*Language of metadata: en

Metadata contact:

Contact information:

Contact organization primary:

Contact person: North Carolina Water Science Center Director

Contact organization: U.S. Geological Survey

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

Metadata extensions:

*Online linkage: http://www.esri.com/metadata/esriprof80.html

*Profile name: ESRI Metadata Profile

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