River Basin ABBREV MB Broad brd 2 Cape Fear cpf 60 Catawba ctb 8 Chowan cho 8 French Broad frb 2 Hiwassee hiw 1 Little Tennessee ltn 1 Lumber lbr 24 Neuse neu 39 New new 2 Pasquotank pas 13 Roanoke roa 19 Savannah sav no digital data Tar-Pamlico tar 31 Watauga wat 1 White Oak wok 10 Yadkin yad 19 Revisions and updates to this layer include: system filename: /library/librb/tiles/(rivbasabbrev)/nwi filesizes range from 1 - 60 mb per tile 4.) directory: nwi_599 filenames: (rivbas)nwi599 The May 1999 updates to this layer consisted of combining the 100k tiles into river basin files and stripping out the quadrangle neatlines. During this update the data was also projected from NAD27 datum, State Plane projection, units of measure feet TO: NAD83 DATUM, State Plane PROJECTION, UNITS OF MEASURE METERS. This was done to comply with the NC Geographic Information Coordinating Council's "Statement of Direction for North Carolina Corporate Geographic Database Horizontal Reference, Datum and Unit of Measure". This reprojecting was done in various ways depending on the data type and content. Vector data was projected using the 'project' command in ESRI's Arc software and topology was cleaned and built based on coverage needs. Raster data was projected using ESRI's Grid module and various steps as applicable. 3.) directory: nwi_1097 filenames: nwi(100kabbr)1097 In October 1997, additional 24k tiles were being combined into 100k tiles. If the 24 k source changed at any time, these updates were also added to the 100k. The following tiles were edited or added: Asheville, Gastonia, Lancaster. 2.) directory: nwi_1995 filenames: nwi(100kabbr)(month)95 In 1995, additional 24k tiles were being combined into 100k tiles. If the 24 k source changed at any time, these updates were also added to the 100k. During the year, 29 tiles were created or updated as follows: October 1995 - Bayboro September 1995 - Norfolk, Plymouth, Whiteville August 1995 - Raleigh, Roanoke Rapids July 1995 - Asheville, Charlotte, Florence, Fontana Lake, Gaston, Hendersonville, Johnson City, Knoxville, Laurinburg June 1995 - Morehead City May 1995 - Boone, Cleveland, Kinston, Salisbury April 1995 - Fayetteville, Henderson March 1995 - Chapel Hill, Greensboro February 1995 - Rocky Mount January 1995 - Danville, Galax, Southern Pines, Wytheville 1.) directory: nwi_1994 filenames: nwi(100kabbr)(month)94 In 1994, the 24k tiles were being combined into 100k tiles. If the 24 k source changed at any time, these updates were also added to the 100k. During the year, 14 tiles were created as follows: November 1994 - Winston-Salem, New River, Manteo, Hickory October 1994 - South Boston September 1994 - Wilmington, Myrtle Beach, Elizabethtown August 1994 - Virginia Beach, Cape Fear June 1994 - Emporia, Elizabeth City, Currituck Sound May 1994 - Cape Hatteras
U.S. Fish & Wildlife Service, National Wetlands Inventory, 19990518, onemap_prod.SDEADMIN.nwi_poly: U.S. Fish & Wildlife Service, National Wetlands Inventory, St.Petersburg, Florida.Online Links:
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 0.002020
Ordinates (y-coordinates) are specified to the nearest 0.002020
Planar coordinates are specified in meters
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is Geodetic Reference System 80.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257222.
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| Minimum: | varies by tile |
| Maximum: | varies by tile |
| Units: | meters |
| Resolution: | 0.001 |
Sequential unique whole numbers that are automatically generated.
Coordinates defining the features.
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|---|---|
| Minimum: | varies by tile |
| Maximum: | varies by tile |
| Range of values | |
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| Minimum: | varies by tile |
| Maximum: | varies by tile |
| Range of values | |
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| Minimum: | varies by tile |
| Maximum: | varies by tile |
| Range of values | |
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| Minimum: | varies by tile |
| Maximum: | varies by tile |
| Range of values | |
|---|---|
| Minimum: | varies by tile |
| Maximum: | varies by tile |
| Units: | meters |
| Resolution: | 10.0 |
| Range of values | |
|---|---|
| Minimum: | varies by tile |
| Maximum: | varies by tile |
| Range of values | |
|---|---|
| Minimum: | varies by tile |
| Maximum: | varies by tile |
| Formal codeset | |
|---|---|
| Codeset Name: | Valid wetland classification code list |
| Codeset Source: | Photointerpretation Conventions for the National Wetlands Inventory, March 1990 |
| Formal codeset | |
|---|---|
| Codeset Name: | Valid wetland classification code |
| Codeset Source: | United States. U.S. Fish Wildlife Service |
| Formal codeset | |
|---|---|
| Codeset Name: | Valid wetland classification code |
| Codeset Source: | United States. U.S. Fish Wildlife Service |
| Formal codeset | |
|---|---|
| Codeset Name: | Valid wetland classification code |
| Codeset Source: | United States. U.S. Fish Wildlife Service |
| Formal codeset | |
|---|---|
| Codeset Name: | Valid wetland classification code |
| Codeset Source: | United States. U.S. Fish Wildlife Service |
| Formal codeset | |
|---|---|
| Codeset Name: | Valid wetland classification code |
| Codeset Source: | United States. U.S. Fish Wildlife Service |
| Formal codeset | |
|---|---|
| Codeset Name: | Valid wetland classification code |
| Codeset Source: | United States. U.S. Fish Wildlife Service |
| Formal codeset | |
|---|---|
| Codeset Name: | Valid wetland classification code |
| Codeset Source: | United States. U.S. Fish Wildlife Service |
| Formal codeset | |
|---|---|
| Codeset Name: | Federal Information Processing Standard Codes |
| Codeset Source: | U.S. Dept. of the Interior, U.S. Geological Survey |
NWI.PAT Polygon Attribute Table COL ITEM NAME WDTH OPUT TYP N.DEC ALTERNATE NAME 1 AREA 4 12 F 3 5 PERIMETER 4 12 F 3 9 NWI# 4 5 B - 13 NWI-ID 4 5 B - 17 NWI-NAME 20 20 C - 37 FIPS 3 3 I - NWI.AAT Arc Attribute Table COL ITEM NAME WDTH OPUT TYP N.DEC ALTERNATE NAME 1 FNODE# 4 5 B - 5 TNODE# 4 5 B - 9 LPOLY# 4 5 B - 13 RPOLY# 4 5 B - 17 LENGTH 4 12 F 3 21 NWI# 4 5 B - 25 NWI-ID 4 5 B - 29 NWI-NAME 20 20 C - 49 NWI-SYSTEM 2 2 C - 51 NWI-CLASS 7 7 C - 58 NWI-REGIME 3 3 C - 61 NWI-TITAL 1 1 C - 62 NWI-CHEMISTRY 1 1 C - 63 NWI-SOIL 1 1 C - 64 NWI-SPECIAL 1 1 C - 65 FIPS 3 3 I -
U.S. Fish & Wildlife Service, National Wetlands Inventory Chief Cartographer 9720 Executive Center Drive St.Petersburg Florida NCCGIA Director Database Administration, Zsolt Nagy Database Management, Ken Shaffer Project Manager, David Giordano North Carolina Center for Geographic Information and Analysis Governor's Office Office of State Planning 301 North Wilmington Street, Suite 700 Raleigh, NC 27601-2825
Unknown (voice)
The data provide consultants, planners, and resource managers with information on wetland location and type. The data were collected to meet U.S. Fish & Wildlife Service's mandate to map the wetland and deepwater habitats of the United States.
U.S. Geological Survey; U.S. Department of Agriculture; National Aeronautics and Space Administration (NASA), 1992, National Aerial Photography Program (NAPP); National High Altitude Photography (NHAP); Agricultural and Stabilization Conservation Service (ASCS); NASA or special project photography..
U.S. Geological Survey, 1992, USGS 7.5 Minute series quadrangles: U.S. Geological Survey, Reston,VA.
U.S. Fish & Wildlife Service, National Wetlands Inventory, 1994., Wetlands delineations: U.S. Fish & Wildlife Service, National Wetlands Inventory, St.Petersburg,Florida.
NC Center for Geographic Information and Analysis, 1999, NWI maps map joined and projected: NC Center for Geographic Information and Analysis, Raleigh, North Carolina.
Person who carried out this activity:
Unknown (voice)
Person who carried out this activity:
(919) 733-2090 (voice)
(919)715-0725 (FAX)
data@cgia.state.nc.us
Data sources used in this process:
Accuracy is tested by manual comparison of the source with hard copy printouts and/or symbolized display of the digital wetlands data on an interactive computer graphic system. In addition, WAMS software (USFWS-NWI) tests the attributes against a master set of valid wetland attributes.
The positional accuracy of the data delivered by the NWI program is significantly altered at CGIA. This data was reprojected to NAD83, State Plane, Meters using ESRI's projection routine in ARC/INFO version 7.2.
All photo-interpretable wetlands are mapped. In the treeless prairies, 1/4 acre wetlands are mapped. In forested areas, small open water and emergent wetlands are mapped. In general, the minimum mapping unit is from 1 to 3 acres depending on the wetland type and the scale and emulsion of the source aerial photography. In regions of the country where evergreen forested wetlands predominate, wetlands smaller than 3 acres may not be mapped. Thus, a detailed on the ground and historical analysis of a single site may result in a revision of the wetland boundaries established through photographic interpretation. In addition, some small wetlands and those obscured by dense forest cover may not be included in this dataset.
Polygons intersecting the neatline are closed along the border. Segments making up the outer and inner boundaries of a polygon tie end-to-end to completely enclose the area. Line segments are a set of sequentially numbered coordinate pairs. No duplicate features exist nor duplicate points in a data string. Intersecting lines are separated into individual line segments at the point of intersection. Point data are represented by two sets of coordinate pairs, each with the same coordinate values. All nodes are represented by a single coordinate pair which indicates the beginning or end of a line segment. The neatline is generated by connecting the four corners of the digital file, as established during initialization of the digital file. All data crossing the neatline are clipped to the neatline and data within a specified tolerance of the neatline are snapped to the neatline. Tests for logical consistency are performed by WAMS verification software (USFWS-NWI). Once the 7.5 minute extents are map joined into river basin extents, the data is built for topology. No edits have been made since the last build or clean.
Are there legal restrictions on access or use of the data?
- Access_Constraints: none
- Use_Constraints:
- Federal, State, and local regulatory agencies with jurisdiction over wetlands may define and describe wetlands in a different manner than that used in this inventory. There is no attempt, in either the design or products of this inventory, to define the limits of proprietary jurisdiction of any Federal, State, or local government or to establish the geographical scope of the regulatory programs of government agencies. Persons intending to engage in activities involving modifications within or adjacent to wetland areas should seek the advice of appropriate Federal, State, or local agencies concerning specified agency regulatory programs and proprietary jurisdictions that may affect such activities. Acknowledgement of products derived from this data set should cite the following: The source of the National Wetlands Inventory data is the North Carolina Corporate Geographic Database. Earlier versions of this dataset may exist. The user must be sure to use the appropriate data set for the time period of interest. While efforts have been made to ensure that these data are accurate and reliable within the state of the art, CGIA cannot assume liability for any damages or misrepresentation caused by any inaccuracies in the data or as a result of changes to the data caused by system transfers. Although every effort has been made to ensure the accuracy of information, errors and conditions originating from physical sources used to develop the corporate database may be reflected in the data supplied. The requesting agency, corporation, or person(s) must be aware of data conditions and ultimately bear responsibility for the appropriate use of the information with respect to possible errors, original map scale, collection methodology, currency of data, and other conditions specific to certain data.
(919) 733-2090 (voice)
(919) 715-0725 (FAX)
dataq@cgia.state.nc.us
National Wetland Inventory
NCCGIA is charged with the development and maintenance of the State's corporate geographic database and, in cooperation with other mapping organizations, is committed to offering its users accurate, useful, and current information about the state. Although every effort has been made to ensure the accuracy of information, errors and conditions originating from physical sources used to develop the corporate database may be reflected in the data supplied. The client must be aware of data conditions and bear responsibility for the appropriate use of the information with respect to possible errors, original map scale, collection methodology, currency of data, and other conditions specific to certain data. NCCGIA does not support secondary distribution of this data. The use of trade names or commercial products does not constitute their endorsement by the NCCGIA or North Carolina State Government.
FOR DIGITAL OR NON-DIGITAL DATA, Contact NC CGIA, Data Distribution to order data, Phone 919.733.2090 ... Email dataq@cgia.state.nc.us ... Web Page order form <http://www.cgia.state.nc.us/cgdb/index.html>
For current FORMAT/MEDIA INFORMATION, use a web browser: <http://www.cgia.state.nc.us/cost.html> or phone NC CGIA Data Distribution 919.733.2090
Data creation and large data analysis jobs contact Database Administration P:(919)733-2090. All data is available through standard ordering procedures on a cost recovery basis.
All formats supplied are created using ARC/INFO GIS software on Unix workstations. Other formats are available. Format compatibility is the user's responsibility. For more information on formats and media, use a web browser: FORMAT/MEDIA INFORMATION - <http://www.cgia.state.nc.us/cost.html>
(919) 733-2090 (voice)
(919) 715-0725 (FAX)
dataq@cgia.state.nc.us