NC DENR-Division of Environmental Health, Environmental Health Services Section, Shellfish Sanitation Branch in cooperation with the NC Center for Geographic Information and Analysis, developed the digital Closed Shellfish Harvesting Areas data to enhance planning, siting and impact analysis in areas directly affecting these areas. This file enables users to identify the areas where shellfish harvesting is prohibited by law. This data covers eastern North Carolina .
This data was created to assist governmental agencies and others in making resource management decisions through use of a Geographic Information System (GIS).
>system filename: csha file size = 5.5 mb > >Revisions and updates to this layer include: >12.)filename: csha300 The March 27, 2000 update consisted >of some polygon additons, as well as enlargements and reductions of >exisitng areas. The data were provided by DENR. >a.) Reduction of the Hatteras - Outer Banks Area on the >Hatteras, Cape Hatteras, and Buxton 1:24,000-scale quads. >b.) Reduction of Middletown Creek in the Englehard Area on the >Middletown and Middletown Anchorage 1:24,000-scale quads. >c.) Reduction of the Wright and Satterthwaite Creek areas on the >Pamlico Beach 1:24,000-scale quad. >d.) Reduction of the Calabash Area on the Calabash, Little River; >and Shallotte 1:24,000-scale quads. >e.) Enlargement of the Stokely Cut/Old Moore's Inlet Channel Area >on the Wrightsville Beach 1:24,000-scale quad. >f.) A polygon addition and elargement of an exisitng area in the >Calabash Area on the Shallotte 1:24,000-scale quad. >g.) Enlargement of the Cape Fear River/Elizabeth River Area on the >Lockwoods Folly, Southport, and Kure Beach 1:24,000-scale quads. >h.) Enlargement of the Swansboro Area on the Hubert and Swansboro >1:24,000-scale quads. >i.) Reduction of the Pettiford and Starkey Creeks area on the >Swansboro 1:24,000-scale quad. >j.) Enlargement of the Stevens Creek area on the Swansboro >1:24,000-scale quad. >k.) Enlargement of Hoop Pole Creek area on the Mansfield >1:24,000-scale quad. >l.) Enlargement of the Fish-N-Lake Area on the Beaufort >1:24,000-scale quad. >m.) A polygon addition to the Myrtle Grove Sound Area on the >Carolina Beach 1:24,000-scale quad. >n.) Reduction of the Shallotte River area on the Holden Beach >1:24,000-scale quad. > >11.)filename: csha1198 This comprehensive update consisted of >numerous polygon additions and modifications of existing areas >based on information provided by DENR. >The November 1998 update to this layer also >consisted of projecting the data 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. > >10.)filename: csha496 The April 11, 1996 update consisted of a >polygon addition provided by DENR. The addition was Sanders >Creek on the Salter Path 1:24000-scale quad in Carteret County. > >9.) filename: csha196 The January 25, 1996 update consisted of >a polygon addition and an enlargement of an existing area. The >data were provided by DENR. Updates include the following: >a.) Addition of Rogers Bay on the Spicer Bay 1:24,000-scale quad >in Onslow County; >b.) Enlargement of Middle Sound area with the Wrightsville Beach >closure on the Wrightsville Beach and Scotts Hill 1:24,000-scale >quads in New Hanover County > >8.) filename: csha1195 (previously called nc.csha1195) >The November 13, 1995 update consisted of >several polygon additions and modifications to existing areas. The >data were provided by DENR. Updates include the following: >a.) Addition of South River/ Adams Creek Area on the South River and >Merrimon 1:24,000-scale quad in Carteret County; >b.) Addition of Wrightsville Beach Area on the Wrightsville Beach >1:24,000-scale quad in New Hanover County; >c.) Addition of Stokley Cut/Old Moore's Inlet Channel Area on the >South River 1:24,000-scale quad in Carteret County. >(The following edits were made on October 4, 1995 but were >released with the 11/13/95 edits in order to finalize the metadata >files. There was no separate, released, update for 10/4/95, and >therefore no archived coverage.) >d.) Addition of Archer Creek on the Swansboro 1:24,000-scale quad; >e.) Addition of Oceana Marina on the Carolina Beach 1:24,000-scale >quad; >f.) Addition of Sandy Bay on the Hatteras 1:24,000-scale quad; >g.) Revision to the size of the closure area made to Spicer Bay on the >Spicer Bay and Holly Ridge 1:24,000-scale quads. > >7.) filename: csha595 (previously called nc.csha595) >The May 19, 1995 update consisted of several >polygon additions and modifications to existing areas. The data were >provided by DENR. Updates include the following: >a.) Modifications/additions in Carteret County affected the >1:24,000-scale Beaufort and Mansfield quads. >b.) Modification to Hyde County affected the 1:24,000-scale >Ocracoke quad. >c.) Modifications/additions in New Hanover County affected the >1:24,000-scale Carolina Beach and Wrightsville Beach quads. > >6.) filename: csha1094 The October 6, 1994 update consisted of >the following changes: (previosly called nc24.csha1094) >a.) Mill Creek on the Sneads Ferry quad was added. >b.) New River closure line on Jacksonville South and Camp LeJeune >quads was moved farther south. > >5.) filename: csha994 The September 16, 1994 update >consisted of: (previously called nc24.csha91694) >the additions of the following areas to the closed list: >a.) Long Shoal River and 5th Avenue Pump Canal on the Englehard >East and Long Shoal Point quadrangles. >b.) Galleon Bay on the New River Inlet and Sneads Ferry quadrangles. >c.) West Thoroughfare Bay and Long Bay Area/Salter Creek Canal on >the Long Bay quadrangle. > >4.) filename: csha794 The July 14, 1994 update consisted of the >following changes: (previously named nc24.csha71494) >a.) Belhaven quadrangle had the Pungo River, Pungo and Pantego >Creek closures added. >b.) Pamlico Beach quadrangle had the Slade Creek closure added. >c.) Core Creek quadrangle had the Russell Creek closure and >Deerfield Shore Marina enlargement added. > >3.) filename: csha51994 The May 19, 1994 update consisted of >the following changes: (previously named nc24.csha51994) >a.) Davis quadrangle had the Oyster Creek closure deleted. >b.) Styron Bay and Atlantic quadrangles had the Grover Creek >closure added. > >2.) filename: csha5394 The May 3, 1994 update consisted of the >following changes: (previously called nc24.csha5394) >a.) Williston quadrangle had the Fulchers Bay closure added. >b.) Harker's Island quadrangle had the Cow Pen Creek Closure added. >c.) Middleton quadrangle had the North Bluff Point closure deleted. > >1.) filename: csha194 This was the first version of this data. >(previously called nc24.csha194)
Data creation and revision dates
Acknowledgement of products derived form this data set should cite the following: The source of the Closed Shellfish Harvesting Areas 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.
P.O. Box 769
Preferred contact is by mail or telephone
>Division of Environmental Health Director, Linda Sewall >Environmental Health Services Section Chief, Michael Rhodes >Shellfish Sanitation Branch Head, Robert Benton >NC Dept. of Environment, Health, and Natural Resources >2728 Capitol Boulevard >Raleigh, NC 27604 > >NCCGIA Director, Karen Siderelis >Database Administration, Zsolt Nagy >Database Management, Ken Shaffer >Project Manager, Tim Johnson >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
Coordinate readings in degrees-minutes-seconds for closure lines were taken and then transferred onto various NOAA nautical charts by the Shellfish Sanitation Branch. The nautical charts were photo-copied and then distributed to CGIA for digital automation. After automation, check plots at 1:24,000 scale were run for QA/QC purposes. Staff at Shellfish Sanitation Branch either verified or made corrections to the checkplots. Those corrections were then entered into the digital file. This digital file is updated and changes occur.
Using ESRI's ARC/INFO GIS software, the dataset was built for polygon topology using the "build" command. The data set was then cleaned with a fuzzy tolerance of (1 foot.) Topology has not been edited since the last build or clean.
These data represent the locations of Closed Shellfish Harvesting Areas in North Carolina as delineated by NC DENR - Division of Environmental Health, Environmental Health Services Section, Shellfish Sanitation Branch. Each area is labeled as being a closed area or non-water area.
Closed Shellfish Harvesting Areas were generated by coordinates given to CGIA from the Shellfish Sanitation Branch. After the closure line was generated, it may have been extended or shortened to meet the appropriate shoreline file. This method gave CGIA the best estimate with reference to surrounding features.
Locations of Closed Shellfish Harvesting Areas
Paper maps used to delineate the closed shellfish harvesting areas vary in scale with the largest being 1:12,500 and the smallest being 1:416,944.
Coordinate readings in degrees-minutes-seconds for closure lines were taken and then transferred onto various NOAA nautical charts by the Shellfish Sanitation Branch. The nautical charts were photo-copied and then distributed to CGIA for digital automation. After automation, check plots at 1:24,000 scale were run for QA/QC purposes. Staff at Shellfish Sanitation Branch either verified or made corrections to the checkplots. Those corrections were then entered into the digital file.
P.O. Box 769
preferred contact is by mail or telephone
A backcover of the USGS 1:24,000-scale shoreline was used to give a reference for determining part of the boundary for the closure polygons. The coordinates supplied by Shellfish Sanitation Branch to CGIA were then projected from degrees-minutes-seconds into NC state plane coordinates using the Arc PROJECT command. Those new coordinates were entered into the digital file using Arc/Info's Arcedit module and the coordinate keyboard ADD command. Adjustments were made to the shape of the generated closure line due to inexact positioning of the shoreline. Part of the closure arcs shared by the shoreline file were copied from the shoreline coverage to create closed polygons. The resulting coverage was built for topology and labeled to indicate those polygons that were closed, or were merely islands within. Checkplots were created at the 1:24,000-scale and then reviewed by Shellfish Sanitation staff for accuracy. Edits were made and a complete coverage was established which undergoes periodic updates as areas become closed by polution.
301 North Wilmington Street, Suite 700
Phone and electronic mail preferred
Total perimeter in coverage units
General description or name of closed area
NC DENR-Div. of Environmental Health, Division of Marine Fisheries
Internal feature number.
Area of feature in internal units squared.
From-node identifier of linear feature
To-node identifier of linear feature
Internal number of poly to left of arc
Internal number of poly to right of arc
Length of arc in coverage units
Internal feature number
Internal identification number
A polygon coverage depicting areas classified by the NC DENR-Div of Environmental Health, Environmental Health Services Section, Shellfish Sanitation Branch as being either open or closed to shellfish harvesting. The polygon attribute table (PAT) has attribute data including total area in coverage units (square feet), total perimeter (linear feet), polygon internal identification number, polygon user identification number, and a code number indicating whether is a closed area or a land area. >CSHA.PAT Polygon Attribute Table >COLUMN ITEM NAME WIDTH OUTPUT TYPE DEC DESCRIPTION >1 AREA 4 12 F 3 Total area in meters >5 PERIMETER 4 12 F 3 Total perimeter in meters >9 CSHA# 4 5 B - Poly internal id number >13 CSHA-ID 4 5 B - Poly user id number >17 CODE# 2 2 B - Code defining closed area or >land >19 PROCLAMATION 20 20 C - Proclamation in which area is >described >39 DESCRIP 60 60 C - Description of closed area >CSHA.AAT Arc Attribute Table >COL ITEM NAME WDTH OPUT TYP N.DEC DESCRIPTION >1 FNODE# 4 5 B - From-node id of linear feature >5 TNODE# 4 5 B - To-node id of linear feature >9 LPOLY# 4 5 B - Left-side polygon id of linear >feature >13 RPOLY# 4 5 B - Right-side polygon id of linear >feature >17 LENGTH 4 12 F 3 Length of linear feature in >meters >21 CSHA# 4 5 B - Internal id number >25 CSHA-ID 4 5 B - Internal id number
301 North Wilmington Street, Suite 700
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301 North Wilmington Street, Suite 700
Phone and electronic mail preferred