The North Carolina Department of Environment, Health, and Natural Resources, Division of Marine Fisheries in cooperation with the North Carolina Center for Geographic Information and Analysis developed the digital GIS data set, Anadromous Fish Spawning Areas, to enhance planning, siting, and impact analysis in areas directly affecting the fish-spawning in areas for fish who swim upstream to spawn. The arc data identifies locations of these sites in North Carolina.
This data was created to assist governmental agencies and others in making resource management decisions through the use of a Geographic Information System (GIS).
Extents of spawning areas change based on numerous impactive measures. One such measure is the removal of impediments (small dams) which allow increased migration, opening additional spawning areas. >system filename: afsa file size = 0.7 mb > >Revisions and updates to this layer include: >3.) filename: afsa1298 The December 1998 update to this layer >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. >2.) filename: afsa995 The September 11, 1995 update included: >a.) A section was added to Kehukee Swamp (upstream to White Millpond >dam) affecting the Roanoke 100k quad. >b.) A section was added to Contentnea Creek (upstream to Wiggins Mill >dam) affecting the Rocky Mount 100k quad. >c.) A section was added to the Cape Fear River (upstream to US-401 >bridge at Lillington) affecting the Fayetteville and >Elizabethtown 100 k quads. >d.) A section was added to the Upper Chowan River tributaries affecting >the Norfolk 100k quad. >e.) A section was added to the main stem portion of White Oak River >above the NC-24 bridge and to a main stem portion of New River >above the NC-172 bridge affecting the New River 100k quad. >1.) filename: afsa1092 The original version was data October 1992.
Data creation and update dates
Acknowledgement of products derived from this data set should cite the following: The source of the Anadromous Fish Spawning 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.
3441 Arendel Street, PO Box 769
Preferred contact is by mail or telephone.
>Division of Marine Fisheries Director, Bruce Freeman >3441 Arendel Street, PO Box 769 >Morehead City, NC 28557-0769 >NCCGIA Director, Karen Siderelis >Database Administration, Zsolt Nagy >Database Management, Ken Shaffer >Project Manager, Michael D. Rink >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
The NCDEHNR-DMF delineated the spawning area boundaries onto 1:100,000-scale topo maps. These areas were then digitally selected from the 1:100,000-scale hydrography layer and copied into a new layer. Arc/Info's version 5.0 Arcedit module was used to select the linework and copy it into the new coverage. There are no user-generated attribute values, look-up tables, annotation or cartosets for this data.
Using ESRI's Arc/Info software, the data set was cleaned for arcs with a dangle distance of 10 feet and a fuzzy distance of 1 foot. Topology has not been edited since the last build or clean.
These data represent the known locations of Anadromous Fish Spawning Areas, as known by the DMF.
Site locations were marked on 1:100,000-scale USGS topographic maps which match National Map Accuracy Standards, using a best estimate with reference to surrounding features. Using 100,000-scale USGS digital line graphs, the hydrographic linework, representing the hydrographic features of the waterbodies know to be spawning areas for anadromous fish, based on the DMF delineations, was copied from the digital line graph files into a separate coverage. The present linework shown represents the dlg version, with possible minor cartographic corrections.
Delineations of anadromous fish spawning areas
Paper maps used to delineate the anadromous fish spawning areas
The Anadromous Fish Spawning Areas were handdrawn by NC DEHNR-Div. of Marine Fisheries staff onto 15 coastal 1:100,000-scale topo maps. The areas marked had been identified by their sampling from 1971 to 1992. Spawning in Lake Mattamuskeet was shown by the Ph.D. dissertation by Tyus (1971) at NCSU and the Newport River area is based on sampling by NMFS.
3441 Arendel Street, PO Box 769
Phone and electronic mail preferred
The NC DEHNR-Div. of Marine Fisheries delivered to CGIA the anadromous fish spawning area boundaries delineated onto 1:100,000-scale topo maps. These areas were then digitally selected from the 1:100,000-scale hydrography layer and copied into a new layer. Arc/Info's version 5.0 Arcedit module was used to select the linework and copy it into the new coverage. Using ESRI's Arc/Info software, the data set was cleaned for arcs with a dangle distance of 10 feet and a fuzzy distance of 1 foot.
301 North Wilmington Street, Suite 700
Phone and electronic mail preferred
Metadata imported.
Internal feature number.
ESRI
Feature geometry.
ESRI
Internal number of poly to left of arc
Software computed
Internal number of poly to right of arc
Software computed
Length of arc in coverage units
Software computed
Internal feature number
Software computed
Internal feature number
User defined
Arc coverage depicting anadromous fish spawning areas. The arc attribute table (AAT) includes unique numeric identification only. The attributes are all computer generated. >AFSA.AAT Arc Attribute Table >COLUMN ITEM NAME WIDTH OUTPUT TYPE 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 AFSA# 4 5 B - Internal id number >25 AFSA-ID 4 5 B - Internal id number
None
301 North Wilmington Street, Suite 700
Phone and electronic mail preferred For current COST INFORMATION, use a web browser: http://www.cgia.state.nc.us/cost.html
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.
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.
301 North Wilmington Street, Suite 700
Phone and electronic mail preferred