The NC Center for Geographic Information and Analysis, developed this digital Major Hydrography data to enhance planning, siting and impact analysis in areas directly affecting surface waters consisting of streams and rivers, lakes, reservoirs, and shorelines. The data is a subset of the 1:24,000-scale detailed hydrography data. This file is updated as changes occur.
This data was created to assist governmental agencies and others in making resource management decisions through the use of a Geographic Information System (GIS) where information on general hydrographic features is needed.
system filename: hydromaj file size = 6.40 mb Revisions and updates to this layer include: 3.) Previous 1:100,000-scale version was used to select hydro features from 1:24,000-scale coverage to create a new subset of the detailed hydro for purposes of larger scale mapping and making additional attributes available in the major hydrography coverage. Arcs and polygons were created as major_hydro_arcs.shp and major_hydro_polys.shp. In the shapefile version of the polygons, label = 216 was excluded (water offshore) to make the shapefile more suitable for cartographic purposes. 2.) filename: hydromaj299 The February 9, 1999 updates include: a.) 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. b.) Replaced the lake boundary for Falls Lake. Corrected lake boundary digitized from US Army Corps of Engineers 251.5 foot contour overlay that was transferred onto 1:24,000-scale topo sheets. (The original lake contours were surveyed incorrectly and the lake level has since been raised to the correct 251.5 ft level.) c.) Added more detailed stream annotation (anno level 1 - primary streams; anno level 2 - secondary streams). 1.) filename: hydromaj997 The original version was dated September 1997. (perviousl named majhydro) Any previous versions were not offical database releases.
Data creation and revision dates
Acknowledgement of products derived form this data set should cite the following: The source of the Major Hydrography data is the North Carolina Corporate Geographic Database. Earlier versions of this data set 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.
301 North Wilmington Street, Suite 700
Phone and electronic mail preferred
US Geological Survey Reston, Virginia 22092 1-800-USA-MAPS NCCGIA Acting Director, Timothy R. Johnson Database Administration, Zsolt Nagy Project Manager, Jeffrey Brown North Carolina Center for Geographic Information and Analysis Department of Environment and Natural Resources 301 North Wilmington Street, Suite 700 Raleigh, NC 27699-0322
All attribute codes have been extensively edited for accuracy by the associated agency. Stream codes, classifications and use support - NCDENR, DWQ; Linework, DLG code - NCCGIA. Attribute accuracy is considered high.
Using ESRI's ARC/INFO GIS software, the dataset was built for arc and polygon topology using the "build" command. The data set was then cleaned with a fuzzy tolerance of 1 meter. Topology has not been edited since the last build or clean.
These data represent the locations and identities of surface waters consisting of streams and rivers, lakes, ponds, and shorelines, as depicted on USGS 1:100,000-scale digital line graphs and supplemented to reflect hydrographic features classified by the state but not represented on the original DLG linework. Each stream reach is labeled with stream classification and use support information. All stream segments are approved by DWQ whether they are the original DWQ boundaries or changes to original boundaries.
Hydrography 1:100,000-scale features were taken from the USGS 1:100,000-scale DLGs. Supplemented hydrographic features were digitized from 1:24,000-scale bases and the linework checked against the bases to within a linewidth.
Use support spreadsheet and stream classification schedules
Paper maps used to locate the stream reaches
Locations of surface waters consisting of streams and rivers, lakes, ponds, and shorelines combined from both 1:24,000 and 1:100,000-scale sources.
Creation of statewide 100k hydrography by joining 1:100,000 tiles; attributed files with 305(b) data received from DWQ.
Edgematching of 100k tiles, clipping of coverage to river basins,editing of ARC/INFO files to split arcs to match DWQ use support reaches, additional attributes added for use support and stream classification information.
1:100,000-scale Digital Line Graph Files were taken from the USGS and refined. Post DLG and data refinements include: a) Translation of DLG to ARC/INFO data format b) Review and correction for incompleteness and/or incorrect DLG attributes c) Internal and external (in-progress) coordinate edgematching of features along map edges d) Addition of hydrographic features as required by DWQ for stream classifications e) Addition of hydrographic attributes as identified in attribute table specifications f) Deletion of all swamp apparent limits and area label points DWQ Stream classification index numbers were marked onto 1:24,000-scale vellum plots of the 1:100,000-scale hydrography. The index numbers were added to the digital files on screen. Where streams were coded by DWQ but not present in the digital file, 1:24,000-scale hydrographic features were digitized off of USGS base maps. Index numbers, stream classes, and stream locations were checked by DWQ using plots generated by CGIA. The linework is tiled to 1:100,000-scale map extents and stored in a digital library. These files are updated as needed.
301 North Wilmington Street, Suite 700
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Water quality for specific stream reaches was evaluated by DWQ and a use support rating assigned. This rating identifies how well a stream reach meets its designated uses. Ratings and additional attributes are maintained in an ACCESS database or EXCEL spreadsheet and updated by river basin on a 5-year rotation. DWQ provided this spreadsheet to RTI for joining to the 100k hydrography data layer. DWQ provides CGIA with updates as they occur.
1617 Mail Center
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100k hydrography was obtained for North Carolina from the Geographic Information & Analysis. 40 1:100,000 quadrangle tiles were imported to ArcView. Tiles were exported as .dbf files to FoxPro. A statewide FoxPro database was created. 305(b) data was obtained as an EXCEL spreadsheet from DWQ and converted to FoxPro. The 305(b) spreadsheet was joined to the hydrography data by index# using FoxPro. Shapefile created in ArcView and exported to ArcInfo. The ArcInfo file was supplied to NC CGIA for final editing.
P.O. Box 12194
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The statewide 100k hydrography tiles were edgematched and mapjoined. The neatlines were removed and the coverage clipped to the North Carolina State boundary. This file was then clipped to the 17 river basins. Each river basin was edited such that index numbers matched. Attributes were re-named and edited in cooperation with DWQ. GIA updates the digital files as needed.
301 North Wilmington Street, Suite 700
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Phone and electronic mail preferred
Metadata imported.
Internal feature number.
ESRI
Feature geometry.
ESRI
Polygon internal identification number
Software computed
Polygon internal identification number
Software computed
DLG standard code for feature
US Geological Survey
DLG standard code for feature
US Geological Survey
Stream name as listed in DWQ Classification Guide
NC DENR-Div of Water Quality, Water Quality Section
River basin
NC DENR-Div of Water Quality, Water Quality Section
Feature maintenance status
NC CGIA
record number
NC DENR-Div. Of Water Quality, Water Quality Section
1:100,000 scale tile
NC Center for Geographic Information
DWQ index number (ex: 9-53-1a) for 305B stream reaches
NC DENR-Div of Water Quality, Water Quality Section
Sub-basin #
NC DENR-Div. Of Water Quality, Water Quality Section
Use support rating showing if waters are meeting the uses for which they are classified
NC DENR-Div of Water Quality, Water Quality Section
Water use is fully supporting its classification
NC DENR-Div of Water Quality, Water Quality Section
Water use is partially supporting its classification
NC DENR-Div of Water Quality, Water Quality Section
Water use is not supporting its classification
NC DENR-Div of Water Quality, Water Quality Section
Water use has not been rated for classification
NC DENR-Div of Water Quality, Water Quality Section
Determines if the rating was assigned on a monitored or evaluated basis
NC DENR-Div of Water Quality, Water Quality Section
Rating was on a monitored basis
NC DENR-Div of Water Quality, Water Quality Section
Rating was on an evaluated basis
NC DENR-Div of Water Quality, Water Quality Section
Rating was on both a monitored and evaluated basis
NC DENR-Div of Water Quality, Water Quality Section
Problem parameters from 305b spreadhseet
NC DENR-Div of Water Quality, Water Quality Section
Major source of impairment, point or nonpoint
NC DENR-Div of Water Quality, Water Quality Section
point source of impairment
NC DENR-Div of Water Quality, Water Quality Section
nonpoint source of impairment
NC DENR-Div of Water Quality, Water Quality Section
Description of use support stream reach beginning and end
NC DENR-Div. Of Water Quality, Water Quality Section
Date of last use support update
NC DENR-Div of Water Quality, Water Quality Section
Specific WQ pollutant causing impairment (sediment, nutrients,..)
NC DENR-Div of Water Quality, Water Quality Section
DWQ index number (ex: 9-53-1a) for 303D stream reaches
NC DENR-Div of Water Quality, Water Quality Section
Waterbody name as listed in DWQ Classification Guide
NC DENR-Div. Of Water Quality, Water Quality Section
DWQ stream classification index number (ex: 9-53-1)
NC DENR-Div of Water Quality, Water Quality Section
DWQ stream classification (ex: WS-III)
NC DENR-Div of Water Quality, Water Quality Section
Waters protected as water supplies which are in natural and undeveloped watersheds
NC DENR-Div of Water Quality, Water Quality Section
Waters protected as water supplies which are generally in predominantly undeveloped watersheds
NC DENR-Div of Water Quality, Water Quality Section
Waters protected as water supplies which are generally in low to moderately developed watersheds
NC DENR-Div of Water Quality, Water Quality Section
Waters protected as water supplies which are generally in moderately to highly developed watersheds
NC DENR-Div of Water Quality, Water Quality Section
Waters protected as water supplies which are generally upstream and draining to Class WS-IV waters
NC DENR-Div of Water Quality, Water Quality Section
Primary recreation and any other usage specified by the "C" classification
NC DENR-Div of Water Quality, Water Quality Section
Aquatic life propagation and survival, fishing, wildlife, secondary recreation, and agriculture
NC DENR-Div of Water Quality, Water Quality Section
Shellfishing for market purposes and any other usage specified by the "SB" and "SC" classification
NC DENR-Div of Water Quality, Water Quality Section
Primary recreation and any other usage specified by the "SC" classification
NC DENR-Div of Water Quality, Water Quality Section
Aquatic life propagation and survival, fishing, wildlife, and secondary recreation
NC DENR-Div of Water Quality, Water Quality Section
Suitable for natural trout propagation and maintenance of stocked trout
NC DENR-Div of Water Quality, Water Quality Section
Waters which have low velocities and other natural characteristics which are different from adjacent streams
NC DENR-Div of Water Quality, Water Quality Section
High Quality Waters which are waters that are rated as excellent based on biological and physical/chemical characteristics through division monitoring or special studies; native and special native trout waters (and their tributaries) designated by the Wildlife Resources Commission; primary nursery areas (PNA) designated by the Marine Fisheries Commission and other functional nursery areas designated by the Wildlife Resources Commission; critical habitat areas designated by the Wildlife Resources Commission or the Department of Agriculture; all water supply watersheds which are either classified as WS-I or WS-II or those for which a formal petition for reclassification as WS-I or WS-II has been received from the appropriate local government and accepted by the Division of Water Quality; and all Class SA waters.
NC DENR-Div of Water Quality, Water Quality Section
Nutrient Sensitive Waters which require limitations on nutrient inputs
NC DENR-Div of Water Quality, Water Quality Section
Outstanding Resource Waters which are unique and special waters of exceptional state or national recreational or ecological significance which require special protection to maintain existing uses.
NC DENR-Div of Water Quality, Water Quality Section
Date of last feature classification
NC DENR-Div of Water Quality, Water Quality Section
Description of classification stream reach beginning and end
NC DENR-Div. Of Water Quality, Water Quality Section
Supplemental descriptive information
NC Center for Geographic Information and Analysis
From-node identifier of linear feature
Software compute
To-node identifier of linear feature
Software computed
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 (meters)
Software computed
Polygon internal identification number
Software computed
Polygon internal identification number
Software computed
DLG standard code for feature
US Geological Survey
DLG standard code for feature
US Geological Survey
Stream name as listed in DWQ Classification Guide
NC DENR-Div of Water Quality, Water Quality Section
River basin
NC DENR-Div of Water Quality, Water Quality Section
Feature maintenance status
NC Center for Geographic Information and Analysis
record number
NC DENR-Div. Of Water Quality, Water Quality Section
1:100,000 scale tile
NC Center for Geographic Information and Analysis
DWQ index number (ex: 9-53-1a) for 305B stream reaches
NC DENR-Div of Water Quality, Water Quality Section
Sub-basin #
NC DENR-Div. Of Water Quality, Water Quality Section
Use support rating showing if waters are meeting the uses for which they are classified
NC DENR-Div of Water Quality, Water Quality Section
Water use is fully supporting its classification
NC DENR-Div of Water Quality, Water Quality Section
Water use is partially supporting its classification
NC DENR-Div of Water Quality, Water Quality Section
Water use is not supporting its classification
NC DENR-Div of Water Quality, Water Quality Section
Water use has not been rated for classification
NC DENR-Div of Water Quality, Water Quality Section
Determines if the rating was assigned on a monitored or evaluated basis
NC DENR-Div of Water Quality, Water Quality Section
Rating was on a monitored basis
NC DENR-Div of Water Quality, Water Quality Section
Rating was on an evaluated basis
NC DENR-Div of Water Quality, Water Quality Section
Rating was on both a monitored and evaluated basis
NC DENR-Div of Water Quality, Water Quality Section
Problem parameters from 305b spreadhseet
NC DENR-Div of Water Quality, Water Quality Section
Major source of impairment, point or nonpoint
NC DENR-Div of Water Quality, Water Quality Section
point source of impairment
NC DENR-Div of Water Quality, Water Quality Section
nonpoint source of impairment
NC DENR-Div of Water Quality, Water Quality Section
Description of use support stream reach beginning and end
NC DENR-Div. Of Water Quality, Water Quality Section
Date of last use support update
NC DENR-Div of Water Quality, Water Quality Section
Specific WQ pollutant causing impairment (sediment, nutrients,..)
NC DENR-Div of Water Quality, Water Quality Section
DWQ index number (ex: 9-53-1a) for 303D stream reaches
NC DENR-Div of Water Quality, Water Quality Section
Length of use support reach in miles; calculated from LENGTH for single line streams This attribute should be considerd an estimate only
NC DENR-Div. Of Water Quality, Water Quality Section
DWQ stream classification index number (ex: 9-53-1)
NC DENR-Div of Water Quality, Water Quality Section
DWQ stream classification (ex: WS-III)
NC DENR-Div of Water Quality, Water Quality Section
Waters protected as water supplies which are in natural and undeveloped watersheds
NC DENR-Div of Water Quality, Water Quality Section
Waters protected as water supplies which are generally in predominantly undeveloped watersheds
NC DENR-Div of Water Quality, Water Quality Section
Waters protected as water supplies which are generally in low to moderately developed watersheds
NC DENR-Div of Water Quality, Water Quality Section
Waters protected as water supplies which are generally in moderately to highly developed watersheds
NC DENR-Div of Water Quality, Water Quality Section
Waters protected as water supplies which are generally upstream and draining to Class WS-IV waters
NC DENR-Div of Water Quality, Water Quality Section
Primary recreation and any other usage specified by the "C" classification
NC DENR-Div of Water Quality, Water Quality Section
Aquatic life propagation and survival, fishing, wildlife, secondary recreation, and agriculture
NC DENR-Div of Water Quality, Water Quality Section
Shellfishing for market purposes and any other usage specified by the "SB" and "SC" classification
NC DENR-Div of Water Quality, Water Quality Section
Primary recreation and any other usage specified by the "SC" classification
NC DENR-Div of Water Quality, Water Quality Section
Aquatic life propagation and survival, fishing, wildlife, and secondary recreation
NC DENR-Div of Water Quality, Water Quality Section
Suitable for natural trout propagation and maintenance of stocked trout
NC DENR-Div of Water Quality, Water Quality Section
Waters which have low velocities and other natural characteristics which are different from adjacent streams
NC DENR-Div of Water Quality, Water Quality Section
High Quality Waters which are waters that are rated as excellent based on biological and physical/chemical characteristics through division monitoring or special studies; native and special native trout waters (and their tributaries) designated by the Wildlife Resources Commission; primary nursery areas (PNA) designated by the Marine Fisheries Commission and other functional nursery areas designated by the Wildlife Resources Commission; critical habitat areas designated by the Wildlife Resources Commission or the Department of Agriculture; all water supply watersheds which are either classified as WS-I or WS-II or those for which a formal petition for reclassification as WS-I or WS-II has been received from the appropriate local government and accepted by the Division of Water Quality; and all Class SA waters.
NC DENR-Div of Water Quality, Water Quality Section
Nutrient Sensitive Waters which require limitations on nutrient inputs
NC DENR-Div of Water Quality, Water Quality Section
Outstanding Resource Waters which are unique and special waters of exceptional state or national recreational or ecological significance which require special protection to maintain existing uses.
NC DENR-Div of Water Quality, Water Quality Section
Date of last feature classification
NC DENR-Div of Water Quality, Water Quality Section
Description of classification stream reach beginning and end
NC DENR-Div. Of Water Quality, Water Quality Section
Length of classification reach in miles; calculated from LENGTH for single line streams and supplemented by measurements from DWQ. This attribute should be considerd an estimate only
NC DENR-Div. Of Water Quality, Water Quality Section
Supplemental descriptive information
NC Center for Geographic Information and Analysis
An arc and polygon coverage depicting surface waters consisting of streams and rivers, lakes, ponds, reservoirs, and shorelines. The arc attribute table (AAT) arc length (linear meters), polygon internal identification number, polygon user identification number, a DWQ internal index number that relates to the identification of the stream, the stream's use support rating, the classification of the surface water, the river basin name, the name of the stream, the date the feature was last classified, the name of the USGS 1:100,000-scale river basin on which the feature is located, two DLG standard feature codes, and a CGIA feature type. BROAD.PAT Polygon Attribute Table COLUMN ITEM NAME WIDTH OUTPUT TYPE DEC DESCRIPTION 1 AREA 4 12 F 3 Total area in feet 5 PERIMETER 4 12 F 3 Total perimeter 9 RB# 4 5 B - Poly internal 13 RB-ID 4 5 B - Poly user id number 17 MINOR1 8 18 F 5 DLG standard code for feature 25 MINOR2 8 18 F 5 DLG standard code for feature 33 STREAM_NAM 100 100 C - Stream name as listed in DWQ Classification Guide 133 WATERBODY 100 100 C - Waterbody name as listed in DWQ Classification Guide 233 RIV_BASIN 20 20 C - River basin name 253 SUBBASIN 8 13 F 5 Identification number of subbasin 261 CGIA_FMS 8 18 F 0 Feature maintenance status 269 DWQ_INDEX# 25 25 C - DWQ stream classification index number (ex: 9-53-1) 296 DWQ_CLASS 15 15 C - DWQ stream classification 311 DWQ_CLDATE 8 8 C - Date of stream classification 319 DESCRIP_CL 170 170 C - Description of stream classification reach 489 COMMENT 60 60 C - Supplemental information BROAD.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 feet 21 RB# 4 5 B - Internal id number 25 RB-ID 4 5 B - Internal id number 29 MINOR1 8 18 F 5 DLG standard code for feature 37 MINOR2 8 18 F 5 DLG standard code for feature 45 STREAM_NAM 100 100 C - Stream name as listed in DWQ Classification Guide 145 RIV_BASIN 20 20 C - River basin name 165 SUBBASIN 8 18 F 5 Identification number of subbasin 173 CGIA_FMS 8 18 F 5 Feature maintenance status 181 DWQ_INDEX# 25 25 C - DWQ stream classification index number (ex: 9-53-1) 206 DWQ_CLASS 15 15 C - DWQ stream classification 221 DWQ_CLDATE 8 8 C - Date of stream classification 229 DESCRIP_CL 170 170 C - Description of stream classification reach 399 CL_LENGTH 8 18 F 5 Length of classification stream reach in miles (calculated for single line streams only) 407 COMMENT 60 60 C - Supplemental information
Refer to source agency for published stream classification documents and use support methodolgy.
301 N. Wilmington Street, Suite 700
Phone and electronic mail preferred For current COST INFORMATION, use a web browser: <http://cgia.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
20322 Mail Center Services
Phone and electronic mail preferred