The North Carolina Department of Environment and Natural Resources, Division of Water Quality, in cooperation with the NC Center for Geographic Information and Analysis, developed the GIS data set, Ambient Water Quality Monitoring Sites data to enhance planning, siting, and impact analysis in areas directly affecting water quality. This file identifies locations in North Carolina where water quality data are collected on a routine basis and analyzed for presence of various chemicals.
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 : awqms file size = 0.1 mb > >Revisions and updates to this layer include: >3.) filename: awqms900 The September 30 2000 update consisted of >CGIA receiving from DWQ an EXCEL spreadsheet that listed active >ambient water quality monitoring stations. This database contained >corrections to many of the sites from the original database. >Additionally, many stations were moved, discontinued, or added since >the original database. NC Division of Water Quality has changed the >process by which station locations are mapped. With the submission >of this new data the layer is longer considered unverified. >2.) filename: uvawqms1298 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. >1.) uvawqms794 - This July 11, 1994 version represents the original >version of this data. There was a file from March of 1991 which >contained a point improperly placed. This 7/11/94 version corrected >that location and the old version was deleted. This file is >considered unverified (UV).
Date the active sites were verified by DWQ.
Acknowledgement of products derived from this data set should cite the following: The source of the Ambient Water Quality Monitoring Sites 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.
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>NC Dept. of Environment and Natural Resources >Div of Water Quality >Water Quality Section >Environmental Sciences Branch >512 N. Salisbury Street >Raleigh, NC 27604-1148 > >Governor's Office >Office of State Budget, Planning and Management >North Carolina Center for Geographic Information and Analysis (CGIA) >301 North Wilmington Street, Suite 700 >Raleigh, NC 27601-2825
The attributes contained in this data were supplied by the source agency as part of the digital file from their database. Data represents information as supplied. No additional background checks were performed.
Using ESRI's ARC/INFO GIS software, the dataset was built for point topology using the "build" command. The data set was then cleaned using the "clean" command. Topology has not been edited since the last build or clean.
This data represents information as supplied from an internal SQL database located at DWQ.
The Ambient Monitoring Sites were manually mapped on 24k USGS paper topographic maps which meet National Map Accuracy Standards, using a best estimate with reference to surrounding features. Latitudes and longitudes were generated using a grid overlay and entered into an internal SQL database. DWQ then converted the data from to an EXCEL spreadsheet for conversion to a GIS coverage. Points were checked for accuracy against NC Corportae GIS Data layers. Refinement of the georeferencing occurred through the use of "Terrain Navigator" software which generates latitude and longitude values at the location of the cursor.
Electronic spreadsheet
NC DENR-DWQ,WQS collected the monitoring sites data and locations in an internal SQL database. The point locations were interpreted from USGS 1:24,000-scale topographic quadrangles using a grid overlay. The point locations and attribute data in this file was exported into an EXCEL spreadsheet and transferred to CGIA via e-mail for conversion to an ARC/INFO coverage for use with GIS software.
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CGIA converted an EXCEL spreadsheet into a shapefile using ESRI's ArcView GIS software. The shapefile was then converted to a coverage using ESRI's ARC/INFO GIS software.
Dataset copied.
Feature geometry.
ESRI
Internal feature number.
ESRI
Feature geometry.
ESRI
Internal feature number.
ESRI
Total perimeter in coverage units
Software computed
STORET primary station identifier
NC DENR-Div of Water Quality, Water Quality Section
Description of station location
NC DENR-Div of Water Quality, Water Quality Section
County names
State of North Carolina
Abbreviation of DWQ Regional Office or program names
NC DENR-Div of Water Quality, Water Quality Section
River Basin abbreviation plus reference number of subbasin within the river basin
NC DENR-Div of Water Quality, Water Quality Section
Abbreviation for name of River Basin
NC DENR-Div of Water Quality, Water Quality Section
7-digit hydrologic unit code
NC DENR-Div of Water Quality, Water Quality Section
Measurement of the angle from the Earth's center to a point on the Earth's surface in a north-south direction
NC DENR-Div of Water Quality, Water Quality Section
Measurement of the angle from the Earth's center to a point on the Earth's surface in an east-west direction
NC DENR-Div of Water Quality, Water Quality Section
A reference to DWQ stream classification for the section of stream in which the station is located
NC DENR-Div of Water Quality, Water Quality Section
A point coverage identifying locations where water quality data are collected and analyzed for presence of various chemicals. The point attribute table (PAT) has attribute data including total area in coverage units (square meters), total perimeter (linear meters), two point internal identification numbers, the STORET primary station identifying number, and a brief description of the monitoring station site. >AWQMS.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 AWQMS# 4 5 B - Point internal id number >13 AWQMS-ID 4 5 B - Point internal id number >17 STORET 9 9 C - STORET primary station ID >26 STATION_DE 9 9 C - Station location description >35 COUNTY 9 9 C - County name >44 REGION 9 9 C - Abbreviation of DWQ Regional >Office or program name >53 BASIN 9 9 C - Abrev. of River Basin name >62 SUBBASIN 9 9 C - Abrev. of River Basin name >plus subbasin number >71 USGS_SITE 8 9 F 0 USGS station number >79 HUC 8 9 F 0 7-digit hydrologic unit code >87 INDEX 9 9 C - DWQ stream index number >96 STREAM_CLA 9 9 C - DWQ stream class >105 LATITUDE 8 9 F 5 Latitude of site >113 LONGITUDE 8 9 F 4 Longitude of site
None
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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