Revisions and updates to this layer include: 4.) filename: awqms307 Regular update. May 14, 2007. 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).
NC DENR Div of Water Quality (D, Water Quality Section, 20070314, Ambient Water Quality Monitoring Sites: NC DENR Div of Water Quality, Water Quality Section, Raleigh, North Carolina.Online Links:
- www.nconemap.com
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 0.001024
Ordinates (y-coordinates) are specified to the nearest 0.001024
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.
Sequential unique whole numbers that are automatically generated.
Agencies are variable in length and number of words.
Values are 8 digit alphanumeric codes.
Station descriptions are variable in length and number of words.
| Range of values | |
|---|---|
| Minimum: | 33.88168 |
| Maximum: | 36.58805 |
| Range of values | |
|---|---|
| Minimum: | -76.00978 |
| Maximum: | -84.00267 |
County names are variable in length.
State abbreviations are variable in letters.
Region abbreviations are variable in letters.
River Basin abbreviations may vary among DWQ programs.
Subbasin nomenclature may vary among DWQ programs.
| Formal codeset | |
|---|---|
| Codeset Name: | NC Stream Index# |
| Codeset Source: | NC DENR-Div of Water Quality, Water Quality Section |
| Formal codeset | |
|---|---|
| Codeset Name: | NC Stream Classification |
| Codeset Source: | NC DENR-Div of Water Quality, Water Quality Section |
Types are variable in length and number of words.
NC Dept. of Environment and Natural Resources, Division of Water Quality NC Dept. of Environment and Natural Resources, Center for Geographic Information and Analysis
(919) 733-5083 ext. 564 (voice)
(919) 715-5637 (FAX)
dave.hill@ncmail.net
This data was created to assist governmental agencies and others in making resource management decisions through use of a Geographic Information System (GIS).
NC DENR - Div. of Water Quality, Water Quality Section, 20070314, Ambient Water Quality Monitoring Sites: NC DENR - Div. of Water Quality, Raleigh, North Carolina.
Person who carried out this activity:
(919) 733-5083 (voice)
Dave.Hill@ncmail.net
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.
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.
This data represents information as supplied from an internal SQL database located at DWQ.
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.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints:
- Acknowledgement of products derived from this data set should cite the following: The source of the Ambient Monitoring Sites is NC OneMap. Earlier versions of this data set may exist. The user must be sure to use the appropriate dataset 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.
(919) 733-2090 (voice)
(919)715-0725 (FAX)
dataq@ncmail.net
Ambient Water Quality Monitoring Sites
NCCGIA is charged with the development and maintenance of NC OneMap and, in cooperation with other mapping organizations, is committed to offering its users accurate, useful, and current information. Although every effort has been made to ensure the accuracy of information, errors and conditions originating from physical sources used to develop this dataset may be reflected in the data supplied. The user must be aware of possible 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 dataset without its current, compliant metadata record. The use of trade names or commercial products does not constitute their endorsement by NCCGIA or North Carolina State Government.
| Data format: | ESRI shapefile (*.shp) |
|---|---|
| Network links: |
NC OneMap |
Data can be customized on a cost-recovery basis. Contact dataq@ncmail.net or 919-733-2090 for more information.
All formats available from www.nconemap.com are in ESRI shapefile. Other formats are available on a cost-recovery basis - contact dataq@ncmail.net or 919.733.2090 for more information. Format compatibility is the user's responsibility.
(919) 733-2090 (voice)
(919)715-0725 (FAX)
dataq@ncmail.net