Dataset Identification:
Resource Abstract:
- description: The Drainage_Basin polygon feature class was created as a digital representation of drainage basins for more
than 1,650 continuous-record streamflow-gaging stations, partial record streamflow-gaging stations of the U.S. Geological
Survey (USGS), and other watercourse locations of interest. The Drainage_Basin polygon feature class replaces the drainage
basins previously derived through planimetric methods on paper maps, and provides a digital representation that previously
was unavailable. The dataset will be used for the update and publication of drainage areas to all USGS stations in Virginia.
This dataset represents historical flow patterns and avoids anthropogenic changes to flow when possible. The Drainage_Basin
polygon feature class has a unique format with cascading, or stacked, polygons. In a coverage format, to calculate the drainage
area of a large basin containing multiple sub-basins, the area from multiple polygons would be summed. However, within the
Drainage_Basin polygon feature class, one polygon is used to store the entire drainage area to each USGS station. Because
geodatabases and shapefiles are able to store multiple copies of the same geometry, the Drainage_Basin polygon feature class
can hold polygons that are stacked. During the digitizing and editing phases topology rules were utilized to ensure that stacked
linework was identical. Each polygon in Drainage_Basin has a value within the Station_number field. Most values represent
USGS station number found in the National Water Information System (NWIS) database http://waterdata.usgs.gov/nwis. The station
locations stored within NWIS represent the locations of monitoring equipment maintained by the USGS. During the delineation
process, these locations were used as reference points to the downstream end of a drainage basin, but usually were not the
outlet point. For this reason, the point locations are not contained in this dataset. Most are available through NWIS by searching
for the station number.; abstract: The Drainage_Basin polygon feature class was created as a digital representation of drainage
basins for more than 1,650 continuous-record streamflow-gaging stations, partial record streamflow-gaging stations of the
U.S. Geological Survey (USGS), and other watercourse locations of interest. The Drainage_Basin polygon feature class replaces
the drainage basins previously derived through planimetric methods on paper maps, and provides a digital representation that
previously was unavailable. The dataset will be used for the update and publication of drainage areas to all USGS stations
in Virginia. This dataset represents historical flow patterns and avoids anthropogenic changes to flow when possible. The
Drainage_Basin polygon feature class has a unique format with cascading, or stacked, polygons. In a coverage format, to calculate
the drainage area of a large basin containing multiple sub-basins, the area from multiple polygons would be summed. However,
within the Drainage_Basin polygon feature class, one polygon is used to store the entire drainage area to each USGS station.
Because geodatabases and shapefiles are able to store multiple copies of the same geometry, the Drainage_Basin polygon feature
class can hold polygons that are stacked. During the digitizing and editing phases topology rules were utilized to ensure
that stacked linework was identical. Each polygon in Drainage_Basin has a value within the Station_number field. Most values
represent USGS station number found in the National Water Information System (NWIS) database http://waterdata.usgs.gov/nwis.
The station locations stored within NWIS represent the locations of monitoring equipment maintained by the USGS. During the
delineation process, these locations were used as reference points to the downstream end of a drainage basin, but usually
were not the outlet point. For this reason, the point locations are not contained in this dataset. Most are available through
NWIS by searching for the station number.
Citation
- Title Drainage basin delineations for selected USGS streamflow-gaging stations in Virginia (Drainage_Basin).
-
- creation Date
2018-05-12T15:22:14.962358
Resource language:
Processing environment:
Back to top:
Metadata data stamp:
2018-08-06T20:54:05Z
Resource Maintenance Information
- maintenance or update frequency:
- notes: This metadata record was generated by an xslt transformation from a dc metadata record; Transform by Stephen M. Richard, based
on a transform by Damian Ulbricht. Run on 2018-08-06T20:54:05Z
Metadata contact
-
pointOfContact
- organisation Name
CINERGI Metadata catalog
-
- Contact information
-
-
- Address
-
- electronic Mail Address cinergi@sdsc.edu
Metadata language
eng
Metadata character set encoding:
utf8
Metadata standard for this record:
ISO 19139 Geographic Information - Metadata - Implementation Specification
standard version:
2007
Metadata record identifier:
urn:dciso:metadataabout:f854c9be-d2a3-4e71-81f0-985d4ccd8ba2
Metadata record format is ISO19139 XML (MD_Metadata)