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Global GIS : Drainage Basins
- Identification Information
- Data Quality Information
- Spatial Data Organization Information
- Spatial Reference Information
- Entity and Attribute Information
- Distribution Information
- Metadata Reference Information
- Identification Information
- Citation
- Originator
- EROS Data Center
- Originator
- Geological Survey (U.S)
- Originator
- American Geological Institute
- Originator
- Environmental Systems Research Institute (Redlands, Calif.)
- Publication Date
- 2003
- Title
- Global GIS : Drainage Basins
- Geospatial Data Presentation Form
- vector digital data
- Collection Title
- Global GIS : global coverage
- Publication Information
- Publication Place
- [Alexandria, VA]
- Publisher
- American Geological Institute
- Online Linkage
- https://hgl.harvard.edu/catalog/harvard-glb-hydbas
- Abstract
- This datalayer is a polygon coverage representing hydrologic drainage basins located worldwide. The data displayed here is derived from the HYDRO 1K Elevation Derivative Database. The drainage basins distributed with the HYDRO1k data set suite are derived using the vector stream networks along with the flow direction data set. Each polygon in the basin data set has been tagged with a Pfafstetter code uniquely identifying each sub-basin. HYDRO1k, developed at the U.S. Geological Survey's (USGS) EROS Data Center, is a geographic database providing comprehensive and consistent global coverage of topographically derived data sets. Developed from the USGS' recently released 30 arc-second digital elevation model (DEM) of the world (GTOPO30), HYDRO1k provides a standard suite of geo-referenced data sets (at a resolution of 1 km) that will be of value for all users who need to organize, evaluate, or process hydrologic information on a continental scale.
- Purpose
- The Hydro1k Drainage Basins are a general purpose global database designed to support Geographic Information Systems applications. This layer is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production. This layer will provide a basemap for layers related to socio-economic and political analysis, statistical enumeration and analysis, or to support graphical overlays and analysis with other spatial data. More advanced user applications may focus on demographics, urban and rural land use planning and related areas including defining boundaries, managing assets and facilities, integrating attribute databases with geographic features, spatial analysis, and presentation output.
- Supplemental Information
- Portions of this metadata are taken directly from the American Geological Institute, Global GIS, Web pages: http://www.agiweb.org/pubs/globalgis/
- Temporal Extent
- Currentness Reference
- publication date
- Time Instant
- 2003
- Bounding Box
- West
- -179.999347
- East
- 179.999000
- North
- 83.217361
- South
- -59.484882
- Theme Keyword
- Hydrology
- Watersheds
- Drainage
- Altitudes
- Theme Keyword Thesaurus
- LCSH
- ISO Topic Category
- inlandWaters
- elevation
- Place Keyword
- Earth
- Northern Hemisphere
- Southern Hemisphere
- Eastern Hemisphere
- Western Hemisphere
- Africa
- Asia
- Australia
- Europe
- North America
- South America
- Place Keyword Thesaurus
- LCSH
- Temporal Keyword
- Access Restrictions
- None.
- Use Restrictions
- For educational non-commercial use only. Harvard University makes no claims, no representations, and no warranties, express or implied, concerning the validity, the reliability or the accuracy of the GIS data and GIS data products furnished, including the implied validity of any uses of such data
- Status
- Complete
- Maintenance and Update Frequency
- None planned
- Point of Contact
- Contact Organization
- EROS Data Center
- Delivery Point
- Customer Services
- Delivery Point
- 47914 252nd Street
- Delivery Point
- U.S. Geological Survey
- Delivery Point
- Earth Resources Observation Science (EROS)
- Delivery Point
- 47914 252nd Street
- City
- Sioux Falls
- State
- SD
- Postal Code
- 57198-0001
- Country
- USA
- Contact Telephone
- 800-252-4547
- Contact Telephone
- 605-594-6151
- Contact Facsimile Telephone
- 605-594-6589
- Contact Electronic Mail Address
- custserv@usgs.gov
- Hours of Service
- Monday thru Friday, 8:00 a.m. to 4:00 p.m., central time -USA
- Credit
- Acknowledgement: Data available from USGS/EROS, Sioux Falls, SD.
- Native Data Set Environment
- Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 9.0.0.535
- Collection
- Originator
- American Geological Institute
- Originator
- Geological Survey (U.S)
- Originator
- Environmental Systems Research Institute (Redlands, Calif.)
- Originator
- Hearn, Paul P.
- Publication Date
- 2003
- Title
- Global GIS : global coverage
- Geospatial Data Presentation Form
- digital data
- Series Information
- Series Name
- U.S. Geological Survey digital data series
- Issue Identification
- DDS-62A-H
- Publication Information
- Publication Place
- [Alexandria, VA]
- Publisher
- American Geological Institute
- Other Citation Details
- 1 DVD-ROM; Developed by the U.S. Geological Survey; Published by the American Geological Institute; by P. Hearn ... [et al.].
- Data Quality Information
- Attribute Accuracy Report
- The drainage basins distributed with the HYDRO1k data set are derived using the vector streamlines along with the flow direction layer. The basins are seeded following procedures first articulated by Otto Pfafstetter, a Brazilian engineer, and adapted for use in the HYDRO1k data set (Verdin, 1997). Each polygon in the basin data set has been tagged with a Pfafstetter code uniquely identifying each sub-basin. The six-digit Pfafstetter code assigned to each basin carries basin linkage information. This permits determination of basin interconnectedness through simple examination of the Pfafstetter code. Please refer to the following (available in part via the USGS EROS websites) for more information on the Pfafstetter coding scheme: Pfafstetter, O., 1989, "Classification of hydrographic basins: coding methodology", unpublished manuscript, DNOS, August 18, 1989, Rio de Janeiro; translated by J.P. Verdin, U.S. Bureau of Reclamation, Brasilia, Brazil, September 5, 1991. Verdin, K., and S. Jenson, 1996, "Development of continental scale DEMs and extraction of hydrographic features", proceedings of the Third Conference on GIS and Environmental Modeling, Santa Fe, New Mexico, NCGIA.
- Logical Consistency Report
- Unknown
- Completeness Report
- Unknown
- Lineage
- Source
- Originator
- EROS Data Center
- Publication Date
- Unknown
- Title
- HYDRO1k elevation derivative database
- Geospatial Data Presentation Form
- digital data
- Publication Information
- Publication Place
- Sioux Falls, South Dakota
- Publisher
- LP DAAC
- Type of Source Media
- online
- Source Temporal Extent
- Time Period Information
- Single Date/Time
- Calendar Date
- unknown
- Source Currentness Reference
- publication date
- Contribution
- Source of derived data
- Source
- Originator
- Geological Survey (U.S.)
- Originator
- EROS Data Center
- Publication Date
- 1996
- Title
- GTOPO30
- Geospatial Data Presentation Form
- digital data
- Publication Information
- Publication Place
- Sioux Falls, South Dakota
- Publisher
- USGS EROS Data Center
- Type of Source Media
- online
- Source Temporal Extent
- Time Period Information
- Single Date/Time
- Calendar Date
- 1996
- Source Currentness Reference
- publication date
- Contribution
- Source of source data (Hydro 1k)
- Spatial Data Organization Information
- Direct Spatial Reference Method
- Vector
- Point and Vector Object Information
- SDTS Terms Description
- SDTS Point and Vector Object Type
- G-polygon
- Point and Vector Object Count
- 55853
- Spatial Reference Information
- Horizontal Coordinate System Definition
- Geographic
- Latitude Resolution
- 0.000001
- Longitude Resolution
- 0.000001
- Geographic Coordinate Units
- Decimal degrees
- Geodetic Model
- Horizontal Datum Name
- D_WGS_1984
- Ellipsoid Name
- WGS_1984
- Semi-major Axis
- 6378137.000000
- Denominator of Flattening Ratio
- 298.257224
- Vertical Coordinate System Definition
- Altitude System Definition
- Altitude Datum Name
- Unknown
- Altitude Resolution
- 1.000000
- Altitude Distance Units
- meters
- Altitude Encoding Method
- Explicit elevation coordinate included with horizontal coordinates
- Entity and Attribute Information
- Entity Type
- Entity Type Label
- Global GIS Hydrologic Drainage Basins
- Entity Type Definition
- Polygons describe drainage basins
- Entity Type Definition Source
- USGS
- Attributes
- LEVEL1
- Pfafstetter units of each polygon at the Level 1 Basin category. A System for Topologically Coding Global Drainage Basins and Stream Networks.
- Definition Source
- USGS/Verdin (1997)
- LEVEL2
- Pfafstetter units of each polygon at the Level 2 Sub-basin category. A System for Topologically Coding Global Drainage Basins and Stream Networks.
- Definition Source
- USGS/Verdin (1997)
- LEVEL3
- Pfafstetter units of each polygon at the Level 3 Sub-basin category. A System for Topologically Coding Global Drainage Basins and Stream Networks
- Definition Source
- USGS/Verdin (1997)
- LEVEL4
- Pfafstetter units of each polygon at the Level 4 Sub-basin category. A System for Topologically Coding Global Drainage Basins and Stream Networks
- Definition Source
- USGS/Verdin (1997)
- LEVEL5
- Pfafstetter units of each polygon at the Level 5 Sub-basin category. A System for Topologically Coding Global Drainage Basins and Stream Networks
- Definition Source
- USGS/Verdin (1997)
- LEVEL6
- Pfafstetter units of each polygon at the Level 6 Sub-basin category. A System for Topologically Coding Global Drainage Basins and Stream Networks
- Definition Source
- USGS/Verdin (1997)
- DEM_MEAN
- Mean elevation value within the subbasin (-130.8667 to 5474.2222 meters)
- Definition Source
- USGS
- DEM_STDEV
- Standard deviation of the elevations within the subbasin in meters (-1 to 1950.243 meters)
- Definition Source
- USGS
- SLOPE_MEAN
- Mean value of the slopes within the subbasin (degree) (-1 to 19.1389 degrees)
- Definition Source
- USGS
- SLOPE_STDE
- Standard deviation of the slopes within the subbasin (degree) (-1 to 13.9116 degrees)
- Definition Source
- USGS
- ASPECT_MEA
- Mean value of the aspects within the subbasin (degree from N) (-1 to 341.5651 degrees)
- Definition Source
- USGS
- ASPECT_STD
- Standard deviation of the aspects within the subbasin (degree from N) (-1 to 168.7602 degrees)
- Definition Source
- USGS
- CTI_MEAN
- Mean Value of the Compound Topographic Index. The CTI is calculated using the flow accumulation (FA) layer along with the slope as: CTI = ln ( FA / tan (slope)
- Definition Source
- USGS
- Attribute Value Accuracy Explanation
- CTI commonly referred to as the Wetness Index, is a function of the upstream contributing area and the slope of the landscape. In areas of no slope, a CTI value is obtained by substituting a slope of 0.001. This value is smaller than the smallest slope obtainable from a 1000 m data set with a 1 m vertical resolution.
- CTI_STDEV
- Standard deviation of the Compound Topographic Index. The CTI is calculated using the flow accumulation (FA) layer along with the slope as: CTI = ln ( FA / tan (slope)
- Definition Source
- USGS
- Attribute Value Accuracy Explanation
- CTI commonly referred to as the Wetness Index, is a function of the upstream contributing area and the slope of the landscape. In areas of no slope, a CTI value is obtained by substituting a slope of 0.001. This value is smaller than the smallest slope obtainable from a 1000 m data set with a 1 m vertical resolution.
- TIM.GLB_HYDBAS.AREA
- Feature area in meters squared. (43490.065 to 7608541524688.85 meters squared)
- Definition Source
- USGS
- PERIMETER
- Feature perimeter in meters (7365236.389 to 31216632.391 meters)
- Definition Source
- USGS
- SHAPE
- Feature geometry. (Coordinates defining the features.)
- Definition Source
- ESRI
- SHAPE.AREA
- Feature area in units squared (Positive real numbers that are automatically generated.)
- Definition Source
- ESRI
- SHAPE.LEN
- Feature length of feature in internal units (Positive real numbers that are automatically generated.)
- Definition Source
- ESRI
- SHAPE.FID
- Internal feature number. (Sequential unique whole numbers that are automatically generated.)
- Definition Source
- ESRI
- Distribution Information
- Format Name
- Shape
- Distributor
- Harvard Geospatial Library
- Online Access
- http://hgl.harvard.edu/
- Name
- Metadata Reference Information
- Metadata Date
- 20060117
- Metadata Contact
- Contact Information
- Contact Organization Primary
- Contact Organization
- Harvard Geospatial Library
- Contact Position
- Geospatial Resources Cataloger
- Contact Address
- Address
- Harvard University Library
- Address
- Office For Information Systems
- Address
- 1280 Massachusetts Avenue
- City
- Cambridge
- State or Province
- MA
- Postal Code
- 02138
- Country
- USA
- Contact Voice Telephone
- 617-495-2417
- Contact Facsimile Telephone
- 617-496-0440
- Contact Electronic Mail Address
- hgl_ref@hulmail.harvard.edu
- Hours of Service
- Monday - Friday, 9:00 am - 4:00 pm EST-USA
- Metadata Standard Name
- FGDC Content Standards for Digital Geospatial Metadata
- Metadata Standard Version
- FGDC-STD-001-1998
- Metadata Extensions
- Online Linkage
- http://www.esri.com/metadata/esriprof80.html
- Profile Name
- ESRI Metadata Profile
