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. A detailed description of the coding scheme
can be found in Verdin. Additional attributes defining the characteristics of
each sub-basin have been developed.
Purpose
The Hydro1k Drainage Basins are a
general purpose global database designed to support
Geographic Information Systems applications.
Temporal Extent
Currentness Reference
unknown
Time Instant
unknown
Bounding Box
West
-179.999347
East
179.999000
North
83.217361
South
-59.484882
Theme Keyword
drainage basin
Theme Keyword Thesaurus
none
Place Keyword
Temporal Keyword
Access Restrictions
none
Use Restrictions
none
Status
Complete
Maintenance and Update Frequency
Unknown
Point of Contact
Delivery Point
47914 252nd Street.
City
Sioux Falls
State
SD
Postal Code
57198-0001
Country
USA
Native Data Set Environment
Microsoft Windows Vista Version 6.0 (Build 6001) Service Pack 1; ESRI ArcCatalog 9.3.0.1770
Data Quality Information
Horizontal Positional Accuracy Report
Global GIS Note: To help with space the polygons were generalized to reduce file
size. The polygons were generalized with a factor of 0.007 degrees, which would
allow shifts less than one kilometer at the equator. But in general there was
not a noticeable difference.
Lineage
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
0.000000
Longitude Resolution
0.000000
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
Entity and Attribute Information
Entity Type
Entity Type Label
world_drainbasins
Attributes
FID
Internal feature number. (Sequential unique whole numbers that are automatically generated.)
Definition Source
ESRI
Shape
Feature geometry. (Coordinates defining the features.)
Definition Source
ESRI
LEVEL1
Pfafstetter units of each polygon
LEVEL2
Pfafstetter units of each polygon
LEVEL3
Pfafstetter units of each polygon
LEVEL4
Pfafstetter units of each polygon
LEVEL5
Pfafstetter units of each polygon
LEVEL6
Pfafstetter units of each polygon
DEM_MEAN
Mean elevation value within the subbasin (m)
DEM_STDEV
Standard deviation of the elevations within the subbasin (m)
SLOPE_MEAN
Mean value of the slopes within the subbasin (degree)
SLOPE_STDE
Standard deviation of the slopes within the subbasin (degree)
ASPECT_MEA
Mean value of the aspects within the subbasin (degree from N)
ASPECT_STD
Standard deviation of the aspects within the subbasin (degree from N)
CTI_MEAN
unknown
CTI_STDEV
unknown
AREA
Area of polygon (m2)
PERIMETER
Perimeter of polygon (m)
Distribution Information
Name
Metadata Reference Information
Metadata Date
20081209
Metadata Contact
Contact Information
Contact Organization Primary
Contact Organization
EROS Data Center
Contact Person
REQUIRED: The person responsible for the metadata information.
Contact Address
City
REQUIRED: The city of the address.
State or Province
REQUIRED: The state or province of the address.
Postal Code
REQUIRED: The ZIP or other postal code of the address.
Contact Voice Telephone
REQUIRED: The telephone number by which individuals can speak to the organization or individual.
Metadata Standard Name
FGDC Content Standards for Digital Geospatial Metadata
