METADATA FILE

I.  General description of data set
-----------------------------------

Name
	Sub-watershed Drainage Basins for Baltic Sea drainage basin region

Geographic Level
	Regional

Specific Area
	Baltic Sea drainage basin region

Lat/Long Region Boundaries
	NW-X:           0-E     ,       SW-X:           0-E
	NW-Y:           75-N    ,       SW-Y:           45-N
	SE-X:           40-E    ,       NE-X:           40-E
	SE-Y:           45-N    ,       NE-Y:           75-N

Infoterra Keyword(s)
	Watershed management (12670)
	Natural drainage systems (13140)
	Catchment areas (13210)
	Run-off and seepage (13326)
	Inorganic pollutants (22134)
	Land pollution (12124)
	Human population (14213)

Other Keyword(s)
	Nutrient loading, land cover, population 

Primary Data Acquisition Period
	(See GTOPO30 source information)

Supplier
	GRID-Arendal. Service Box 706. N-4808 Arendal, Norway.

Contributor
	BALANS consortium (Metria Miljöanalys, Finnish Environment Insitute, Novosat Oy, GRID-Arendal, GRID-Warsaw, and Swedish Meterological and Hydrological Institute)

Publication Reference
	Hydro1k
		http://edcdaac.usgs.gov/gtopo30/hydro/
	GTOPO30
		http://edcdaac.usgs.gov/gtopo30/

Documentation (overview)
		Examination of the existing drainage basin delineation
	at "Baltic Sea region GIS, maps and statistical database"
	(digitized after a drainage basin definition done in 1986)
	in comparison with the Hydro1k drainage basins came out in
	favor of the latter. Hydro1k is derived from the GTOPO30
	elevation model, with 30 arc seconds resolution.
		For use with the existing datasets in the
	"Baltic Sea region GIS, maps and statistical database" a
	subset of Hydro1k for the Baltic Sea drainage basin has been
	prepared. Minor editing has been done to the data, to adjust
	to the previous drainage basin definition, as well as using
	some drainage basin data from MapBSR.
		Those corrections were done in adding vectors from the 
	two these mentioned data set. Arcs were rasterised 
	cell'size = 100) before being implemented and adjusted in
	the Hydro1k data set, in respect of copyrights.
		The external boundaries are from the "Sub-watershed
	Drainage Basin for Baltic Sea drainage basin region". 

Contact information
	Hugo Ahlenius                           phone:  +47-370-35650 
	UNEP/GRID-Arendal                       fax:    +47-370-35050 
	                                        e-mail: mapmaster@grida.no
	
   

II.  Detailed description of data set (members)
-----------------------------------------------

Data set type
	Polygon vector dataset

Description
	BASINS - Sub-watershed Drainage Basins for whole Baltic region

Access
	Free access, unrestricted

Copies (available sites)
	CD-ROM - being distributed by GRID-Arendal
	World Wide Web (WWW), GRID-Arendal
		URL:  http://www.grida.no/


III. Technical information about raster data:
---------------------------------------------

Source Data sets
	Hydro1K, USGS
	MapBSR, MapBSR consortium
	Sub-watershed Drainage Basins for whole Baltic region, Baltic Drainage Basin 
	
Scale/Resolution
	Drainage basins modelled on 30 arc seconds raster elevation model

Number of Polygons
	106

Feature Type
	Polygon

Projection Name
	Lambert Azimuthal Equal Area

Projection Parameters
	Units: meters
	Spheroid: International 1909
	Radius: 6,378,388
	Longitude of centre of projection: 20.00.00
	Latitude of centre of projection:  60.00.00
	False Easting: 0
	False Northing: 0

Projection boundaries
	Xmin: -1,000,000        Ymin: -1,300,000 
	Xmax:  1,000,000        Ymax:  1,300,000

Attribute Fields
	Sea		0 for land, 1 for water
	Maj_id		Unique ID for the major sub-order of basin
	Min_id		Unique ID for the minor sub-order of basin
	Name		Label of the major sub-order of drainage basin, or water basin


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Last Modified: 2001-Sep-04 12:33