Arc/Info GIS data

Baltic Sea Region GIS, Maps and Statistical Database
Administrative Units, Arable Lands, Land and Ocean (Coastline), Land Cover, Pasture Lands, Population Density, Sub-watershed Drainage Basins, Wetlands

All data sets are downloadable as compressed files in ZIP-format; each ZIP-file contains both documentation and data files. Please refer to the data descriptions and to the General Comments section at the bottom of this page for additional information about data files. Information about projection is at the bottom as well.

For additional datasets, see also the 'related data' page.

 If you have difficulties downloading (large) files, you may alternatively order a CD-ROM containing the same data. 

Administrative Units

The Administrative Units data consists of one Arc/Info export file, one description file, and one readme file.
Name Filename Filesize
Data description / Metadata admin500.txt
Admin as Arc/Info coverage admin.zip 2.1 mb

Arable lands

The Arable Lands is available as an Arc/Info grid, and as Erdas GIS data. For PC Arc/Info users, the data is available as four coverage tiles with the data as polygons.
Name Filename Filesize
Data description / Metadata arab_gis.txt
Arable as Arc/Info grid arable_grid.zip 30 kb
Arable as Erdas GIS arable_gis.zip 23 kb
Arable as Pc Arc/Info coverage tiles arable.zip 1.9 mb

Land and Ocean (Coastline)

The Land and Ocean (Coastline) data consists of one Arc/Info export file, one description file, and one readme file.
Name Filename Filesize
Data description / Metadata lnd_ocn.txt
Land and Ocean as Arc/Info coverage coast.zip 1.1 mb

Land Cover

The land cover is available as an Arc/Info grid, and as Erdas GIS data. For PC Arc/Info users, the data is available as four coverage tiles with the data as polygons (5 x 5 km square). For an updated dataset, with a higher resolution, see the 'related data' page.
Name Filename Filesize
Data description / Metadata land_gis.txt
Land Cover as Arc/Info grid land_grid.zip 600 kb
Land Cover as Erdas GIS land_gis.zip 603 kb
Land Cover as Pc Arc/Info coverage tiles landcov.zip 2.0 mb

Pasture Lands

The dataset is available as an Arc/Info grid, and as Erdas GIS data. For PC Arc/Info users, the data is available as four coverage tiles with the data as polygons.
Name Filename Filesize
Data description / Metadata past_gis.txt
Pasture as Arc/Info grid pasture_grid.zip 25 kb
Pasture as Erdas GIS pasture_gis.zip 18 kb
Pasture as Pc Arc/Info coverage tiles pasture.zip 1.3 mb


Population Density

Population density is available as an Arc/Info grid, and as Erdas GIS data. For PC Arc/Info users, the data is available as four coverage tiles with the data as polygons.
Name Filename Filesize
Data description / Metadata popd_gis.txt
Population as Arc/Info grid popdens_grid.zip 60 kb
Population as Erdas GIS popd_gis.zip 71 kb
Population as Pc Arc/Info coverage tiles popdens.zip 3.4 mb

Sub-watershed Drainage Basins

The Sub-watershed Drainage Basins data consists of one Arc/Info export file, one description file, and one readme file.
Name Filename Filesize
Data description / Metadata basins.txt
Sub-basins as Arc/Info coverage basins.zip 337 kb

Wetlands Distribution

The Wetlands Distribution data consists of an Arc/Info grid, but is also available as a coverage (vector/polygons). For an updated dataset, with a higher resolution, see the 'related data' page.
Name Filename Filesize
Data description / Metadata wetlands.txt
Wetlands as Arc/Info grid wetlands_grid.zip 9 kb
Wetlands as Arc/Info coverage wetlands.zip 38 kb

 

General Comments

Projection information

The projection used is a custom Lambert Azimuthal Equal Area projection using the following 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

The projection can be referenced as:

		PROJCS[
			"Baltic GIS",
			GEOGCS["GCS_International_1909",
			DATUM["D_International_1909",
			SPHEROID["International_1909",
			6378388.0,
			297.0]],
			PRIMEM["Greenwich",
			0.0],
			UNIT["Degree",
			0.0174532925199433]],
			PROJECTION["Lambert_Azimuthal_Equal_Area"],
			PARAMETER["False_Easting",
			0.0],
			PARAMETER["False_Northing",
			0.0],
			PARAMETER["Central_Meridian",
			20.0],
			PARAMETER["Latitude_Of_Origin",
			60.0],
			UNIT["Meter",
			1.0]
		]

You can put the above in a projection file, or download the same as baltic_gis.prj (projection file)

Coverage extent

All Baltic Sea drainage basin data sets are clipped to the following latitude / longitude coordinates:

Upper right corner: X = 40 - E, Y = 75 - N
Lower left corner: X = 0 - E, Y = 45 - N

All data sets in the Baltic Sea drainage basin database were re-projected onto the Lambert Azimuthal Equal Area projection system with the following coordinates:

Upper right corner: X = 1,000,000 , Y = 1,300,000
Lower left corner: X = -1,000,000 , Y = -1,300,000

Due to the 10%00 arcs per polygon limitation, some coverages had to be divided into tiles for PC Arc/Info users. Please refer to the Data description / Metadata files for individual tile boundaries.

Arc/Info grids

All grids were exported with full compression using Arc/Info 8 on Solaris.
Export files and associated Data description / Metadata files were ZIPped with PKZIP v.2.04g or WinZip v. 6.0a.

PC Arc/Info Coverages

All coverages were exported with no compression using PC Arc/Info Version 3.4D.
Export files and associated Data description / Metadata files were ZIPped with PKZIP v.2.04g or WinZip v. 6.0a.

ERDAS Version 7.4 GIS

These files were created using the IDRISI to ERDAS Version 7.4 conversion option in IDRISI 4.1.
The ERDAS files were compressed using PKzip Version 2.04g.
To convert an ERDAS .GIS file into an Arc/Info grid, use the IMAGEGRID command.
To convert from the Arc/Info grid to a polygon coverage, use GRIDPOLY command.
Refer to Data description / Metadata files for the item definitions.

Last Modified: 2001-Sep-23 19:23 by Hugo Ahlenius