The maps are in a vector format stored as ESRI Shapefile spatial data format. The Shapefiles are most easily imported into ESRI's ArcView, but most other GIS packages can import ESRI Shapefiles. ESRI also provides a free basic GIS package, ArcExplorer, on the ESRI web site. Databases are stored as .dbf files. These can be imported into most spreadsheets and databases, and some GIS packages including ArcInfo.
Each Shapefile consists of three files: filename.dbf (attribute data), filename.shp (feature geometry) and filename.shx (feature geometry index). All maps were converted from e00 files to ESRI Shapefiles using the ARCSHAPE command. When necessary, field names in attribute tables were changed so that they conformed to the 10 character limit for field names in dBase .dbf
.
File names are:
ggd601_soil_russia.dbf |
soil attribute data |
ggd601_soil_russia.shp |
soil feature geometry |
ggd601_soil_russia.shx |
soil feature geometry index |
ggd601_soilnat_russia.dbf |
soil naturalness attribute data |
ggd601_soilnat_russia.shp |
soil naturalness feature geometry |
ggd601_soilnat_russia.shx |
soil naturalness feature geometry index |
profiles.dbf |
detailed soil profile database |
soil_adjusted_characteristics.dbf |
summary soil profile database |
Following is a quick tutorial for defining the projection of this data set in ArcGIS. These steps were tested with ArcGIS 9:
1. Open ArcToolbox. Select Data Management Tools --> Projections and Transformations --> Define Projection.
2. In the Define Projection window, select an input shapefile for the "Input Dataset or Feature Class" field. The "Coordinate System" field now says "Unknown." Click the icon to the right of the "Coordinate System" field.
3. In the Spatial Reference Properties window that appears, click Select to select a predefined coordinate system. Click Projected Coordinate Systems --> Polar. Select North Pole Lambert Azimuthal Equal Area.prj. Click Add.
4. Back in the Spatial Reference Properties window, click Modify. Change the parameters to the following:
False_Easting: 0.0
False_Northing: 0.0
Central_Meridian: 100.0
Latitude_Of_Origin: 45.0
Leave the "Linear Unit" as meters. In the "Geographic Coordinate System" section, click Modify. For "Datum" and "Spheroid" select <custom>. For "Semimajor axis" and "Semiminor axis" enter 6370997.24063. Click OK until the Define Projection wizard runs. The shapefiles are now projected.
Note: the Land Resources of Russia site defines the projection parameters as follows, for those who use the "projectdefine" Arc command:
Projection: Lambert Azimuthal
Units: Meters
Datum: None
Parameters:
6370997.24063 (radius of the sphere of reference)
100 0 0.000 (longitude of center of projection)
45 0 0.000 (latitude of center of projection)
0.00000 (false easting (meters))
0.00000 (false northing (meters))
While all spatial datasets on the "Land Resources of Russia" CD are stored in the Lambert Azimuthal projection, differences occur between the coverages in terms of resolution and scale. In particular, the outer boundary of Russia, islands, and water bodies may vary between data sets.