Title: Nations - World Political Boundaries ( Political Boundaries )
Type of Map: cell Number of Categories: 199
Rows: 2250
Columns: 4500
Total Cells: 10125000
Data Source:
From a Vector Map
Comments:
This file came from a digitized file of the political
boundaries of the world. The scale of the map was 1:40,000,000
with a date of 1 Jan. 1982. The projection was a Miller
Cylindrical projection. The file was converted to a geographic
projection using vect.geo.
The error in this map could be greater than 1 cell.
Some of the small island nations were too small to digitize
and thus are not present.
This layer was digitized from a paper map in the University of
Illinois library. The map had no copyright or author.
Processing to GRASS format by D. Knapp and R. Lozar
Edited by M. Anderson
at Construction Eng. Research Lab, Champaign, IL