This is a collection of geographical data providing the raw data for a
map of the world.  Each file consists of a sequence of line segments.
Each line segment has two points: x1 y1 and x2 y2, in that order.  For
example, the first line of Texas is:

-103.0034 36.4802 -102.1604 36.4937

representing a line segment from (x1, y1) = (-103.0034, 36.4802) to
the point (x2, y2) = (-102.1604, 36.4937). All information is in
longitude (x) and latitude (y), in the range of -179.14 to 190.37 for
longitude and 6.25 to 175.51 for latitude.

Two main data sets are provided: a world map (world) and a map of the
state boundaries of the United States (usa).  These are kept in
separate directories, usa and world.

The usa directory has the following files.  For each we also give its size
in bytes:

    6868 Alabama                   7196 Nebraska
    5544 Arizona                   2484 Nevada
   10336 Arkansas                  4216 New-Hampshire
   18648 California                6936 New-Jersey
    2700 Colorado                  3204 New-Mexico
    3060 Connecticut              16456 New-York
    3162 Delaware                 25738 North-Carolina
     306 District-of-Columbia      3572 North-Dakota
   29954 Florida                   8092 Ohio
   12886 Georgia                   9432 Oklahoma
    8532 Idaho                     8532 Oregon
   11730 Illinois                  5814 Pennsylvania
    8704 Indiana                   2210 Rhode-Island
    8908 Iowa                     10302 South-Carolina
    3858 Kansas                    5652 South-Dakota
   14994 Kentucky                 10268 Tennessee
   22338 Lousiana                 38524 Texas
   13532 Maine                     2088 Utah
   19210 Maryland                  4352 Vermont
    9622 Massachusetts            24820 Virginia
   28152 Michigan                 19476 Washington
   12920 Minnesota                13940 West-Virginia
   12954 Mississippi              13260 Wisconsin
   10370 Missouri                  2808 Wyoming
    8532 Montana


The world directory has the following files.

  200449 africa               73800 europe.pol
  189871 africa.pol          303072 greenland
  124230 antarctica         1206384 northamerica
  709587 asia                 14063 northamerica.pol
  112012 asia.pol             38663 pacifica
  169617 australia           377405 southamerica
  653704 europe               70479 southamerica.pol

Each file is the basic information for a continent.  The *.pol files contain
political boundaries.  If you want only natural boundaries, do not use the
*.pol files.  If you want all political boundaries, you must use both
files since most political boundaries are also natural boundaries.

These two main data sets were independently constructed.  As a result,
they do not completely match (or possibly there was considerable
continental drift between the the construction of the two of them).  I
don't know where the original data came from.  It has been processed
to get it into this form.  Although all data has 4 decimal places, I
doubt that it is that accurate.  Two decimal places is more probably
the limit of its accuracy.  Please do not use this data to determine
missile target coordinates.

Obvious sources of improvement:

	a. label areas
	b. change segments (of 2 points) to poly-segments (of n points)
	c. Add cities, rivers

James L. Peterson
Software Technology Program
MCC
Austin, Texas

james.peterson@mcc.com

15 Sept 1988