Formats available for input

Boundaries can be read in two formats:

E00 format

- this is supposed to be ASCII ARC/INFO coverage format. As this format is not officially documented by ESRI, no warranty can be given.

First and second lines of a file are:

EXP    Name_of_coverage
ARC

Then every polyline (polygon) has the header

I_ok dummy_I dummy_I dummy_I dummy_I dummy_I I_np

x-y coordinates follow then, with either one coordinate (two numbers) or two coordinates (four numbers) per line. I_np is a number of coordinates in that polyline. A polyline/polygon will be read in, if I_ok $>0$.

``plot'' format

- only polylines/polygons data without header.

For every polyline/polygon, the first line gives a number of points. x-y coordinates follow then, with either one coordinate (two numbers) or two coordinates (four numbers) in each line.

Coverage format is automatically recognized by EXP as the first word of a file.