A polygon feature is characterised by a closed line, whose location and shape
is specified by a set of points, and descriptive attributes. The ASCII file may
have zero or two header lines. The first headerline must include the ID column
name and attribute field names, while the second headerline include the
co-ordinate column names. The next lines define the polygon features, where each
feature is defined with an attribute line, one co-ordinate line for each point
defining the polygon feature, and an 'end-of-feature' line. The attribute line
includes the feature ID and other attribute values for the polygon feature. The
'end-of-feature' line just includes the word END in the beginning of the line.
After reading this line, INSROP GIS interprets the next line as the attribute line
of the next polygon feature. See
To import polygon features from an ASCII file, choose the New Theme from ASCII file menu choice in the View menu in the view window.
Importing ASCII polygon features