file AREADME.TXT

Plot software for compressed coastline files using Borland Turbo C

PLOT.C- main program- illustrates how to call WDBPLTC.C

WDBPLTC.C- function to be called from the user's program to access
  the coastline file, extract a geographic window of data and call
  CURVE.C to plot each string of geographic points.  It requires the
  memory handling functions in UTIL.C.  Modifications from the original
  by Jan Depner include dynamic memory allocation
  and removal of internal map projection.

CURVE.C- function called from WDBPLTC.C- this function should be customized
  for the user's application.  It typically calls a map projection to
  convert the geocoordinates to plotting coordinates and calls a plotting
  routine to plot them.

UTIL.C- these functions are called from within WDBPLTC.C to allocate
  and free up memory,  give the operator a chance to abort the drawing, etc.

IPROJ.C- is a map projection utility that performs conversion between
  geocoordinates and plotting coordinates.  This demo uses just the
  Linear (lat lon linear plot).

GTCLIB.C- these functions interface to the Turbo C library to perform
  graphics functions.  Not all of these functions are used in this demo.

EGAVGA.BGI- is the Turbo C graphics driver.