Google maps and Google Earth seem to quickly establish themselves as commonly used mapping tools. GMAP provides the conversion from Nordic format (s-files) to the input format required by these systems, which is the Keyhole Markup Language (KML). GMAP also convert SEISAN station and polygon files. The input format of Google Earth is described on http://earth.google.com/kml/. GMAP required Google Earth installed on your system to plot the output file. Download Google Earth here http://earth.google.com/download-earth.html (note the terms and conditions on http://pack.google.com/intl/en/eula_print_us.html). To change the color codes se e.g. http://html-color-codes.info/. See also chapter 3.7.
GMAP can run in three modes: