What : A GPS simulator
Where : http://users.hol.gr/~dzach/gpsfeed/index.html Description : GPSFeed is a software GPS simulator, a utility that feeds the PC with continuous GPS data as if it were traveling in a car or airplane. NMEA 0183 GPS sentences are sent to the application through a socket (TCP/IP) connection. It also outputs the same NMEA data to a serial port of the PC. Created : 24-Mar-2005
GPSFeed looks like this in Linux KDE, running spiral track shape.
This is another interesting track shape (here period=1, skip=50)