Google maps - encoding individual waypoints

Question

I am trying to build up a string which will link directly to the Google maps print view.

e.g. http://maps.google.co.uk/maps?f=d&source=s_d&saddr=brixton&daddr=bath+to:bournemouth&hl=en&geocode=FUQ7EQMdyDr-_ym5RCh-QQR2SDGm1XOO93zFHA%3BFbQEEAMdMgfc_ykt4T50pnhxSDEJmm3W0CeLEw%3B&mra=ls&sll=51.75764,-1.241455&sspn=1.577728,3.812256&ie=UTF8&ll=51.139725,-1.241455&spn=1.599222,3.812256&t=h&z=9&layer=c&pw=2

To help I am using this wiki mapki.com/wiki/Google_Map_Parameters which explains what each of the paramaters means. The only parameter that is causing me a headache is "geocode". I can't find any documentation of how to get from the string "brixton" to "FUQ7EQMdyDr-_ym5RCh-QQR2SDGm1XOO93zFHA"

Is it anything to do with the Google Polyline Algorithm?