Hello,
It is currently not planned to offer the precise location of all tracks and métro platforms as open data, since our open data is available mainly to simplify the development of applications that facilitate the travelling and commute of our customers. However, to that end, we do offer the location of métro stations (and the bird's-eye route between stations) as open data via our web page for developers (http://www.stm.info/en/about/developers).
Best regards,
The STM team