Thales [W:Magellan Navigation] users must know MobileMapper Office. This software has a lot of capability as [W:GPS] software. It has many tools/utilities to manage our GPS-related data. The most important one for some people (including me) is its capability in creating a Magellan Basemap. It is much easier creating Magellan basemap rather than Garmin Basemap.
Try and explore MobileMapper Office Version 2.7