Hello I have been creating maps (non routable) for the Nuvi series GPS for many years using MapSource and GPX2IMG applications and it has served me well.

I am now trying to create maps for a Drive 61 and the maps are not loading, it appears they use a different map file format or possibly more.

Could someone describe the Drive series map file format and tools used to create a map? If possible I would like to be able to make the routable.

Thank You

~ Phil