Files with kmtf file extension can be found as GPS maps for Garmin Nuvi navigation.
KMTF file extension - Garmin Nuvi GPS map
What is kmtf file? How to open kmtf files?
File type specification:
The kmtf file extension is related to GPS navigation from Nuvi line developed by Garmin.
These kmtf files contains GPS maps for Nuvi devices. Looks like XML based format.
This kmtf file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.