A htf file extension is related to the some kind of GIS file format.
HTF file extension - GIS format
What is htf file? How to open htf files?
File type specification:
The htf file extension is used for some sort of specialized GIS (geographic information system) format used to store geographic data for various GPS and GIS and navigation applications and devices.
This htf 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.
