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Those are GIS format files
Greetings,
These files are Shapefiles and Info files for GIS software, most popularly ESRI's ArcView or ArcGIS (the newer version). These are costly programs and can be used as rudimentary navigation that provides a "moving map" - however, simple things like trip routing are much more difficult. There are several free Shapefile viewers that will allow you to see the graphics, but again, they will not provide more than rudimentary GPS functions.
Good Luck
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