These are Garmin binary coordinates, see for [Only registered and activated users can see links. ].

I have tested this with Topo Austria v3 using database '010-D1199-00.db'. In a program called 'sqlitebrowser' I searched for a known trail called 'Sonnblick
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which has id 121496.

The borders of this trail are given with binary coordinates
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which are converted to
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And look at the map: you will find that these values are true.

And you can get more segments and binary coordinates of this trail with
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