Preliminary decoding of junction data showed that for HERE, the .fjv and .fjw are in similar format (which confirmed that they looks similarly in vector format)
Here are the stats for HERE New Zealand 2016Q4
Spoiler: .
However, TomTom .fjv are quite different, they are indeed raster image
Here are the stats for TomTom New Zealand 2016.12 (I could not find TomTom .fjw files)
Spoiler: .
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