Is there a way to extract POI's from Garmin map format (mdx img tdb mdr)?

I've got the following files that are provided开发者_JS百科 in Garmin format:

1. file.img
2. file.MDX
3. file.TDB
4. file_mdr.img

I need to find a way to extract Points of Interests from these files. Do you know any library/technique to do that?

Thanks

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The OpenStreetMap community knows how those maps work, because they can make their own maps for them. Maybe there is a tool on their website that can extract the POIs from the files?