I would happy to see them mapped, even knowing that they can’t be accurate and can be changed. This will give me a knowledge that some area does have minefields and I should be more careful here and always check all signs.
About preserving data - you can add a back-reference in osm to your imported data and from time to time do import-like simulation to check that polygons are still exists and they are intact.
It would be great if the raw dataset could be published somewhere in a manner that any OSM client app can use it… I wouldn’t mind telling osmand to download third party map data from somewhere that isn’t editable by anyone with an email address, if that meant osmand would tell me about minefields.
@zstadler If you could publish the raw data we can look at hosting it in a way that users can add it to OSM maps. If you would like to share it privately instead you can send it to me at my username (at) gmail.com