ditigising a map for a free data set.

If I use a nautical chart and digitise the coastline to some degree of precision, can I then slap my own (free) license on the data set? Or is that a partial `reproduction' that falls under the original's chart copyright? If getting the lat and lon of the coastline is considered a partial reprod

Re: ditigising a map for a free data set.

> > If I use a nautical chart and digitise the coastline to some > degree of precision, can I then slap my own (free) license on the > data set? > > Or is that a partial `reproduction' that falls under the > original's chart copyright? > > If getting the lat and lon of the coastline is considere