[OSM-talk] open data

[rob at robmyers.org]

Quoting Etienne <80n80n at gmail.com>:

> Rob, are you implying here that derived works do or do not have to be
> published under the same license (BY-SA) as the data from which they are
> derived?

If the data is SA'd then derivatives of it must be SA'd. This assumes that
geodata can be SA'd.

> In some ways I think we do want the data to escape.  The objectives of the
> foundation are to promote the creation and use of free data, not to create
> or preserve some kind of monoply.

If you allow data to be restricted (which Public Domain or BY do), then 
you are
allowing others to create monopolies. BY-SA alows data to be used in any way
that does not create a monopoly.

BY-SA doesn't cover trademarks, so artisanal cartographers can protect their
brand name and prevent direct copying to some extent at least by using
trademarks.

- Rob.