[talk-au] cc-by not compatible with ODBL ?

[John Smith]

On 8 July 2010 17:16, Neil Penman <ianaf4you at yahoo.com> wrote:
>
> Useful as some govt or corporate contributed data may be the really valuable data is that contributed by individual mappers.  One of the things that set OSM apart from other maps was that although it might have had data missing, what was there was pretty accurate.  With the contribution of data from other sources we are losing some of that quality.  I have found numerous cases where towns have two police stations marked.  One in the correct spot, added by a mapper, and one in some other arbitrary place added by a bulk upload.  I'm not totally against this, but ultimately its community contribution that distinguishes OSM from other maps.

While the import of police stations, and fuel locations, may have
lacked in accuracy they will have included meta data that is also
potentially useful, but they also may prompt people to fix or add
other POIs that they may not have if they hadn't noticed the errors...

You can't say all imports will be lower quality than what exists in
OSM, it all depends on the source of the data, both what is already in
OSM and the source used to make the dataset you are comparing against.
If you noticed I didn't try to bulk import the Qld state controlled
roads data set, because I knew there would a lot of existing
duplication, but the meta information is pretty valuable, and
replacing some existing data was useful as well, since it was more
accurate than landsat and even some roads traced from GPS tracks, not
all GPS devices are created equal. :)