----- Original Message -----
From: "Ian Sergeant" <[email protected]>
To: "Mark Pulley" <[email protected]>
Cc: <[email protected]>
Sent: Wednesday, March 28, 2012 3:29 AM
Subject: Re: [talk-au] Effect of license change
On 28 March 2012 13:03, Mark Pulley <[email protected]> wrote:
1. Should we import the new ABS boundaries now (as the old ones will go),
then use this data to create a new coastline? (This will also be useful
in
recreating rivers/creeks that currently use ABS data - although it looks
like there won't be time before April 1st to do this.)
If the current timetable is maintained, then this isn't going to be a
practical solution. During the time that the deletion is taking place, it
may not even be practical for reasons of possible conflicts.
However, don't forget that the coastline shape files are generated as a
separate process right now, and I'm hoping that we won't go through the
process of recreating those which flood half the world.
I'm really hoping that for a long time after 1 April the sysadmins do keep
the current CC-BY-SA coastline files which are used to generate the
coastline outline in the Mapnik layer. However we must remember that there
are other users of OSM data, and these users may generate their coastline
directly from the planet file
I'm kinda assuming
worst case that someone will simply insert PGS data into the missing
sections before regenerating them. This should give us more time to do
the
right thing here.
Firstly who is this "someone" ? I may be wrong but I don't expect the
sysadmins will do it, so it will come down to "ordinary" OSM users to add
this back into OSM. I think I can relatively easily re-import PGS coastline
data ( I recently did a re-import of some PGS data in the Arabian Gulf) ,
though it may be a little time consuming. But the question then comes back
to: should the PGS data be imported as a short term fix, or is it better to
wait until someone has more time to import ABS?
If it is suggested that PGS be re-imported, then I presume it will best to
wait till after the new database goes live? It seems a pity to start
deleting good data from OSM now, given that this will degrade the last
available CC-BY-SA planet file.
David
This is why my thinking is that there are other priorities over
coastlines.
Also, have a look at the AGRI data for rivers and creeks outside of urban
areas. It appears better than the ABS data in most cases I have looked
at. It is good for coastlines too.
2. Should we undelete the previous ways that formed the coastline (as in
some areas these were deleted when the ABS data was incorporated into the
coastline)? (I don't know if the old coastline data is compliant or not.)
(Should we also do this for the state boundaries?)
No coastline was automatically deleted when the ABS2006 data was imported,
so its all a lovely mangle of moves, inserts, splits, original PGS, yahoo,
ABS, bing and nearmap.
Finding nicely deleted ways is rare, and pulling back older longer
versions
of trimmed ways via the API I've found to be extraordinarily difficult.
Ian.
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