[Imports] [Talk-ca] Modifying GeoBase Ways.

[Anthony]

On Fri, Nov 20, 2009 at 8:56 AM, Greg Troxel <gdt at ir.bbn.com> wrote:
> I agree that the created_by tag isn't useful, but a tag that says
>
> source=canvec_import_20091120
>
> or some such on the point/way/relation can be used to see if the way has
> been edited since import,

How so?  The way you check if a way has been edited since import is by
checking if version=1.

> and to find the original data for the 3-way
> automated merge (someday).  It being only on the changeset seems
> awkward.

The importer should be keeping track of what it has imported and when
it has imported it.  There's no technical reason this needs to be part
of the OSM database in the first place.

The current implementation of source tags isn't very good.  The source
for a modification doesn't change, and if data isn't supposed to be
editable, it shouldn't be in a place where data can be edited.  It's
history data, it should be in the history.

Ideally, you could put the tag in the changeset or on a particular
feature, and it would get saved, once, as part of the history.  Then
when you selected a feature and clicked history you'd see <<version=1,
source=canvec_20091120; version 2, source=local knowledge; version 3
[no source tag]; version 4, source=yahoo; etc>>.  That's better than
version=4, source=canvec_20091120;local knowledge;yahoo.