[OSM-dev] Deleting TIGER node tags

[Dave Stubbs]

2009/6/27 Minh Nguyen <mxn at zoomtown.com>:
> Ngày 6/26/09 12:59 PM, Andy Allan viết:
>> Hello Devs,
>>
>> source = tiger_import_dch_v0.6_20070813
>> tiger:county = St. Louis, MO
>> tiger:tlid = 100111260:100111261:100111155:100111159
>> tiger:upload_uuid = bulk_upload.pl-6143e1a9-589d-43a0-9248-e95658773ef4
>>
>> Stuff like this appears on every node in the US, which is a pain. I
>> reckon it's all pointless, since all that info is on the ways in the
>> first place, and it's worth deleting them. Here's some numbers from
>> Matt to consider:
>>
>> Tiger node tags make up 85.43% of all node tags and take up:
>>
>>      * 12.97% of the bzipped planet size (805Mb).
>>      * 34.68% of the uncompressed planet size.
>>      * 42.20% of the lines in the planet.
>>      * 31.51% of the parsing time of the planet (based on xmllint --stream).
>>
>> So, can anyone think of a good reason to keep them? Should we just
>> delete tags like these? I'd love to hear if anyone think we should
>> keep them (bearing in mind all the info, including ids, would remain
>> on the ways in any case).
>>
>> http://wiki.openstreetmap.org/wiki/TIGER_fixup/node_tags
>>
>> Cheers,
>> Andy
>
> The tiger:county data is actually kinda useful. I've been using it to
> know where the county lines are according to TIGER, to make the county
> boundaries more precise in my area.
>
> It's also nice to see tiger:county values on nearby streets when mapping
> power lines in Potlatch, so I know just how carried away I got without
> having to leave the editor and zoom way out. But that's probably a
> fringe usage. :)
>

Andy's only talking about the node tags at the moment -- this data
will still be on the ways for now so you'll still be able to do these
things.

Dave