[OSM-dev] Deleting TIGER node tags

[Minh Nguyen]

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. :)

-- 
Minh Nguyen <mxn at zoomtown.com>
[[en:User:Mxn]] [[vi:User:Mxn]] [[m:User:Mxn]]
AIM: trycom2000; Jabber: mxn at 1ec5.org; Blog: http://notes.1ec5.org/