[OSM-talk-ie] error correction of data in downloaded ireland-northern-ireland.osm.pbf

[moltonel 3x Combo]

On 12/05/2015, Killian Driscoll <killiandriscoll at gmail.com> wrote:
> I downloaded the ireland-northern-ireland.osm.pbf and noted some errors,
> e.g. in polygon layer column "place" one row of 'locality is misspelt  as
> 'lcoality'.
> What should I do for this? Go to the instance on osm online and edit?

Yes. One should be cautious when correcting tags (is it really an
error ? did the contributor have a differnet meaning in mind ? Did he
make similar edits elsewhere ?) but "place=lcoality" clearly looks
like a simple typo.

Another way to spot the error is to use taginfo:
http://taginfo.openstreetmap.ie/keys/place#values then click the
typo-ed value, click the "overpass turbo" link and then "export ->
josm".


> Also, if I run a filter in QGIS: "natural" = 'water' AND "water" IS NULL it
> returns 7574 rows, including major lakes such as Lough Neagh, Gill, Conn
> etc. Does this mean that these are errors, i.e. that the record is
> incomplete and the column 'water' hasn't been filled in correctly? Or am I
> missing something here?

It's not an error, just data that isn't as complete as you'd like. A
lot of OSM data doesn't specify beyond "natural=water". It'd be nice
to be more specific, but the  different tagging schemas haven't fully
settled, there is a lot of historical data, etc.

http://wiki.openstreetmap.org/wiki/Water
http://wiki.openstreetmap.org/wiki/Tag:natural=water
http://wiki.openstreetmap.org/wiki/Key:water
http://wiki.openstreetmap.org/wiki/Tag:waterway=riverbank