[Talk-ca] Adressing

[john whelan]

The note came from me, the problem is two fold, the first is every
section of a road junction gets addressing information so a slip road
that is 20 meters long perhaps gets addressing information when it has
no buildings and the addressing information contains either 0 or -1
this basically adds noise to the map.  One Ottawa tile 031G05.2.0.3
for example has 1,377 address nodes, but only 1,058 nodes actually
have a house number in them.

The other side of the coin is in some places these address nodes are
useful since they contain the street name, its one way I've been
identifying streets which are incorrectly named in Ottawa and also
streets which are in totally the wrong place.  I verify the street
name before making a change but so far CANVEC street names have been
very accurate.

I just have a concern based on my estimate of more than a 100 streets
that I've found with the wrong street name in Ottawa so far about the
quality of the rest.  I wouldn't like to have to depend 100% on
Openstreetmap to find a street in Ottawa.

My background is mixed, I spent some time working on an
interdepartmental committee for addressing standards with Treasury
Board and Canada Post, throw in a bit of big database stuff and XML
etc. plus the fact I'm fairly blunt and you get me.  The positive side
is I have reasonable technical knowledge so can suggest things such as
Skype to Sam and quite often if I identify a problem things can
improve, such as the Canadian Postcodes that now work beautifully in
Nominatim, the negative side is I am not always so good on the
politically correct statement side as I'm sure Sam will agree.

My recommendation would be to leave the information as it is.  It
doesn't take long to run the select statements in JOSM and having the
raw data available means it is easier to tag a name onto a street.
Especially true if we try to protect the existing data ie existing
streets and don't wipe them out and replace them which is what I'd
dearly love to do.  Yes OSM has one or two streets or sections that
aren't in CANVEC but overall reliability of the product which is what
end users are interested in would be much better.

Cheerio John




On 26 August 2010 12:20, Bégin, Daniel <Daniel.Begin at rncan-nrcan.gc.ca> wrote:
> Hi Sam,
>
> I've just seen you wiki note  (http://wiki.openstreetmap.org/wiki/CanVec)
> for JOSM, about addressing  ...
>
> "In JOSM load the CANVEC osm file  [...]  addr:housenumber=0"
>
> Why is that?  Something that should have been modified before creating the
> product?  Please explain the expected result so I can change the process for
> the next release.
>
> Daniel
>
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