[Talk-ca] CANVEC Comments

[Michael Barabanov]

Hi John,

With respect to buildings being split, perhaps it would make sense to
regenerate .osm using larger tiles (or even generate .osm for whole
provinces?)  It's easy enough to split them with osmosis at home if needed.
As for hand-drawn vs imported, it's a sensitive topic; there's a danger of
starting a holy war:)  I for one agree with you, geobase/canvec is
topologically correct and is pretty much ready to use.

I'd say, if you're local to the area, just do what you think is best. If you
do delete exising roads in favor of canvec, please check if someone has
added oneway= tags or some other potentially useful tags (find in Josm works
well) and transfer them to new streets.

Michael.

On Thu, Jul 29, 2010 at 9:35 AM, john whelan <jwhelan0112 at gmail.com> wrote:

> The new Canvec tiles are very good quality wise.  However when a
> building or park is on two tiles it would be nice to combine the two
> parts so it gets one name etc.  Has anyone worked out how to do this
> in JOSM?
>
> I use http://keepright.ipax.at to clean up Ottawa's existing roads and
> I've spent many many hours connecting street junctions and floating
> islands but I know I still have many more hours of manual clean up
> ahead of me.  What I find the most difficult are the streets that have
> been wrongly named.  Street qualifiers are the normal source but a few
> times now I've come across three streets merged into one and given a
> single name.  Very difficult to pick out and correct.  The numerous
> streets with no name are easier to fix and the easiest source to use
> for this is the CANVEC data.
>
> What I find frustrating is the CANVEC data for roads appears to be
> almost spot on.  I've come across two minor places where it doesn't
> include a new road or part of an existing dirt track but if we were to
> totally replace the existing road network in Ottawa with the CANVEC
> data the quality of the map would be much higher plus you could then
> run routing software on it and it would save me a fair amount of clean
> up effort.
>
> Most of the value add in OSM comes from POIs that are not part of the
> road network so that value would remain.
>
> Cheerio John
>
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