Re: [Talk-ca] CANVEC Comments

[Tyler Gunn]

If you draw a selection box over where the two tiles meet and run the validator 
in Josm one of the errors it can report is "duplicate nodes".  When you are 
merging tiles where roads and areas are split between the tiles there is a copy 
of all nodes on the "border" between the tiles in each file.  Josm Recognizes 
this and can merge the nodes from both tiles so there are no duplicates.  


Sent from my iPhon

On 2010-07-29, at 7:56 PM, john whelan  wrote:

> Sounds simple but Shift-J doesn't seem to do anything, they don't
> quite overlap.  What is a duplicate node error and how do I fix it?
> 
> Thanks John
> 
>> - Select the data all along the boundaries of the tile.
>> - Use the JOSM Validator on the selection.
>> - Fix all the duplicate node errors.
>> - Select both ways that make up the building/area (ie shift-click on both
>> parts of the building) and hit SHIFT-J to execute the "Join overlapping
>> areas"
>> - Voila!

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Re: [Talk-ca] OpenStreetMap Canada Facebook Page

[Sam Vekemans]

Hi all,
Im wondering if someone can add me back as an admin to the facebook
page.  It appears that i was removed by someone.  (with no explanation
given)
http://www.facebook.com/pages/OpenStreetMap-Canada/129173017125834

The idea is that the page should work in the same way that the OSM
wiki works, where everyone is free to contribute and discuss ideas.

Yesterday i added a custom facebook page box, where fbhtml can be
used, so i think it's possable to show images.  So i wanted to show
those same images that are on the openstreetmap.ca website.

I also added a tab for 'Events' so anyone can add in their events, so
everyone can be aware of whats going on.

Its fine if people don't want me to be an admin, but an explanation
should be given, as thats more appropriate.


...
On a lighter note, Nicolas Marchildon (who is not an admin yet) but
should be.  Posted this website.
Of immediate interest was this question about CanVec
http://gis.stackexchange.com/questions/478/canvec-why-so-quiet-where-are-all-the-users

I'm just going to answer that one now :)

Cheers,
Sam

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Re: [Talk-ca] CANVEC Comments

[john whelan]

Sounds simple but Shift-J doesn't seem to do anything, they don't
quite overlap.  What is a duplicate node error and how do I fix it?

Thanks John

> - Select the data all along the boundaries of the tile.
> - Use the JOSM Validator on the selection.
> - Fix all the duplicate node errors.
> - Select both ways that make up the building/area (ie shift-click on both
> parts of the building) and hit SHIFT-J to execute the "Join overlapping
> areas"
> - Voila!

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Re: [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  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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Re: [Talk-ca] CANVEC Comments

[Tyler Gunn]

On Thu, 29 Jul 2010 12:35:27 -0400, john whelan 
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?

The best way to accomplish this:
- Select the data all along the boundaries of the tile. 
- Use the JOSM Validator on the selection.
- Fix all the duplicate node errors.
- Select both ways that make up the building/area (ie shift-click on both
parts of the building) and hit SHIFT-J to execute the "Join overlapping
areas" 
- Voila!


> 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.

I hear you; Winnipeg's road network was hand-drawn by someone in Potlatch,
and there are a LOT OF places where roads overlap but don't connect, etc. 
The Canvec data is definitely higher quality in that regard.  It's this
manual merging headache that made me more to rural MB for a little while. 
Lol, it's easy to add in the Canvec data when there is no data there
already. :)

Tyler

-- 
--
Tyler Gunn
ty...@egunn.com

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[Talk-ca] CANVEC Comments

[john whelan]

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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Re: [Talk-ca] Joining Trails to roads.

[G. Michael Carter]

That sites assume!   Most problems you can't obviously see, so it's
going to be a big help.   How often is the data updated?

On 29/07/10 09:50 AM, john whelan wrote:
I use IE with http://keepright.ipax.at it finds
all sorts of things that need correcting but you can limit it to pick
out these.  Getting hold of all the editors in a particular region,
very unlikely some only edit for one session for a start.
  
Cheerio John
  
  
  
  On 29 July 2010 09:24, G. Michael Carter 
wrote:
  
As my previous e-mail I've
been playing around with routing based on
pedestrian and cycling.   I'd say, in my area, 1 in 20 trails are
connected to the roads.   I checked the Toronto and Brampton area. 
Same issue.

Trails that cross roads, need to have a connecting node.   Also they
need to join up with a road.  Most trails don't join with the road but
they need to for the routing to work.   Also my solution for trails
that end at a parking lot.  I've been just pulling the trail around the
perimeter of the parking lot till we get to the road.  (that way
routing works)

Since I didn't know trails needed to be connected to roads, I thought
I'd mention it.   Is there any way we can reach all the editors of the
GTA area?  As they have a lot of trails falling in this category.

Example:




Michael


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Contact: H: 1-519-940-8935 | W: 1-905-267-8494 | M: 1-519-215-1869 | F:
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Google Talk: xmpp:mikeycarter1...@gmail.com






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Re: [Talk-ca] Joining Trails to roads.

[john whelan]

I use IE with http://keepright.ipax.at it finds all sorts of things that
need correcting but you can limit it to pick out these.  Getting hold of all
the editors in a particular region, very unlikely some only edit for one
session for a start.

Cheerio John



On 29 July 2010 09:24, G. Michael Carter  wrote:

>  As my previous e-mail I've been playing around with routing based on
> pedestrian and cycling.   I'd say, in my area, 1 in 20 trails are connected
> to the roads.   I checked the Toronto and Brampton area.  Same issue.
>
> Trails that cross roads, need to have a connecting node.   Also they need
> to join up with a road.  Most trails don't join with the road but they need
> to for the routing to work.   Also my solution for trails that end at a
> parking lot.  I've been just pulling the trail around the perimeter of the
> parking lot till we get to the road.  (that way routing works)
>
> Since I didn't know trails needed to be connected to roads, I thought I'd
> mention it.   Is there any way we can reach all the editors of the GTA
> area?  As they have a lot of trails falling in this category.
>
> Example:
>
> [image: before][image: After]
>
>
> Michael
>
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[Talk-ca] Joining Trails to roads.

[G. Michael Carter]

As my previous e-mail I've been playing around with routing based on
pedestrian and cycling.   I'd say, in my area, 1 in 20 trails are
connected to the roads.   I checked the Toronto and Brampton area. 
Same issue.

Trails that cross roads, need to have a connecting node.   Also they
need to join up with a road.  Most trails don't join with the road but
they need to for the routing to work.   Also my solution for trails
that end at a parking lot.  I've been just pulling the trail around the
perimeter of the parking lot till we get to the road.  (that way
routing works)

Since I didn't know trails needed to be connected to roads, I thought
I'd mention it.   Is there any way we can reach all the editors of the
GTA area?  As they have a lot of trails falling in this category.

Example:




Michael


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