Re: [Talk-GB] Question regarding mapping inaccuracies.

[Andrew M. Bishop]

Shaun McDonald  writes:

> I'm wondering if someone will be able to implement an efficient
> version of the snooker ball visualisation on 
> http://www.cyclestreets.net/blog/2009/03/26/thats-a-really-odd-route/

>> As a quick hack I have generated such a map for the UK.
>>
>> http://www.gedanken.org.uk/mapping/osm-junctions/junctions.html
>>
>> The junction data comes from Routino[1] and as such not all highway
>> junctions are included (only highways that are routable).  The
>> rendering is performed client-side so is rather slow (probably my
>> Javascript isn't optimum).  The server will only allow downloading a
>> limited amount of data at a time so I recommend you zoom in to the
>> highest or penultimate zoom level.
>>
>
> Nice start.
>
> I'd like to be able to zoom in more, particularly in central London.  
> I've also found that clicking "Get Junctions" often gets an area,  
> where only a little bit is visible at the highest zoom, and you have  
> to pan and re-request to get for the current area. I'd also like a  
> permalink, and a link to the osm site for easy editing.

I did say that it was a quick hack :-)

I have limited the depth of zoom because I am caching tiles from the
main openstreetmap tile server and don't want to overload them with
requests.  The maximum zoom is 15.

The data that you get when you press the button is from all of the
zoom 13 tiles that are completely visible within the map window in the
browser.  If you have zoomed in too far for any whole tiles to be
visible you get one tile's worth of data.  If you zoom out you
obviously get more, but the server won't send more than a 3x3 area to
avoid swamping the user.

I have added a permalink and a link to the main OSM site for editing.

-- 
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--
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Re: [Talk-GB] Question regarding mapping inaccuracies.

[Shaun McDonald]

On 31 May 2009, at 15:11, Andrew M. Bishop wrote:


Shaun McDonald  writes:


On 29 May 2009, at 20:23, Peter Miller wrote:


On 29 May 2009, at 15:42, Shaun McDonald wrote:


I'm wondering if someone will be able to implement an efficient
version of the snooker ball visualisation on 
http://www.cyclestreets.net/blog/2009/03/26/thats-a-really-odd-route/


That's very useful. Is it possible for anyone to view that mapping
view through Cycle Streets?


No due to reasons of poor performance, hence why I'm asking is  
someone

else would be interested in implementing something similar with far
better performance and global coverage. The original authors would be
really happy to see it implemented elsewhere, as it would bring great
benefits to the OSM data.


As a quick hack I have generated such a map for the UK.

http://www.gedanken.org.uk/mapping/osm-junctions/junctions.html

The junction data comes from Routino[1] and as such not all highway
junctions are included (only highways that are routable).  The
rendering is performed client-side so is rather slow (probably my
Javascript isn't optimum).  The server will only allow downloading a
limited amount of data at a time so I recommend you zoom in to the
highest or penultimate zoom level.



Nice start.

I'd like to be able to zoom in more, particularly in central London.  
I've also found that clicking "Get Junctions" often gets an area,  
where only a little bit is visible at the highest zoom, and you have  
to pan and re-request to get for the current area. I'd also like a  
permalink, and a link to the osm site for easy editing.


Shaun

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Re: [Talk-GB] Question regarding mapping inaccuracies.

[Andrew M. Bishop]

Shaun McDonald  writes:

> On 29 May 2009, at 20:23, Peter Miller wrote:
>
>> On 29 May 2009, at 15:42, Shaun McDonald wrote:
>>
>>> I'm wondering if someone will be able to implement an efficient
>>> version of the snooker ball visualisation on 
>>> http://www.cyclestreets.net/blog/2009/03/26/thats-a-really-odd-route/
>>
>> That's very useful. Is it possible for anyone to view that mapping
>> view through Cycle Streets?
>
> No due to reasons of poor performance, hence why I'm asking is someone  
> else would be interested in implementing something similar with far  
> better performance and global coverage. The original authors would be  
> really happy to see it implemented elsewhere, as it would bring great  
> benefits to the OSM data.

As a quick hack I have generated such a map for the UK.

http://www.gedanken.org.uk/mapping/osm-junctions/junctions.html

The junction data comes from Routino[1] and as such not all highway
junctions are included (only highways that are routable).  The
rendering is performed client-side so is rather slow (probably my
Javascript isn't optimum).  The server will only allow downloading a
limited amount of data at a time so I recommend you zoom in to the
highest or penultimate zoom level.


[1] http://www.gedanken.org.uk/mapping/router/router.html
http://www.gedanken.org.uk/software/routino/

-- 
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--
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  http://www.gedanken.demon.co.uk/

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Re: [Talk-GB] Question regarding mapping inaccuracies.

[Frederik Ramm]

Hi,

Ed Loach wrote:
> And check what it displays every now and then. Almost-junctions are the 
> ones that would indicate possible unjoined ways (I've just found 5 from 
> the above URL and fixed them - I've not checked the crowd of them on 
> Brightlingsea yet).

I believe the "keepright" service actually checks for "noexit=yes". So 
if you have an almost-join where you cannot put bollards or a connecting 
footway or something, tag the street as "noexit=yes" and it will not 
show up anymore.

Bye
Frederik


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Re: [Talk-GB] Question regarding mapping inaccuracies.

[Shaun McDonald]

On 29 May 2009, at 20:23, Peter Miller wrote:

>
> On 29 May 2009, at 15:42, Shaun McDonald wrote:
>
>> I'm wondering if someone will be able to implement an efficient
>> version of the snooker ball visualisation on 
>> http://www.cyclestreets.net/blog/2009/03/26/thats-a-really-odd-route/
>
> That's very useful. Is it possible for anyone to view that mapping
> view through Cycle Streets?
>

No due to reasons of poor performance, hence why I'm asking is someone  
else would be interested in implementing something similar with far  
better performance and global coverage. The original authors would be  
really happy to see it implemented elsewhere, as it would bring great  
benefits to the OSM data.

Shaun


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Re: [Talk-GB] Question regarding mapping inaccuracies.

[Peter Miller]

On 29 May 2009, at 15:42, Shaun McDonald wrote:

> I'm wondering if someone will be able to implement an efficient  
> version of the snooker ball visualisation on 
> http://www.cyclestreets.net/blog/2009/03/26/thats-a-really-odd-route/

That's very useful. Is it possible for anyone to view that mapping  
view through Cycle Streets?


Regards,



Peter



>
>
> Shaun
>
> On 29 May 2009, at 15:19, Chris Andrew wrote:
>
>> Hi, all.
>>
>> It occurred to me whilst editing recently, that due to user error,
>> some roads do not correctly link to each other.  I made this mistake
>> when I first started editing, because I had the resolution at the
>> wrong setting.  This made things quick and easy, but unless you are
>> using a small scale, you can't ensure that the way that you are
>> plotting actually joins an existing way.
>>
>> This leaves me thinking that this could be a bit of a problem for
>> route planning on satnav devices and other apps where the roads MUST
>> connect together.  My question is, can we (do we?) automate the
>> checking of roads to ensure they are connected to something, and if
>> not, is it possible to highlight them, rather like unnamed roads can
>> be shown in red?
>>
>> Sorry about my garbled message; I hope it makes sense.
>>
>> Cheers,
>>
>> Chris.
>>
>> -- 
>> Reasons why you may want to try GNU/Linux:
>>
>> http://www.getgnulinux.org/
>>
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Re: [Talk-GB] Question regarding mapping inaccuracies.

[Chris Andrew]

Nice app, Ed.  I'll get to work in my area and try to resolve some of
the issues.  This could be really useful if more people knew about it.
 Hopefully they do, now.

Cheers,

Chris.

2009/5/29 Ed Loach :
>> My question is, can we (do we?) automate the
>
>> checking of roads to ensure they are connected to something,
>
>> and if
>
>> not, is it possible to highlight them, rather like unnamed
>
>> roads can
>
>> be shown in red?
>
>
>
> I don’t think it can be automated as only the person mapping it will
> probably know whether the roads should join or just finish very close.
> However, there are various validation tools. I quite like this one:
>
>
>
> http://keepright.ipax.at/report_map.php?ch30=30&ch40=40&ch50=50&ch60=60&ch70=70&ch80=80&ch90=90&ch100=100&ch110=110&ch120=120&ch130=130&ch150=150&ch160=160&ch170=170&ch180=180&lat=51.882737264776765&lon=1.1194146128160305&zoom=11&requery=requery
>
>
>
> And check what it displays every now and then. Almost-junctions are the ones
> that would indicate possible unjoined ways (I've just found 5 from the above
> URL and fixed them - I've not checked the crowd of them on Brightlingsea
> yet).
>
>
>
> Ed
>
>



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Re: [Talk-GB] Question regarding mapping inaccuracies.

[Shaun McDonald]

I'm wondering if someone will be able to implement an efficient  
version of the snooker ball visualisation on http://www.cyclestreets.net/blog/2009/03/26/thats-a-really-odd-route/


Shaun

On 29 May 2009, at 15:19, Chris Andrew wrote:


Hi, all.

It occurred to me whilst editing recently, that due to user error,
some roads do not correctly link to each other.  I made this mistake
when I first started editing, because I had the resolution at the
wrong setting.  This made things quick and easy, but unless you are
using a small scale, you can't ensure that the way that you are
plotting actually joins an existing way.

This leaves me thinking that this could be a bit of a problem for
route planning on satnav devices and other apps where the roads MUST
connect together.  My question is, can we (do we?) automate the
checking of roads to ensure they are connected to something, and if
not, is it possible to highlight them, rather like unnamed roads can
be shown in red?

Sorry about my garbled message; I hope it makes sense.

Cheers,

Chris.

--
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Re: [Talk-GB] Question regarding mapping inaccuracies.

[Peter Childs]

2009/5/29 Steve Hill :
> On Fri, 29 May 2009, Chris Andrew wrote:
>
>> My question is, can we (do we?) automate the
>> checking of roads to ensure they are connected to something, and if
>> not, is it possible to highlight them, rather like unnamed roads can
>> be shown in red?
>
> Having roads which come very close to being connected whilst not actually
> connecting is often a legitimate thing to do - certainly around here there
> are quite a few roads where they almost join but have a footway, a patch
> of grass or some bollards between them.
>

If there is a Path that Path should be mapped, If there is a set of
bollards Map it. barrier=bollard

Peter.

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Re: [Talk-GB] Question regarding mapping inaccuracies.

[Ed Loach]

> My question is, can we (do we?) automate the

> checking of roads to ensure they are connected to something,

> and if

> not, is it possible to highlight them, rather like unnamed

> roads can

> be shown in red?

 

I don’t think it can be automated as only the person mapping it will
probably know whether the roads should join or just finish very
close. However, there are various validation tools. I quite like
this one:

 

http://keepright.ipax.at/report_map.php?ch30=30

&ch40=40&ch50=50&ch60=60&ch70=70&ch80=80&ch90=90&ch100=100&ch110=110
&ch120=120&ch130=130&ch150=150&ch160=160&ch170=170&ch180=180&lat=51.
882737264776765&lon=1.1194146128160305&zoom=11&requery=requery

 

And check what it displays every now and then. Almost-junctions are
the ones that would indicate possible unjoined ways (I've just found
5 from the above URL and fixed them - I've not checked the crowd of
them on Brightlingsea yet).

 

Ed

 

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Re: [Talk-GB] Question regarding mapping inaccuracies.

[Steve Hill]

On Fri, 29 May 2009, Chris Andrew wrote:

> My question is, can we (do we?) automate the
> checking of roads to ensure they are connected to something, and if
> not, is it possible to highlight them, rather like unnamed roads can
> be shown in red?

Having roads which come very close to being connected whilst not actually 
connecting is often a legitimate thing to do - certainly around here there 
are quite a few roads where they almost join but have a footway, a patch 
of grass or some bollards between them.

  - Steve
xmpp:st...@nexusuk.org   sip:st...@nexusuk.org   http://www.nexusuk.org/

  Servatis a periculum, servatis a maleficum - Whisper, Evanescence


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[Talk-GB] Question regarding mapping inaccuracies.

[Chris Andrew]

Hi, all.

It occurred to me whilst editing recently, that due to user error,
some roads do not correctly link to each other.  I made this mistake
when I first started editing, because I had the resolution at the
wrong setting.  This made things quick and easy, but unless you are
using a small scale, you can't ensure that the way that you are
plotting actually joins an existing way.

This leaves me thinking that this could be a bit of a problem for
route planning on satnav devices and other apps where the roads MUST
connect together.  My question is, can we (do we?) automate the
checking of roads to ensure they are connected to something, and if
not, is it possible to highlight them, rather like unnamed roads can
be shown in red?

Sorry about my garbled message; I hope it makes sense.

Cheers,

Chris.

-- 
Reasons why you may want to try GNU/Linux:

http://www.getgnulinux.org/

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