Re: [OSM-talk] Power Lines and topological error detection

[Pierre Béland]

Using Roland Overpass query, we can search easily in JOSM witha query for 
simultaenous childs of  1. way with power:line tag and 2. way with no 
power:line tag
child(type:way & power:line) & child(type:way & -power:line)
Then with the Todo plugin, we can revise each individual point and unclip from 
the electric network.

 
Pierre 
 

François Lacombe wrote:
Hi all,Osmose-QA also display such bad connection between power lines and non
power features
http://osmose.openstreetmap.fr/fr/error/16446522057 (item 7040 class 4)

We also have this issue related to unterminated lines like this occurence
(7040 class 2) :
http://osmose.openstreetmap.fr/fr/error/16430655499
https://github.com/osm-fr/osmose-backend/issues/229

It causes a lot of false positive alerts because occuring on T connections
(not only for power lines)
No offense intended towards devs who do a lot of good work anyway :)

All the best

François
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Re: [OSM-talk] Power Lines and topological error detection

[François Lacombe]

Hi all,

Osmose-QA also display such bad connection between power lines and non
power features
http://osmose.openstreetmap.fr/fr/error/16446522057 (item 7040 class 4)

We also have this issue related to unterminated lines like this occurence
(7040 class 2) :
http://osmose.openstreetmap.fr/fr/error/16430655499
https://github.com/osm-fr/osmose-backend/issues/229

It causes a lot of false positive alerts because occuring on T connections
(not only for power lines)
No offense intended towards devs who do a lot of good work anyway :)

All the best

François

2018-03-07 5:30 GMT+01:00 Roland Olbricht :

> Hi,
>
> > Various topological errors related to power lines are not detected by
> > OSM editors. Monitoring the High Voltage power network for Quebec I
> > often find nodes connecting crossing waterbody, highways, landuse to the
> > power lines.
>
> FWIW, you can find them with a query like
> https://overpass-turbo.eu/s/wLQ
>
> If you want to only get highways, there is still enough to do:
> https://overpass-turbo.eu/s/wLR
>
> For practical work in JOSM, you can get power lines and the connected
> objects: paste
>
> way[power=line]({{bbox}});
> node(w);
> way(bn);
> (._;>;);
> out meta;
>
> and choose a meaningful bounding box. Please do not do other things than
> disconnecting, because you cannot see to what the other objects are
> connected. But for disconnecting, this should be fine.
>
> Cheers,
> Roland
>
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Re: [OSM-talk] Power Lines and topological error detection

[Pierre Béland]

thanks Roland, this extract provides a lot of objects (highway, water, natural, 
landuse, etc.) that were clipped to power lines. We could even add low voltage 
power lines that are clipped to high voltage power lines.

I will play with JOSM Search to isolate the nodes that need to be unclipped.
 
Pierre 
 

Le mardi 6 mars 2018 23:30:50 HNE, Roland Olbricht  
a écrit :  
 
 Hi,

 > Various topological errors related to power lines are not detected by
 > OSM editors. Monitoring the High Voltage power network for Quebec I
 > often find nodes connecting crossing waterbody, highways, landuse to the
 > power lines.

FWIW, you can find them with a query like
https://overpass-turbo.eu/s/wLQ

If you want to only get highways, there is still enough to do:
https://overpass-turbo.eu/s/wLR

For practical work in JOSM, you can get power lines and the connected 
objects: paste

way[power=line]({{bbox}});
node(w);
way(bn);
(._;>;);
out meta;

and choose a meaningful bounding box. Please do not do other things than 
disconnecting, because you cannot see to what the other objects are 
connected. But for disconnecting, this should be fine.

Cheers,
Roland
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Re: [OSM-talk] Power Lines and topological error detection

[Roland Olbricht]

Hi,

> Various topological errors related to power lines are not detected by
> OSM editors. Monitoring the High Voltage power network for Quebec I
> often find nodes connecting crossing waterbody, highways, landuse to the
> power lines.

FWIW, you can find them with a query like
https://overpass-turbo.eu/s/wLQ

If you want to only get highways, there is still enough to do:
https://overpass-turbo.eu/s/wLR

For practical work in JOSM, you can get power lines and the connected 
objects: paste


way[power=line]({{bbox}});
node(w);
way(bn);
(._;>;);
out meta;

and choose a meaningful bounding box. Please do not do other things than 
disconnecting, because you cannot see to what the other objects are 
connected. But for disconnecting, this should be fine.


Cheers,
Roland

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[OSM-talk] Power Lines and topological error detection

[Pierre Béland]

Various topological errors related to power lines are not detected by OSM 
editors. Monitoring the High Voltage power network for Quebec I often find 
nodes connecting crossing waterbody, highways, landuse to the power lines. JOSM 
validation do not detect these.  I often, it seems that remote mappers forget 
to look sideways in their virtual world.  Also, it is probably possible to 
write an Overpass query to find nodes that intersect this various «incompatible 
worlds».

This made me write this humoristic note. Who knows, this may help OSM 
contributors to remember to look sideways.
Risks of editing nearby high voltage power lines (humour note) 
https://www.openstreetmap.org/user/PierZen/diary/43443 





 
Pierre 
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