[OSM-talk-be] intersection looks very wrong -> use PICC with JOSM

[André Pirard]

On 2017-11-11 13:49, Jakka wrote:
>
>
> The middle intersection looks very wrong. Want to redesign it. There
> for need to know if the aerial image on "Wallononmap" are still
> corresponding with what is out there ? Or are there other images ?
> The same with intersection north and south of it I need to connect
> directly good on those also.
>     Check this in editor:
> 1)
> https://www.openstreetmap.org/#map=19/50.543085562147645/5.4872411965277195
>     Check a routeplanner
> 2)
> https://www.mapcat.com/directions/car#map=18.9/50.54324/5.48770&route=50.54312,5.48745;50.54332,5.48772
>     check aerial image I want to work with. No Mapillary image yet.
> 3)
> http://geoportail.wallonie.be/walonmap#SHARE=5DB543FAA0BC7C61E053D0AFA49DE388#CTX=DDB
The problems are:

  * That the roads are drawn too wide and one cannot see the turns they
    make to enter or leave the main road; "we should not tag for the
    renderer" they say but report the problem to them. But maybe
    changing the road types as soon as they start turning and not when
    they enter the side road would help.
  * That the mappers did not use JOSM+PICC (rarely needing the
    orthophotos because PICC is rarely wrong), they used Potlatch and
    ID; but in this case the photos are necessary; using BE SPW(allonie)
    2012-2013 aerial imagery is clearer that 2015 which is clearer that
    2016.

*PLEASE USE JOSM + PICC*: I have spent much time getting them working. I
have been repeatedly laughed at when I was requesting the SPW to correct
their projection bug and I kept hearing "we cannot copy yet" which is
not what we are doing.
If I had been heard, we would have been able to map Wallonia correctly
since 2010.
I am doing *a lot* of corrections (Jakka seems too), often moving houses
and other elements by 2, 3, ... 5m or more, adding numbers, using
Improve Way Accuracy mode to straighten roads, etc.
With JOSM a house is drawn, including increasing number, in a single
click. Correcting a badly mapped one takes much longer and one feels
like erasing it.

I doesn't look like this intersection changed over the years nor lately
(latest OSM topology around 2013).

Here is how you see that intersection with JOSM and PICC:

route du Condroz PICC
<http://www.papou.byethost9.com/maps/bad/route%20du%20Condroz%20PICC.png>
route du Condroz aérienne
<http://www.papou.byethost9.com/maps/bad/route%20du%20Condroz%20a%c3%a9rienne.png>

You can see that PICC is right.
The OSM two lower main lanes are offset north by more than 2m in the
middle and to the right.
The upper one makes a bump that it shouldn't do, it should go straight on.
The turns going diagonally make no sense. They should go straight and
then make a sharper turn.
Like the one coming from the left: it should be passing somewhere over
the stopped car.
They should certainly not connect (on a dot in common) with the other
ways they cross !!!
==> beware not to destroy relations when changing those dots erroneously
belonging to 2 ways:
JOSM will warn you but I'm not sure about the others: they destroyed my
relations.
The yellow, north-south roads are not precisely in the right place either.

Hoping this and the PICC can help,
Cheers
Cordialement,

André.





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