[OSM-talk-be] WMS (aerial) imagery covering Belgium, now conveniently packaged for adding it to JOSM

[André Pirard]

On 2014-12-28 21:50, Sander Deryckere wrote :
> Jo, I'm not sure that the GRB layer should be part of the default
> layer set. It becomes too dangerous people will use it without reading
> about the limitations.
>
> But anyway, thanks for working on it.
>
> Otoh, supporting iD is also important. We can't say "Don't trace from
> Bing" if people can't use Agiv in iD. For that, we would need a TMS.
> So that either means setting up a map proxy to convert WMS from Agiv
> to TMS, or finding some TMS layer available (there are TMS layers for
> older imagery from Agiv, but I've found none for the most recent
> imagery). Then, it needs to be added to this repo:
> https://github.com/osmlab/editor-imagery-index
> But I'm not experienced enough with imagery to accomplish this.
>
> Jo, are you, or is there anyone else wanting to look at this? I think
> it would save us a lot of problems.

The Mapproxy I built and published
<http://www.papou.byethost9.com/maps/mapproxy/> for you all contains a
configuration example to convert OSM TMS to WMS and serve it.  Mapproxy
can equally well convert TMS from WMS.  I made it in particular to help
an Agiv conversion but I never heard about that Agiv issue any more.

I have asked twice if an Ubuntu or Debian host connected to IP would be
available to run support programs. There wasn't any sort of reply so I
completely abandoned the idea.

The best idea would be to use JOSM if the SPW were spending a few hours
to serve WMS 4326.
Failing that or/and if JOSM seems too difficult to use, Merkaartor is a
possible alternative that some people like on a PC.  Last time I tried
it, I saw a prohibitive map distortion on the screen when using Lambert
projection and I prefer correctness and features to a nice look.

Cheers

André.


>
> Regards,
> Sander
>
> 2014-12-28 21:39 GMT+01:00 André Pirard <A.Pirard.Papou at gmail.com
> <mailto:A.Pirard.Papou at gmail.com>>:
>
>     On 2014-12-28 18:30, Jo wrote :
>>     This is long overdue, but I finally got round to it. I added a page
>>
>>     https://josm.openstreetmap.de/wiki/Maps/Belgium
>>
>>     with WMS sources for Belgium, for which we have permission to use.
>>
>>     So now there are 3 more entries on this page:
>>
>>     https://josm.openstreetmap.de/wiki/Maps
>>
>>     The resolutions are all better than Bing. They are also more recent.
>>
>>     Is there somebody who knows a convenient way to add those
>>     coordinates, so a shape is shown?
>>
>>     AGIV also has coverage for Brussels, The Walloon imagery also
>>     covers the German speaking part of Belgium.
>     Well done, Jo.  The only thing to do is now:
>     JOSM>Imagery>Imagery Preferences[]>Available...>select BE...>Activate
>>     I don't know much about projections, but EPSG:4326 seems to work
>>     just fine for all three.
>     Projections are simple: a mathematical transformation of the Earth
>     surface to draw it on a plane (screen).
>     EPSG:4326 uses the GPS coordinates (degrees) linearly (d ° NS/EW =
>     c cm  vertically/horizontally).
>     Cylindrical is the projection as if by light beams perpendicular
>     to the Earth axis.
>     Mercator is the same but with a vertical correction so that the
>     polar regions are not flattened.
>     These 3 are quickly transformed one to another with little CPU.
>     Hence, JOSM, which normally uses Mercator on screen, can convert
>     any to its screen projection.
>
>     The (Belgian) cartographers use Lambert projections which is
>     similar to cylindrical, but on a cone that is tangent to a line
>     going across their country (Belgium).  This is so that the
>     proportions of the distances are the same vertically and
>     horizontally. The Belgian servers serve them too.  In addition to
>     EPSG:4326.  Except SPW (;-) ).
>>     Feel free to improve/extend that wiki page, if you can.
>     I would add Wallonia 2009.  It is sometimes useful (e.g. to get
>     rid of trees).
>     Is it just a matter of editing the file?  Have to refresh the server?
>     Can id=SPW be the same or what should be used?
>
>     What is that (3.xxxxxx) after the name JOSM displays? Any way to
>     get rid of it?
>
>     Cheers
>
>     André.
>
>

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