[Talk-GB] HS2 route is open data!

Tue Jan 24 18:20:58 GMT 2012

Please note that it looks like I've managed to upload the data twice (at
least some of it anyway). I'll revert and sort.

Cheers

Andy

From: Andy Robinson [mailto:ajrlists at gmail.com] 
Sent: 24 January 2012 17:19
To: 'Talk-GB at openstreetmap.org'
Subject: RE: [Talk-GB] HS2 route is open data!

Proposed HS2 route has been added to OSM under changesets 10485788 [1] &
10486240[2]. I've also added all the ways to a relation 1986944  [3]

All data added is separate for any other data in OSM. Ie its not connected
to any other existing ways.

Note that the data provided by DfT appears to be the centreline for the main
runs but at junctions separates out to individual tracks. There is a little
overlap in these locations and I have not attempted to join the former with
the latter. I've also not simplified any ways (additional nodes are only on
curves anyway).

Tag mapping should be logical. Where both east and west sides have the same
construction form (eg cutting) then I have added the appropriate tag. Where
the sides differ I have not but the different side designations have been
kept throughout (though tag values have been changed to fit better with our
way of tagging things).

For those interested in the process I took the shp file and used ogr2osm to
convert it to an osm file with the script referring to a translation file to
map the shp file attributes to osm tags. There was some node duplication and
other minor unconnected way issues with the data which I cleaned up manually
in JOSM before uploading.

Cheers

Andy

[1] http://www.openstreetmap.org/browse/changeset/10485788

[2] http://www.openstreetmap.org/browse/changeset/10486240

[3] http://www.openstreetmap.org/browse/relation/1986944 

From: Andy Robinson [mailto:ajrlists at gmail.com] 
Sent: 23 January 2012 22:39
To: 'Peter Miller'; 'David Earl'
Cc: 'Talk-GB at openstreetmap.org'
Subject: RE: [Talk-GB] HS2 route is open data!

I'm separating out the various sections (cutting, tunnel etc) to separate
shape files and converting to lat/lon. I'll have a play with it in JOSM once
done. I'm splitting with whatever the west side attribute is (the east side
may be different where the natural ground slopes etc).

I'll put all the various files on dev once I'm done.

Cheers

Andy

From: Peter Miller [mailto:peter.miller at itoworld.com] 
Sent: 23 January 2012 20:59
To: David Earl
Cc: Talk-GB at openstreetmap.org
Subject: Re: [Talk-GB] HS2 route is open data!

On 23 January 2012 20:27, David Earl <david at frankieandshadow.com> wrote:

On 23/01/2012 20:21, Jason Cunningham wrote:

Good to see the data being released,
But.... I don't believe this "proposed" route should yet be added to OSM.
You'll regularly here the phrase "map what's on the ground", but we
all(?) accept upcoming changes to "what's on the ground" can be mapped,
and these upcoming changes to the land are mapped using the proposed tag
(then construction tag).

By that reasoning we wouldn't map boundaries, as these don't appear "on the
ground", they are entirely abstract concepts.

The point here is that this is *helpful geographical information*. If the
proposal goes away or changes, remove the data. Let's be pragmatic here.

I agree that one should not add every aspirational route, however this is
much more than an aspiration and there is considerable support for it from
official sources. I believe we should indeed add transport proposals where
they have committed funding and official firm support. We should of course
tag is as 'proposed'. If the project goes ahead we change it to
'consturction', if it goes cold then we delete it. Fyi, I did just that on
the Tintewhistle bypass to the east of Manchester. I added it when it was
funded and and in the HA plans and then removed it when the public inquiry
collapsed a while later.

It is of course up to map rendering script to determine if it is appropriate
render 'proposed' transport schemes and this will depend on the use to which
it is to be put. Mapquest probably wouldn't show them (because mapquest are
primarily providing maps for the traveler. OSM Mapnik will probably show it
because it tries to map almost everything. Other mapping outlets can make
their own decision.

Good news re rendering HS2 for use in Potlatch. One suggestion...  I notice
that the shape file contains details of cuttings, embankments, bridges (and
viaducts) and tunnels. Could you present that using distinct colours or
textures or something? It is tagged separately for each side of the route,
ie eastside=cutting.

Regards,

Peter

We also seem to mark routes of old railways for which there is no evidence
on the ground. (Quite why, I don't know, and this raises the question again
of representing any historical data, but that was discussed at length
recently).

David

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