[talk-au] mapping data on the NSW north coast, and a request for road designation clarification

[Eric Rose]

On Friday 01 February 2008 07:56:53 Brent Easton wrote:
> Hi Eric,
>
> Great work. I love that part of the world!
>
> Have a look at the tagging guidelines here:
>
> http://wiki.openstreetmap.org/index.php/Australian_Roads_Tagging
>
> Remember, these are just guidelines, but give a general plan to follow.

Yep. I based my tagging on that page.

>
> I would generally mark the major 'smaller country roads linking towns' as
> Secondary rather that Tertiary. Tertiary roads are through roads that
> aren't necessarily a direct route between two roads. They may be the
> flood-free back route, or the road out to popular lookout, or a scenic
> drive. I use secondary for all the main connecting routes between towns
> that are not major highways or state routes.

My guiding principal was that the roads which were signposted as "lismore 
44km" etc. were part of the tertiary network ie. the rosedale road, since it 
is the main back road, but roads like Binna Burra Road and Coorabell Road are 
really for local access.

>
> But there is room for discretion here since NSW does not have a very
> developed numbering system. For example, I would probably mark the
> Summerland way from Grafton to Casino as Primary.

I guess there's a case for that, but I'd reserve primary for marked highways 
like the Bruxner and Pacific, rather than Summerland Way and Orara Way. In 
the latter case, people travelling between Grafton and Coffs Harbour will 
take the Pacific Highway as their primary/preferred route unless they're 
sightseeing or have a more local interest, in which case Orara Way would be a 
secondary choice.

>
> By The Way, there is a problem with tracks you have uploaded around
> Mullumbimby - they have way too many points. It looks like you have loaded
> a GPS track into JOSM, converted it to a track and directly uploaded it.
> Please don't do this as it adds a huge burden to all of the editing and
> downstream processing tools. It makes editing with JOSM extremely
> difficult, and makes rendering of that area very slow.

Nope. I uploaded tracks via the OSM interface, and then hand-traced over them 
to create the data. Some of the GPS traces are dodgey since I was using an 
Garmin Edge 305 on the bicycle, and it drops out more frequently under trees. 
Eureka Road and Wilson's Creek Road in particular suffer here, but for the 
latter I also drove over it using my Nokia N800 and a bluetooth GPS receiver 
to get better traces.

Because a lot of that road (and others in the area) are quite twisty (my uncle 
calls it a goat track :) ), I took pains to try and capture that, so I use a 
resolution in JOSM of about 35 metres when placing data points. Further 
south, where the roads are longer and straighter, I was working with a 
resolution of about 100 metres to do the same.

>
> A good compromise is to use the 'Simplify track' button in JOSM which
> removes unneccessary nodes in sections of the track that have no bends, but
> leaves them alone on the curves. For example, on the Coolamon Scenic Drive
> it removed 2/3's of the nodes with affecting track definition.

I'll have to look more into that. Thanks.

>
> Regards,
> Brent.
>
> *********** REPLY SEPARATOR  ***********
>
> On 31/01/2008 at 11:24 PM Eric Rose  wrote:
> >Hi,
> >
> >I've been gradually creating data from the GPS traces I took over
> >Christmas
> >on the NSW North Coast, and have filled in some of the region around
> >Mullumbimby
> >(http://openstreetmap.org/?lat=-28.5989&lon=153.4827&zoom=13&layers=B0FT),
> >and from Lismore down to Grafton via Casino. If someone wanted to look
> >over
> >what I've done and suggest any improvements, or mis-tagging, I would
> >appreciate the feedback.
> >
> >Part of what I would like comment on, is the road types. From what I've
> >read,
> >highways such as the Pacific and Bruxner are tagged as primary, major
> >roads
> >are secondary (for instance Bangalow Road connecting Lismore and
> >Bangalow).
> >Below that, smaller country roads linking towns are tertiary and the rest
> >are
> >marked as unclassified, with no other designation accepted. Is that a
> >correct
> >understanding of the system?
> >
> >The question arises because, I see that some of what I would call
> >unclassified
> >have been marked as minor (cf. an example south of Eureka, on the above
> >map),
> >while some of what I would call tertiary (Lawrence Road north of Grafton)
> >has
> >been marked as secondary, and some that whould be unclassified as
> >tertiary,
> >in the same area.
> >
> >Eric
> >
> >--
> >There is a time when the operation of the machine becomes so odious --
> >makes
> >you so sick at heart that you cannot take part. You cannot even passively
> >take part. And you?ve got to put your bodies on the gears and upon the
> >wheels
> >and levers, upon all of the apparatus and you have to make it stop and you
> >have got to indicate to the people who run and own it, that unless you are
> >free, the machine will be prevented from working at all.
> >	Mario Savio
> >
> >_______________________________________________
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> >Talk-au at openstreetmap.org
> >http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk-au
> >
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> > 31/01/2008 9:09 AM
>
> ____________________________________________________________
> Brent Easton
> Analyst/Programmer
> University of Western Sydney
> Email: b.easton at uws.edu.au



-- 
There is a time when the operation of the machine becomes so odious -- makes 
you so sick at heart that you cannot take part. You cannot even passively 
take part. And you’ve got to put your bodies on the gears and upon the wheels 
and levers, upon all of the apparatus and you have to make it stop and you 
have got to indicate to the people who run and own it, that unless you are 
free, the machine will be prevented from working at all.
	Mario Savio
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