On 08/07/2015 15:17, Dan S wrote:
2015-07-08 15:08 GMT+01:00 Stephen Dawkins <[email protected]>:
I'll look into creating a page on the wiki with my import procedure. It
should be noted that part of the NaPTAN data has already been imported, just
not for the area that I'm working in.
NaPTAN is the official list of all bus stops (amongst other things) in the
UK, and is continuously updated. It's accuracy is pretty good overall (at
least in the stops I'm looking at importing).
I would say the quality is about equal to what we have in OSM already, with
the added benefit that it actually contains all the stops. OSM is missing so
many stops, I can't really import the bus routes without adding them all.
In my experience the geolocation is rather variable, as the previous
commenter suggested. When manually editing in the UK, quite a few
times I've been unsure whether a bus stop is missing or whether it's
actually meant to be represented by the naptan node some distance
away, so manual conflation can be tricky and I tend to avoid
conflating naptan entries that I suspect are duplicated with other
entries. Accuracy "about equal to" OSM, I'd say that's unlikely.
Best
Dan
I mean that there are some stops where the existing OSM stop is closer,
others where NaPTAN is. I've certainly heard that some of the areas in
NaPTAN have pretty bad data, but West/East Sussex seem to be OK (that's
not to say there are stops seemingly in the middle of nowhere). I intend
to keep the existing stops, and only add in stops that don't have any
counterpart in OSM.
Regards
Stephen
Regards
Stephen
On Wed, Jul 8, 2015 at 1:58 PM, Michael Reichert <[email protected]> wrote:
Hi Stephen,
Am 2015-07-07 um 15:05 schrieb Stephen Dawkins:
Does this seem like an acceptable way forward?
Have you read the import guidelines at OSM Wiki? If not, please do it!
You have to document your import proposal at OSM Wiki and post the link
to that page at this mailing list.
Once you run your import, please remember to use a separate account for
your import.
Another question: How good is Naptan data? In Germany quality of bus
stop databases is worse than OSM because these databases (each bus
company or network has its own) have been created by clicking on a
Navteq/TeleAtlas background map where the bus stop can be. Please
compare existing bus stops in OSM to those at Naptan.
I think we should only import this data if it is as good as bus stops at
OSM. If Naptan is worse, I would not add the Naptan stops to OSM and add
a fixme=* or stops_missing=true (I have not checke dif stops_missing=*
is already in use, it's just my idea) to the route relation. Other
mappers can use Naptan to find these bus stops and check in reality
where it really is. That's the way we do in Karlsruhe (city and
surrounding county) at the moment. We have a list of emergency access
points (accuracy 30 to 100 metres) by Red Cross and check in field if
they still exist and where they are really mounted.
Best regards
Michael
--
Per E-Mail kommuniziere ich bevorzugt GPG-verschlüsselt. (Mailinglisten
ausgenommen)
I prefer GPG encryption of emails. (does not apply on mailing lists)
_______________________________________________
Imports mailing list
[email protected]
https://lists.openstreetmap.org/listinfo/imports
_______________________________________________
Imports mailing list
[email protected]
https://lists.openstreetmap.org/listinfo/imports
_______________________________________________
Imports mailing list
[email protected]
https://lists.openstreetmap.org/listinfo/imports
