[osm-hu] Road Network Improvements in Hungary

Peter Gervai grinapo at gmail.com
2021. Már. 12., P, 09:32:50 UTC


Hello Murad,

Thanks for replying and taking time to answer the questions! Keep up
the good work! ;-)


Generally, our community believes that Hungary, especially larger
cities are well mapped and they are worried about changes which are
not especially wrong but unnecessary (micromapping), and in due course
create related errors (like changing road geometry while removing
pedestrian crossing, or breaking public traffic relations, fo
example).


On Fri, Mar 12, 2021 at 9:36 AM 'Murad Vardzelyan' via
openstreetmap-hungary <openstreetmap-hungary at googlegroups.com> wrote:

> The process includes detecting possible missing road candidates based on the GPS data we have → review the candidates using publicly available sources (such as OSC and Mapillary) → editing the map only if we're 100% sure the candidate is valid (same goes for one-way tags, road access and turn restrictions).

There are a few possible problem points:

- First: see "Bolt contribution" thread here as well as _multiple_
questions in this thread. Expect to spend a bit more time on us in the
beginning to prevent unresponded misunderstandings to escalate
quickly. See especially the one about not responding to changeset
comments. We try to use "Bolt" in the subject of Bolt related threads
so you should really check those. It would be good if you also point
us to a contact method where we can reach you in case of unresolved
problems.

- We have local orthophotos in multiple areas which are accurate to
the sub-meters level, and definitely should not be updated by 7-10
meters precise consumer GPS nor 5-25 meters "accurate" satellite
photography.

- Same goes to features using multiple manual measures or
high-accuracy sources (like RTK). (We try to tag them accordingly but
more often than not these are missing. :-( )

- You should be familar - to some extent - the highway tagging scheme
we use. Either translate the wiki page by a machine or request local
team to translate it for you. If you have questions related to that
feel free to ask, we hopefully can answer most of the questions. :-)
We may clean up after you a few times but if happens too often it may
cause friction.


> Since we operate in Hungary, we reach to the local Bolt team when there's a doubt, and they provide with ground data in such cases.

Is it correct that you operate only within Budapest and Debrecen? Are
you active only within the borders of these large (and usually very
well-mapped) cities?


> The GPS tracks are collected from smartphones, and we run internal algorithms to detect possible candidates, and then we do manual editing based on the mentioned GPS candidates, satellite imagery, street imagery combined and never use just one source.

Sounds good to me, but always keep in mind that visibly well mapped
areas are usually cared for by people living there and they may have
_extensive_ local knowledge, which may be more up to date than the
armchair-mapping data available to you.


> Please let me know if there are subjects that I missed to cover.

How do you use, or plan to use the OSM data? Knowing your usage helps
understanding what is important for you.


Have a nice day,
Peter




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