[Talk-GB] Village buildings and roads misaligned

[Pablo Rodríguez]

Thanks both!

Setting an offset of 5.8, 1.6 looks good for most of the village.

I agree with you Steven, I think the idea is to make it as good as it can
be but it will never be perfect, starting with rough mapping and adding
detail with time. But, the detail takes time and that depends on the
community, so it is better to have a few villages roughly mapped than a
"perfect" neighbourhood :)

About the editions, I will probably start moving things around but, since I
don't have much time, it will take me a while. The good thing is that I
will be adding missing buildings/tags/features in the process.

Again, thank you for the recommendations!

Cheers,
Pablo

On Sun, 12 Dec 2021 at 15:00, Steven Hirschorn <steven.hirschorn at gmail.com>
wrote:

> I had a very similar issue, where I'd added thousands of houses before
> discovering the cadastral layer.
>
> First I'd say that if you go looking for imperfections in any OSM (or for
> that matter, Google) data you're on a downward spiral - eg. I mostly mapped
> the terraced houses I did as rectangles because I feel that the value of
> having
> 1) the number of buildings,
> 2) addresses in Nominatim,
> 3) an impression of the amount of development
> was more important than having every bay window and side return mapped.
> Others might be horrified by that, but may not be recording the numbers of
> storeys in the buildings they map. Or the roof colours.
>
> If all your buildings are recorded with an error of the same offset, I
> personally wouldn't worry too much. If you wanted to fix it, I've used JOSM
> and set a filter first to select buildings only and then selected and
> shifted whole terraces and sometimes streets worth of houses at a time.
> It's also worth checking that any POI nodes that should be related to the
> buildings are moved too. Then there's the issue of whether roads are
> aligned properly. I've been meaning to ask for a while about realigning
> roads, I've sometimes realigned minor roads, but am more reluctant to touch
> major roads.
>
>
>
>
> On Sat, 11 Dec 2021, 12:18 Pablo Rodríguez, <pablorodriguez.bb at gmail.com>
> wrote:
>
>> Hi everyone,
>>
>> After reading Steven's issue, where he saw misalignment in Isleworth, I
>> started to wonder if the editions I did/am doing/will do are correctly
>> aligned.
>>
>> First of all, I'm quite new to talk-gb but not to osm, although I've just
>> made small contributions along the years. Last year, I moved to Bar Hill,
>> CB, and saw that the village doesn't have addresses, so I started with
>> that. In the process, I made some modifications to buildings, always
>> aligning to pre-existing buildings against Bing. As editors, I use ID and
>> StreetComplete for all the changes.
>>
>> Last friday, I read https://osmuk.org/cadastral-parcels/, which says "GB
>> Cadastral Parcels" layer  "is perfectly aligned* and can be used to realign
>> the aerial imagery before mapping" and I could see that buildings and roads
>> in the village are misaligned.
>>
>> So, I have two questions:
>> - Can anyone review this?
>>     - https://www.openstreetmap.org/#map=15/52.2525/0.0173
>> - In case the misalignment is real, how should the procedure be? take the
>> time and go one by one?
>>
>> Thanks and regards,
>> Pablo
>>
>> _______________________________________________
>> Talk-GB mailing list
>> Talk-GB at openstreetmap.org
>> https://lists.openstreetmap.org/listinfo/talk-gb
>>
>
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