[OSM-talk-be] BE Quarterly Project (Schools) - Go !

Glenn Plas glenn at byte-consult.be
Thu Jan 21 11:05:55 UTC 2016


On 21-01-16 10:37, Marc Gemis wrote:
> Glenn,
> thanks a lot for the hard work and the explanation. It looks very promising !
> If you want a beta tester on OSX, feel free to contact me

It's been great to look at GRB data and compair. Sounds great to test it
on OSX, I'll publish the tool soon.
> 
> Any idea how the "roofs" attached to a building look like after
> importing ? On the GRB images you see them as areas filled with
> diagonal lines.

Not always, those diagonal lines can also be a building with an entrance
underneath.  This comes from the Gba shapes, roof's will actually share
nodes (in the raw data) with buildings from Gbg shapes.

But using the simplify way plugin, chances are the nodes don't all
matchup.  You will however get a warning in JOSM validator.  Then it's a
simply checking out the building and perhaps join and/or merge the
nodes, usually trivial work.

I've imported the roofs in half hour, but there is a lot in the Gba
shapes that we can't directly import, some strange structures but also,
the 'verdieping' , aka raised buildings needs human attention.  Usually
you need to do some mods or compromise.

Check here, no real visual difference in standard osm style.  But the
meta data is there.

http://overpass-turbo.eu/s/dSY

Only about 23% of Gba data is directly usable, notably 'roof'

My tool support Gba/Gbg/Knw shapes at the moment.

Glenn


> Just curious whether they are part of the building or are separate "buildings".
> 
> m
> 
> On Thu, Jan 21, 2016 at 10:43 AM, Glenn Plas <glenn at byte-consult.be> wrote:
>>>> Then you can use Shift to select 2 buildings, move finger to 't' and
>>>> poof, done.
>>
>> http://aptum.bitless.be/movies/stek12.avi
>>
>> You don't even need to select those 2 buildings in most cases:
>>
>> - run the validator
>> - navigate to and select warnings like 'crossing buildings', 'building
>> inside building'.
>> - Now the offenders are both already selected. You can merge after
>> visually confirming that it's 'the same building'.  Sometimes it's not
>> selecting the correct ones, but adjacent buildings.
>> - press replace geometry hotkey
>> - fix any merge warnings.
>>
>> common ones are : building=yes on original vs. building=shed on GRB import.
>>
>> Any existing tag conflict will throw another dialogue up, so it helps to
>> rename in advance, for example, on size, anything smaller than 10m2 is a
>> shed (=this kind of equals how GRB works).  So when both versions have
>> building=shed, you will not get the dialogue and are able to select the
>> next validator issue.
>>
>> The validator is a real tool here, not just something to use at the end,
>> it's a speed booster too.
>>
>> Glenn
>>
>>
>>
>>
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