[Imports] Fwd: Burlington VT Building Footprints

[Eric Ladner]

Yes, you're probably seeing the difference between the slab (the data
uploaded) and the roofline (the thing you see in Bing).  Also, GIS
departments are notoriously behind the real world and there are a couple of
differences that could be explained by additions to the original house that
haven't filtered up to the GIS guys yet.  (199931651, for example).  Others
could be covered porches.  Typically the covered porch doesn't share the
same slab as the house.


On Tue, Jan 8, 2013 at 8:54 AM, the Old Topo Depot <oldtopos at novacell.com>wrote:

> A number of outlines differ significantly from the Bing aerial layer, ids
> (is this what foundation level accuracy means ?)
>
> 199931669
> 199931639
> 199931640
> 199931659
> 199931671
> 199931634
> 199931638
> 199931632
>
> will these be manually revised ?  If they are, is the City interested in
> incorporating such updates (refinements) into their data set ?  What can we
> do to enable such a "reverse" flow of data ?
>
> There's a statement earlier in the thread that the outlines are updated by
> the City.  As the OSM objects are not carrying any city assigned ids,
> what's the plan to propagate such updates into OSM as the city makes them
> available ?
>
> Building 199931626 is tagged as name="Miller Center" but a near-by school
> has no name tag.  Did the name originate with the city data ?  If so, why
> is the school not named ?
>
> There is a large structure on Heineberg Rd without an outline, is this
> just due to an arbitrary cut-off of the import or is it not in the City's
> data ?
>
> If I zoom in to the test import area using
> http://gis.ci.burlington.vt.us/gm/, I see what appear to be addresses.
>  Has the possibility of associating addresses with the buildings been
> discussed ?  The building outlines are are great addition, having them
> attributed with address info would be absolutely brilliant !
>
> Best,
>
>
> On Mon, Jan 7, 2013 at 9:56 PM, Werner Poppele <poppele at hm.edu> wrote:
>
>> William Morris wrote:
>>
>>> Thanks all,
>>>
>>> And many apologies; I think I sent an old copy of the file that had been
>>> previously-cached. I have run the JOSM validator on the complete
>>> building set and removed the multipolygon weirdness, including the
>>> overlaps Andrew noticed. I also orthogonalized the full set, though this
>>> required manual revision of some buildings.
>>>
>>> I did a test import of about 40 buildings at this location (my own
>>> neighborhood):
>>>
>>> http://www.openstreetmap.org/?**lat=44.51239&lon=-73.24811&**
>>> zoom=17&layers=M<http://www.openstreetmap.org/?lat=44.51239&lon=-73.24811&zoom=17&layers=M><
>>> http://www.openstreetmap.org/**?lat=44.51239&lon=-73.24811&**
>>> zoom=17&layers=M<http://www.openstreetmap.org/?lat=44.51239&lon=-73.24811&zoom=17&layers=M>
>>> >
>>>
>>>
>>> Let me know if there are any objections to me proceeding with the entire
>>> city. Thanks to everyone for your input!
>>>
>>> -Bill
>>>
>>>
>>> ----------
>>> William Morris
>>> Cartographer
>>> (802)-870-0880
>>> wboykinm at geosprocket.com <mailto:wboykinm at geosprocket.**com<wboykinm at geosprocket.com>
>>> >
>>>
>>> Twitter: @vtcraghead
>>>
>>> GeoSprocket LLC, Burlington VT
>>> www.geosprocket.com <http://www.geosprocket.com/>
>>>
>>>
>>>
>>>
>>> ______________________________**_________________
>>> Imports mailing list
>>> Imports at openstreetmap.org
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>>>
>> Good morning, Bill
>>
>> The test import looks pretty good, but I have some questions:
>>
>> There are buildings having more details than others: adjacent smaller
>> parts of buildings (garages ?, terraces, ...), the contours of other
>> buildings are simple rectangles, but on the bing image their contours are
>> more complex. Whats the reason for this ? Reconstruction of the buildings ?
>>
>> The positioning of the buildings look very good. The displacement of
>> buildings and highways compared to bing imagery seems to be ok.
>>
>> If you like, I can offer time to help for postprocessing the import.
>> Tell me, how I can contribute.
>>
>> WernerP
>> --
>> MUSICIANS do it rhythmically
>>
>>
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>>
>
>
>
> --
> John Novak
> 585-OLD-TOPOS (585-653-8676)
> http://www.linkedin.com/in/johnanovak/
> OSM ID:oldtopos
> OSM Heat Map: http://yosmhm.neis-one.org/?oldtopos
> OSM Edit Stats:http://hdyc.neis-one.org/?oldtopos
>
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>


-- 
Eric Ladner
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