[Imports] Proposal for importing building footprints for Onondaga County, NY

Sat Feb 6 22:09:02 UTC 2021

A lifecycle prefix like defined here?:
https://wiki.openstreetmap.org/wiki/Lifecycle_prefix

I just used the following overpass query to check:

(
way[~"(proposed|planned|construction|disused|abandoned|demolished|remov
e
d|razed|was):"~".*"]({{bbox}});
node[~"(proposed|planned|construction|disused|abandoned|demolished|remo
v
ed|razed|was):"~".*"]({{bbox}});
relation[~"(proposed|planned|construction|disused|abandoned|demolished|
r
emoved|razed|was):"~".*"]({{bbox}});
)
;out body;>;out skel qt;

No lifecycle prefixes were found within this sample area, except one
way for a historical canal that was once in the area. What would be the
point of checking for lifecycle prefixes?

I'm glad to see that this data is shaping up to be useful! My
understanding from the import guidelines wiki page is that I need local
buy-in for the import. How should I proceed if few others approve or
raise issues?

Thanks,
Jack

On Sat, 2021-02-06 at 22:35 +0100, Mateusz Konieczny wrote:
> Thanks for doing the review!
> 
> I think that including sheds is ok
> if dataset is trustworthy.
> 
> Based on this description quality
> seems sufficient, at least I would support
> such import in my area.
> 
> Have you checked whether there are
> mapped buildings with lifecycle prefixes
> in your area?
> 
> 
> 
> 5 Feb 2021, 00:20 by imports at openstreetmap.org:
> > I've updated the wiki page to reflect those changeset tags, thank
> > you
> > for pointing that out. 
> > 
> > Just finished reviewing the data quality of this sample. There are
> > about 1200 building footprints present. Buildings I'm familiar with
> > represent the ground situation, and there are no glaring
> > inconsistencies. Checking against satellite imagery (Bing as of
> > 2021),
> > all footprints are over buildings and in good alignment (not
> > rotated).
> > Larger buildings have about a 1-2 foot offset, as well as most
> > smaller
> > houses. There are portions where houses have between 3-5 foot
> > offset,
> > appearing under tree cover. Against Google and ESRI Imagery World
> > satellite all buildings are offset ~15 feet southeast.
> > 
> > I also found 12 buildings which will need to be manually updated
> > for
> > what appear to be additions. No footprints appear to have more than
> > 10
> > vertices in their polygons, except those with rounded corners. The
> > JOSM
> > validator found no errors. Can't confirm that all "sheds" in the
> > backyards of homes exist. Perhaps they should be considered
> > temporary
> > buildings and filtered out to prevent clutter. 
> > 
> > I have a script comparing the centroid coordinates for individual
> > buildings appearing in both OpenStreetMap and the prepared file for
> > the
> > whole county. When selecting buildings whose area was less than 5%
> > different, there was a 4 foot difference on average. I will refine
> > this
> > script and put it in the repository later.
> > 
> > Does this sample file meet the quality required for import in
> > OpenStreetMap? 
> > 
> > Jack
> > 
> > On Thu, 2021-02-04 at 18:44 +0100, Mateusz Konieczny via Imports
> > wrote:
> > > Yes, that seems fine to me.
> > > 
> > > And for initial edits made by bot process and still fully
> > > reviewed
> > > bot=yes is not so necessary.
> > > 
> > > The most important part is including documentation page so
> > > for example 5 years later someone will be able to easily confirm
> > > that it is a legitimate import - and find full detail.
> > > 
> > > BTW, have you reviewed data quality on same sample?
> > > Is it matching on the ground situation or at least aerials?
> > > 
> > > Looking at
> > > https://gitlab.com/jackarnold/onondaga-building-osm-import/-/blob/master/prepare.py#L56
> > > Is in area of import something like demolished:building=yes?
> > > Or maybe someone used other
> > > https://wiki.openstreetmap.org/wiki/Lifecycle_prefix ?
> > > https://wiki.openstreetmap.org/wiki/Tag:man_made%3Dstorage_tank
> > > appearing in dataset as a building?
> > > 
> > > Is dataset including fully underground features
> > > (location=undeground,
> > > maybe also layer tag needed)?
> > > 
> > > Feb 4, 2021, 18:11 by imports at openstreetmap.org:
> > > > I plan on starting by manually reviewing and uploading
> > > > changesets,
> > > > so I
> > > > didn't feel pointing out it was automated necessary. It was
> > > > poorly
> > > > phrased. Would this be appropriate for changeset tags?
> > > > 
> > > > comment=Onondaga County, NY building footprints import
> > > > https://wiki.openstreetmap.org/wiki/Import/Catalogue/Onondaga_County_NY_Building_Footprint_Import
> > > > bot=yes
> > > > source=http://www.fsihost.com/onondaga/
> > > > source:date=2020-10-01
> > > > 
> > > > On Thu, 2021-02-04 at 11:56 +0100, Mateusz Konieczny via
> > > > Imports
> > > > wrote:
> > > > > "Changeset tags won't be necessary until the import is
> > > > > automated
> > > > > and
> > > > > not manually reviewed."
> > > > > 
> > > > > https://wiki.openstreetmap.org/wiki/Import/Catalogue/Onondaga_County_NY_Building_Footprint_Import
> > > > > 
> > > > > What you mean by that?
> > > > > Changeset tags should at least link wiki documentation page
> > > > > and
> > > > > mark it as a bot edit (though wiki documentation page may be
> > > > > also
> > > > > linked in
> > > > > the changeset comment).
> > > > > 
> > > > > Feb 4, 2021, 01:55 by imports at openstreetmap.org:
> > > > > > Hello,
> > > > > > 
> > > > > > I previously discussed importing building footprints for
> > > > > > Onondaga
> > > > > > County, NY from data provided by the Syracuse-Onondaga
> > > > > > County
> > > > > > Planning
> > > > > > Agency. The data source was prepared for the county by
> > > > > > “Pictometry
> > > > > > International using digital orthogonal
> > > > > > aerial photography flown by Pictometry”. The data have been
> > > > > > updated
> > > > > > as
> > > > > > recently as October 2020 and not since, after checking with
> > > > > > SOCPA.
> > > > > > It
> > > > > > is accurate to between 2 and 5 feet when compared against
> > > > > > Bing
> > > > > > Imagery
> > > > > > or ESRI World Imagery. SOCPA has given OpenStreetMap a
> > > > > > waiver
> > > > > > to
> > > > > > use
> > > > > > this data, which has been verified by the legal team on
> > > > > > their
> > > > > > mailing
> > > > > > list.
> > > > > > 
> > > > > > Recently I’ve been working on formalizing the conversion
> > > > > > script
> > > > > > and
> > > > > > wiki page, which is available here:
> > > > > > 
> > > > > > https://wiki.openstreetmap.org/wiki/Import/Catalogue/Onondaga_County_NY_Building_Footprint_Import
> > > > > > 
> > > > > > To allow the community to review the import at this state,
> > > > > > I
> > > > > > have
> > > > > > created a shapefile from converted data for the Village of
> > > > > > Liverpool,
> > > > > > NY:
> > > > > > 
> > > > > > https://gitlab.com/jackarnold/onondaga-building-osm-import-example/-/raw/master/20210203/28_Village%20of%20Liverpool.geojson
> > > > > > 
> > > > > > I hope that there will be no issues with the data, and
> > > > > > minimal
> > > > > > tweaking
> > > > > > to be required to move forward with the import. From here I
> > > > > > will
> > > > > > manually verify the data against satellite imagery, then
> > > > > > upload
> > > > > > the
> > > > > > OSM
> > > > > > file to the test server, and verify it once again. With
> > > > > > approval
> > > > > > from
> > > > > > the community, I will continue to import one
> > > > > > municipality/town/or
> > > > > > smaller boundary at a time on the main server, and update
> > > > > > the
> > > > > > wiki
> > > > > > page
> > > > > > with my progress.
> > > > > > 
> > > > > > I would appreciate and comments, suggestions, or concerns!
> > > > > > 
> > > > > > Thanks,
> > > > > > Jack
> > > > > > 
> > > > > > 
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