[Talk-us] [Imports] Addition of building footprints in selected U.S. and Canadian cities

Kate Chapman kate at maploser.com
Tue Apr 3 02:56:22 BST 2012


DC GIS

http://wiki.openstreetmap.org/wiki/Import/Catalogue

-Kate

On Mon, Apr 2, 2012 at 5:56 PM, the Old Topo Depot
<oldtopos at novacell.com> wrote:
> Kate,
>
> What was the source for the building footprint import ?
>
> On Mon, Apr 2, 2012 at 6:58 PM, Kate Chapman <kate at maploser.com> wrote:
>>
>> We did an imperfect import of building footprints in Washington D.C. a
>> while ago.  I personally find it makes the map far more usable for
>> adding other information. With the buildings in I am able to add
>> stores and other details easily without using a GPS, simply by
>> printing Walking Papers.
>>
>> Personally for me I enjoy outlining buildings, but there are plenty of
>> other places without footprints where I could do that if I had the
>> urge.
>>
>> -Kate
>>
>> On Mon, Apr 2, 2012 at 9:18 AM, Richard Weait <richard at weait.com> wrote:
>> > On Mon, Apr 2, 2012 at 11:46 AM, William Morris
>> > <wboykinm at geosprocket.com> wrote:
>> >> So here's something to mull over while we all wait for the license
>> >> upgrade:
>> >>
>> >> http://dl.dropbox.com/u/23616645/Geosprocket_Share/umd_subset.osm
>> >>
>> >> That's an extract of the UVM-SAL building footprints I'd like to
>> >> import for swathes of MD and PA. My workflow for killing existing
>> >> feature conflicts actually went best without involving ESRI at all:
>> >>
>> >> 1.) In QGIS, Set up 0.2-degree import grid over new building coverage
>> >> areas
>> >> 2.) Pull down one grid cell worth of OSM data using the QGIS OSM plugin
>> >> 3.) Add building footprint .shp, select all footprints that intersect
>> >> OSM lines or polygons
>> >> 4.) Switch selection, save as new .shp
>> >> 5.) Run ogr2osm.py on new .shp (Special thanks to Andrew Guertin for
>> >> running me through that process)
>> >> 6.) Open new .osm file in JOSM, add building tags, upload.
>> >> 7.) Repeat for next import grid cell
>> >>
>> >> Tedious, but it'll get the job done. And a reminder: I do not intend
>> >> to add any building footprint that conflicts with an existing feature,
>> >> adhering to the OSM preference for user-added features over imports.
>> >> Now soliciting thoughts, roadblocks, expressions of ennui, etc.
>> >> Thanks!
>> >>
>> >> -Bill Morris
>> >
>> > My objection is a generic one and one that has been heard before on
>> > this channel.  To be clear, I do not wish to criticise Bill; he
>> > appears to be following the bulk edit guidelines and he is engaging in
>> > the discussions here.  That's fantastic.  Bill, welcome to the
>> > community.
>> >
>> > I think imports (taking a large number of objects from an external
>> > source and placing them in OSM all at once) is bad for the community.
>> > Most of you have heard me say this before.  I still have no hard
>> > evidence to prove it.  There is also no hard counter-evidence.  At
>> > best, imported data will be unmaintained.  I glibly offer most TIGER
>> > ways as evidence.
>> >
>> > I ask you to suspend disbelief for a moment, and presume that imports
>> > are generally bad, and presume that adding new mappers is generally
>> > good.
>> >
>> > Can we try something new?  Can we use this building data as motivation
>> > to get new mappers in those areas so that specific mappers will have a
>> > stronger connection to the data in specific areas?
>> >
>> > Something like this:
>> > - Let's set a smaller grid. Something like a large suburban arterial
>> > block, say 1.5km / 1 mi square.
>> > - If you want to import the buildings in one grid square, you have to
>> > find a new mapper in that area, and they have to do an on the ground
>> > survey of some part of that area.
>> > - You can only do so in areas that are no more than four grid squares
>> > from your home location (or work location).
>> >
>> > This is a cross between "adding game-features to OSM", "banning
>> > imports" and "having users adopt part of the map".  :-)
>> >
>> > This could be really beneficial to a new mapper.  They could survey
>> > the local fire station, police station, hospital and schools, and
>> > perhaps the businesses on the main street, and a few local shopping
>> > malls.  They get all of those business names, and they'll be
>> > completely up to date.  They'll add them to the map, and they don't
>> > have to trace as many building outlines, because they have the
>> > external source available.
>> >
>> > What I hope this will encourage is:
>> > - new mappers in those areas
>> > - who will do new foot surveys of interesting things
>> > - and will feel attached to the data
>> > - and keep it up to date over time.
>> >
>> > And, if the new mapper understands that the building data for their
>> > area is a "reward", they are unlikely to be frustrated or discouraged
>> > by it if some buildings end up in the wrong place.  the new mapper
>> > will just fix them.  And carry on mapping.
>> >
>> > I know that what I suggest is much harder than simply importing the
>> > data from one or two accounts.  I suggest that the benefit of finding
>> > and encouraging new mappers in your area is much greater than just
>> > having new building outlines in your area.
>> >
>> > Now the Negative Army will jump in and say, "That's too hard.", "That
>> > will never work.", "I want buildings now."
>> >
>> > You can take leadership on this.  Are you the only active mapper in
>> > your city or region, or one of only a few?  Do this.  Be a leader.
>> > Grow the community and then you won't be able to keep up with the
>> > growth of the map.  Build new contributors.  (And host local OSM
>> > groups.)
>> >
>> > Thanks for letting me hijack your thread, Bill.  :-)
>> >
>> > Best regards,
>> > Richard.
>> >
>> > _______________________________________________
>> > Imports mailing list
>> > Imports at openstreetmap.org
>> > http://lists.openstreetmap.org/listinfo/imports
>>
>> _______________________________________________
>> Talk-us mailing list
>> Talk-us at openstreetmap.org
>> http://lists.openstreetmap.org/listinfo/talk-us
>
>
>
>
> --
> John Novak
> Novacell Technologies and the Old Topo Depot
> http://www.novacell.com
> 585-OLD-TOPOS (585-653-8676)
>



More information about the Talk-us mailing list