[Talk-us] Updates:LA County building import (Los Angeles, California, USA)

maning sambale emmanuel.sambale at gmail.com
Tue Jul 19 14:00:17 UTC 2016


Hi everyone,

Another round of updates on LABuildings import.
Last week we've imported ~1.1M buildings in LA City. Over 100
usernames participated.
We are close to finishing Phase 1 (LA City) and will continue data QA
and cleanup if needed.

We've posted OSM diaries on the process:
- On tools we built: https://www.openstreetmap.org/user/manings/diary/38969
- On the data: https://www.openstreetmap.org/user/manings/diary/39081

As always comments, from the community is appreciated.
- Github - https://github.com/osmlab/labuildings/issues/
- Chat - https://gitter.im/osmlab/labuildings
- Wiki - https://wiki.openstreetmap.org/wiki/Los_angeles,_California/Buildings_Import



On Thu, May 5, 2016 at 8:07 PM, maning sambale
<emmanuel.sambale at gmail.com> wrote:
> Hi,
>
> Over the past month, since we started the LA building import [0],
> ~330K buildings were added by 74 different users [1]. We ran several
> mapathon events [2] in LA to kickstart the import with local mappers.
>
> As this has been going on we've been validating the work, and fixing
> any data quality issues we've encountered. If you have specific concerns,
> please post in the repo [3].
>
> The OSM Operations group has asked that we pause on all large mapping
> import activities for the next two weeks as they prepare for the
> upcoming
> server move. Since we are adding thousands of nodes for each changeset,
> this is slowing down the backup process.
>
> We will update the list once we get the green light again. [4]
>
> [0] https://wiki.openstreetmap.org/wiki/Los_angeles,_California/Buildings_Import
> [1] https://taginfo.openstreetmap.org/keys/lacounty:ain#overview
> [2] http://www.meetup.com/MaptimeLA/
> [3] https://github.com/osmlab/labuildings/issues
> [4] https://github.com/osmlab/labuildings/issues/88
>
> On Mon, Apr 11, 2016 at 8:48 PM, maning sambale
> <emmanuel.sambale at gmail.com> wrote:
>> Hi,
>>
>> We've started the import this during MaptimeLA [0] last April 2.
>> First project focused on Southside LA [1].
>> For any issues regarding the process and the data please post a ticket
>> in GH [2].
>>
>> [0] http://www.meetup.com/MaptimeLA/events/229861154/
>> [1] http://labuildingsimport.com/project/2
>> [2] https://github.com/osmlab/labuildings/issues
>>
>>
>> On Sun, Mar 27, 2016 at 12:20 AM, Christoph Hormann
>> <chris_hormann at gmx.de> wrote:
>>> On Thursday 24 March 2016, maning sambale wrote:
>>>>
>>>> > - Tagging still looks vague.  What you have on
>>>> > https://github.com/osmlab/labuildings/blob/master/README.md is just
>>>> > a list of OSM keys to use but there is no information on the values
>>>> > -
>>>>
>>>> Right, I updated the wiki to describe the tags.  Still a work in
>>>> progress, but see here:
>>>> https://wiki.openstreetmap.org/wiki/Los_angeles,_California/Buildings
>>>>_Import#Data_Preparation
>>>
>>> Thanks, this clarifies things a lot and mostly looks good.
>>>
>>> Regarding tagging plans please consider that building=farm is
>>> exclusively for residential building on a farm, not for other buildings
>>> with farming related use.
>>>
>>>> The initial offset we saw was due to re-projection issues from NAD83
>>>> to WGS84 datum.  By using a custom projection parameters the
>>>> difference is very minimal difference (10 micrometer precision
>>>> range). Reprojection is now step is now added in the wiki.
>>>
>>> OK. I was also concerned about vertical datum (i.e. reference geoid) for
>>> elevation values and feet vs. meters for ele and height.
>>>
>>> --
>>> Christoph Hormann
>>> http://www.imagico.de/
>>
>>
>>
>> --
>> cheers,
>> maning
>> ------------------------------------------------------
>> "Freedom is still the most radical idea of all" -N.Branden
>> https://epsg4253.wordpress.com/
>> http://twitter.com/maningsambale
>> ------------------------------------------------------
>
>
>
> --
> cheers,
> maning
> ------------------------------------------------------
> "Freedom is still the most radical idea of all" -N.Branden
> https://epsg4253.wordpress.com/
> http://twitter.com/maningsambale
> ------------------------------------------------------



-- 
cheers,
maning
------------------------------------------------------
"Freedom is still the most radical idea of all" -N.Branden
https://epsg4253.wordpress.com/
http://twitter.com/maningsambale
------------------------------------------------------



More information about the Talk-us mailing list