[HOT] Mapping task for seismic risk assessment

john whelan jwhelan0112 at gmail.com
Wed Oct 7 22:58:00 UTC 2015


So what we are saying then is the Bing imagery is fine but the many of the
existing buildings do not align to the Bing imagery for one reason or
another.  My concerns are new mappers will find this confusing and the
effort in moving each building individually by individual mappers is to put
it mildly a waste of resources.

If someone who knows what they are doing pulls down the entire area into
JOSM they could select each mappers buildings in turn and move them into
place on the Bing imagery.  Yes I could do it but I have a batch of some
twenty tiles to validate on a different project that I feel a greater
commitment to.  Besides that one of my financial institutions made a
mistake today which involved me going across town to sort it and and I'm
still grumpy as you may have noticed.  Could someone else take the
responsibility to line up the existing buildings please?

Thanks

Cheerio John

On 7 October 2015 at 18:48, Blake Girardot <bgirardot at gmail.com> wrote:

>
> In looking at the osm gps traces and strava gps data, the current bing
> imagery looks quite well aligned to me.
>
> cheers,
> blake
>
> On 10/8/2015 12:20 AM, john whelan wrote:
>
>> I think the issue is how can we make this easy for new mappers.  You can
>> select multiple buildings in JOSM by downloading the area then select
>> buildings, then select an author within the selection then move all the
>> buildings by that author at once.  It's not complicated just a pain to
>> do if some of the buildings have been corrected already.
>>
>> Sometimes in OSM its less work to blast everything that is there
>> checking the tags first to see its only buildings without additional
>> tags then remap than it is to clean up each building.  However that
>> approach is generally frowned on in OSM.
>>
>> May I suggest you freeze this project for the moment and get someone to
>> nudge the existing buildings into place then open it up again.
>>
>> I'm not trying to pour cold water on the project but trying to head off
>> a potential mess.
>>
>> Cheerio John
>>
>> On 7 October 2015 at 16:28, Joshua Campbell <jcampbell.geo at gmail.com
>> <mailto:jcampbell.geo at gmail.com>> wrote:
>>
>>     John,
>>
>>     In reviewing the existing building data, you are correct it is
>>     shifted. However, the data does not seem to be very accurate.
>>
>>     In this situation, I'm wondering it makes more sense to
>>     double-check, correct, and update that existing data, rather than
>>     try to bulk shift it (which I've never done). But I'm open to
>>     suggestions on the best way forward.
>>
>>      >From the imagery perspective, the Bing Imagery analyzer indicates
>>     the imagery is from May 2013. The DigitalGlobe archive shows a lot
>>     of collection in that area in May 2013, but one scene in particular
>>     (Catalog ID: 1030010022C8C400) is quite good. If this is the scene
>>     in Bing, then I'm inclined to think the imagery is spatially correct
>>     and serves as a good base to map from.
>>
>>     Regards,
>>     Josh
>>
>>
>>
>>     On Tue, Oct 6, 2015 at 12:48 PM, john whelan <jwhelan0112 at gmail.com
>>     <mailto:jwhelan0112 at gmail.com>> wrote:
>>
>>         Can some one double check the imagery, many buildings appear to
>>         be already mapped but are displaced from the imagery.  Perhaps
>>         some one could do a bulk move of the existing buildings?
>>
>>         http://tasks.hotosm.org/project/1235#task/187
>>
>>         Thanks John
>>
>>         On 6 October 2015 at 12:20, Joshua Campbell
>>         <jcampbell.geo at gmail.com <mailto:jcampbell.geo at gmail.com>> wrote:
>>
>>             All,
>>
>>             Just wanted to announce the creation of a new mapping task
>>             in the Kyrgyz Republic focused on seismic risk assessment
>>             (http://tasks.hotosm.org/project/1235). The project is
>>             funded by the Global Facility for Disaster Reduction and
>>             Recovery, managed by World Bank and implemented by ARUP (and
>>             partners) and includes seismic risk modeling to better
>>             understand and manage earthquake risks.
>>
>>             The unique element to this task is that the resulting OSM
>>             data will be directly integrated into a seismic risk model
>>             which will be used by the Kyrgyz Republic Government for
>>             decision making on risk reduction and preparedness.
>>             Additionally the OSM building data will be assessed on the
>>             ground and combined with a unique "streetview" type of
>>             imagery data. We hope that some of you can help out with the
>>             building mapping for this task, and help us test the
>>             methodological advancement of using OSM data for risk
>>             assessment.
>>
>>             Regards,
>>             Josh
>>
>>             ------------------
>>             Joshua S Campbell PhD
>>             Senior Disaster Risk Management Specialist
>>             Innovation Lab
>>             World Bank GFDRR
>>
>>
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