[HOT] Optimal NAS tech specifications to serve imagery tiles

Wed Mar 22 17:27:33 UTC 2017

Performance for imagery on either POSM or NAS would both be about the same
I think. POSM can do both dynamic tile generation and static tile caches.

POSM edits are still aggregated by a central import account when pushed to
osm.org. The individual editor is kept in the changeset but they don't
credit for the edit. We have been having conversations about ways to allow
contributors edits to stay with them throughout the process and getting rid
of the import account but this requires some changes/trusts with osm.org
that are not currently available. The ultimate solution is that POSM is a
trusted osm account generator, this involves many technical and political
hurdles.

Dale

On Wed, Mar 22, 2017 at 10:21 AM, Claire Halleux <claire.halleux at hotosm.org>
wrote:

> Thank you Dale for your useful updates, hadn't heard about OpenDroneMap
> module yet.
>
> Our current need is strictly focused on serving imagery tiles, so we are
> not considering the other POSM functionalities in this case.
> In that context, we are looking for the most performant solution, knowing
> that we can use static tile caches (on the NAS), instead of generating
> images dynamically (on the NUC). I'm guessing that a NAS would perform
> better but haven't been able to compare them practically yet.
>
> Regarding POSM, is it now possible to attribute changesets to the
> contributors who initiated them, or are they still all uploaded under a
> single username?
>
> Best,
>
> Claire
>
>
> On Wed, Mar 22, 2017 at 5:38 PM, Dale Kunce <dale.kunce at gmail.com> wrote:
>
>> I forgot to mention that we are spending a lot of time to update and get
>> better documentation on POSM out there. Just this week we started to work
>> on the content for a better website. The site is not complete and many
>> things will be changing but it will give you a good idea of the content we
>> are creating. If you have any suggestions please file the issues here
>> https://github.com/posm/posm.io/issues
>>
>> https://posm.github.io/posm.io/
>>
>>
>>
>> On Wed, Mar 22, 2017 at 9:34 AM, Dale Kunce <dale.kunce at gmail.com> wrote:
>>
>>> POSM was developed exactly for this type of use case. The status.md
>>> isn't up to date and should be ignored.
>>>
>>> POSM does host imagery with the new OpenDroneMap module. You can add a
>>> tiff and it will be served as a TMS. You an also add any MBTile archive
>>> (bing) and have that served as well. POSM is designed to take an AOI, use
>>> collected imagery, host field papers, and have support for mobile data
>>> surveys all offline.
>>>
>>> Happy to answer any questions that anyone might have.
>>>
>>> Dale
>>>
>>>
>>> On Wed, Mar 22, 2017 at 9:08 AM, Joseph Reeves <iknowjoseph at gmail.com>
>>> wrote:
>>>
>>>> Thanks John, but I'm mostly certain POSM doesn't host imagery:
>>>> https://github.com/posm/posm/blob/master/STATUS.md
>>>>
>>>> Looks like it could be a good feature to add though! Looks like Dale
>>>> has opened an issue on it already: https://github.com/po
>>>> sm/posm/issues/277
>>>>
>>>> Cheers, Joseph
>>>>
>>>>
>>>>
>>>> On 22 March 2017 at 15:58, john whelan <jwhelan0112 at gmail.com> wrote:
>>>>
>>>>> an old post giving details.
>>>>>
>>>>> John
>>>>>
>>>>> Matt Sayler <matt.sayler at gmail.com>
>>>>> 15/08/2016
>>>>> to me, Laura, hot
>>>>> POSM & Red Cross had an excellent presentation at SOTMUS, and Seth
>>>>> mentioned he'd be willing to set some up for the cost of hardware and
>>>>> brownies (I assume that will become dependent on demand/appetite):
>>>>> http://stateofthemap.us/2016/field-mapping-at-scale/
>>>>>
>>>>>
>>>>> Nutshell: POSM is for mapping in low/no service areas. It can serve
>>>>> as a local, disconnected OSM server, which can later push changes up to the
>>>>> main OSM when in an area with service. They primarily use Intel NUC's
>>>>> (~$350 for all hardware, runs off ~6w), but have installed it on Rasberry
>>>>> Pi, Intel Edison, Beagle Bone, etc. I'm not aware of them doing a usb
>>>>> bootable install, but might be possible? Red Cross uses $50 Android phones
>>>>> & Field Papers for doing the mapping.
>>>>>
>>>>> Pretty freaking cool project!
>>>>>
>>>>> https://github.com/AmericanRedCross/posm
>>>>>
>>>>> On 22 March 2017 at 11:53, Joseph Reeves <iknowjoseph at gmail.com>
>>>>> wrote:
>>>>>
>>>>>> > In a windows environment its fairly easy to configure.  In the
>>>>>> security tabs for the folder you just make the folder shareable but read
>>>>>> only.
>>>>>>
>>>>>> There's OSM editors that will source imagery over SMB? I've never
>>>>>> looked into it, but I'd be surprised.
>>>>>>
>>>>>> Thinking about this very quickly, my points would be:
>>>>>>
>>>>>> 1: RAID: I'd want some disk redundancy as the device is likely to be
>>>>>> used in tough environments that are far from good sources of replacement
>>>>>> disks, or replacement imagery.
>>>>>> 2: Software: As already mentioned, you're going to need some software
>>>>>> to serve the tiles. WMS? You'd want a device that was easy to get running
>>>>>> with third party software. Performance may also be an issue, depending on
>>>>>> how many people you were catering for.
>>>>>>
>>>>>> I hope someone will come along with an example of what they've
>>>>>> managed to do before. If not it should be a fun exercise :)
>>>>>>
>>>>>> Cheers, Joseph
>>>>>>
>>>>>>
>>>>>>
>>>>>> On 22 March 2017 at 15:42, john whelan <jwhelan0112 at gmail.com> wrote:
>>>>>>
>>>>>>> Are you looking for information on how to do it?  On suggested
>>>>>>> hardware?
>>>>>>>
>>>>>>> Essentially for this purpose I see no reason why one local machine
>>>>>>> such as a lap top couldn't feed the others.  In a windows environment its
>>>>>>> fairly easy to configure.  In the security tabs for the folder you just
>>>>>>> make the folder shareable but read only.
>>>>>>>
>>>>>>> Have you  looked at POSM?  (Portable OSM) they may have this already
>>>>>>> worked out and documented for the field.
>>>>>>>
>>>>>>> Thanks John
>>>>>>>
>>>>>>> On 22 March 2017 at 11:22, Claire Halleux <claire.halleux at hotosm.org
>>>>>>> > wrote:
>>>>>>>
>>>>>>>> Hello HOT Community,
>>>>>>>>
>>>>>>>> I'm currently looking into NAS specifications for serving imagery
>>>>>>>> tiles locally for OSMapping purposes. The NAS would be coupled to a router
>>>>>>>> accessible to the mappers. Contributors would still be connected to the
>>>>>>>> relatively slow Internet for downloading/uploading their data but the idea
>>>>>>>> is to get the ability to load imagery tiles much faster and access
>>>>>>>> additional images, in particular during mapathons.
>>>>>>>>
>>>>>>>> Therefore I would welcome any feedback from people, organisations
>>>>>>>> or communities using similar hardware to support data digitizing.
>>>>>>>>
>>>>>>>> Thank you!
>>>>>>>>
>>>>>>>> Claire
>>>>>>>>
>>>>>>>> Claire Halleux
>>>>>>>> +243 81 611 6998 (Kinshasa, DRC)
>>>>>>>> OpenStreetMap RDC
>>>>>>>>
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>>>>>>>>
>>>>>>>>
>>>>>>>
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>>>>>>>
>>>>>>
>>>>>
>>>>
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>>>
>>>
>>> --
>>> sent from my mobile device
>>>
>>> Dale Kunce
>>> http://normalhabit.com
>>>
>>>
>>
>>
>> --
>> sent from my mobile device
>>
>> Dale Kunce
>> http://normalhabit.com
>>
>>
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>

-- 
sent from my mobile device

Dale Kunce
http://normalhabit.com
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