[IIAB] [XSCE] RE: [UKids] Re: [support-gang] Taking OpenStreetMap Offline - DESIGN Call - Thur June 11, 10AM EDT / 2PM UTC

Mon Jun 15 18:31:38 PDT 2015

I describe some of the OpenStreetMap rendering work I did for IIAB in this
video starting about 34 minutes in:

https://youtu.be/pR2mL0HVUGU?t=34m4s

-braddock

On Mon, Jun 15, 2015 at 5:39 PM, Braddock Gaskill <braddock at braddock.com>
wrote:

> In IIAB we use a dataset of populated places to render at the highest
> resolution level, and render the rest of the world at a slightly lower
> resolution.  Our highest resolution is high enough to see individual
> buildings.  Our total dataset of rendered tiles for the world with detailed
> populated places coverage is 100GB.
>
> Another optimization we made for IIAB that contributed considerable
> dataset size reduction and helped with filesystem efficiency - we use the
> OSM "meta" tiles, which normally store 64 tile png images, but we modify
> them to store 4096 png images per file, and we made an optimization so that
> identical tiles are removed (think of all the blue of the ocean cover 75%
> of the earth).
>
> We use Leaflet as our javascript web front end, and it works quite well.
>
> -braddock
>
>
> On Sun, Jun 14, 2015 at 11:24 PM, Nick Doiron <ndoiron at mapmeld.com> wrote:
>
>> I don't think there's any technical issues with rendering the world at 10
>> and specific countries at 16, other than the human knowing where they can
>> and cannot zoom
>>
>> -- Nick
>>
>> On Sun, Jun 14, 2015 at 11:58 AM, Tim Moody <tim at timmoody.com> wrote:
>>
>>> couple of observations:
>>>
>>>
>>>
>>> As expected, the new tiles have a lot more detail.
>>>
>>>
>>>
>>> There are more levels of zoom in the new ones.
>>>
>>>
>>>
>>> Some names have changed - the old map had Lalitpur and the new one has
>>> Patan (both are used)
>>>
>>>
>>>
>>> I don't see any boxes for unprintable characters, but there is a lot
>>> less Devanagari. (Google maps has more)
>>>
>>>
>>>
>>> Is it possible to merge individually generated regional tiles?  for
>>> example if you rendered India and Nepal separately would you get both?
>>>
>>>
>>>
>>> What happens if you render the world at level 10 and then specific
>>> countries at 16?
>>>
>>>
>>>
>>> *From:* xsce-devel at googlegroups.com [mailto:xsce-devel at googlegroups.com]
>>> *On Behalf Of *Anish Mangal
>>> *Sent:* Saturday, June 13, 2015 10:06 PM
>>> *To:* Jérôme Gagnon-Voyer
>>> *Cc:* xsce-devel; Community Support Volunteers -- who help respond to
>>> help AT laptop.org; Unleash Kids!; server-devel; iaep; Internet In a
>>> Box Working Group; Jaakko Helleranta
>>> *Subject:* Re: [XSCE] RE: [UKids] Re: [support-gang] Taking
>>> OpenStreetMap Offline - DESIGN Call - Thur June 11, 10AM EDT / 2PM UTC
>>>
>>>
>>>
>>> Hi,
>>>
>>> Following from the skype call this week, I uploaded Nepal's OSM data in
>>> postgres and render tiles to see performance, and as expected, everything
>>> is blazing fast.
>>>
>>> The pbf file went into the postgress in less than 5 minutes, and tiles
>>> are being rendered pretty fast as well.
>>>
>>> You can check it yourself by going to
>>> http://home.braddock.com:28112/osm/slippymap.html
>>>
>>> * Select Mapnik
>>>
>>> * Zoom out and center over Nepal
>>>
>>> * Select Local tiles
>>>
>>> * Zoom in
>>>
>>> I don't know what this "proves" as the bottleneck still is doing this
>>> for the entire planet, which we need to figure out a way for anyway.
>>>
>>> Best,
>>>
>>> Anish
>>>
>>>
>>>
>>>
>>>
>>> On Sun, Jun 14, 2015 at 6:02 AM, Anish Mangal <anishmg at umich.edu> wrote:
>>>
>>> Hi Jérôme,
>>>
>>> I incorporated one of your comments; as for the other I think Timm, Nick
>>> would be better suited for the discussion (python backend v/s frontend js).
>>> :-)
>>>
>>> Best,
>>>
>>> Anish
>>>
>>>
>>>
>>> On Sun, Jun 14, 2015 at 3:22 AM, Jérôme Gagnon-Voyer <gagnonje at gmail.com>
>>> wrote:
>>>
>>> Hi Anish
>>>
>>>
>>>
>>> Great document. I've added 2 comments to the document, feel free to
>>> incorporate into the document if that makes sense.
>>>
>>>
>>>
>>> Also added a TODO for myself to do more research about the various
>>> search solutions.
>>>
>>> I've used Nominatim in the past (on the client side, not the server
>>> infrastructure) and it was overall very good, but I'll want to know more
>>> about the other ones.
>>>
>>>
>>>
>>> On Sat, Jun 13, 2015 at 12:51 PM, Tim Moody <tim at timmoody.com> wrote:
>>>
>>> Thanks, Anish for an excellent start at getting this down on paper (so
>>> to speak).  I think this covers things pretty well and gives us the
>>> necessary hooks on which to hang the details as we begin fleshing out
>>> solutions to the requirements you documented.
>>>
>>>
>>>
>>> Under issues I added one point about rendering non-Roman character sets.
>>>
>>>
>>>
>>> *From:* unleashkids at googlegroups.com [mailto:
>>> unleashkids at googlegroups.com] *On Behalf Of *Anish Mangal
>>> *Sent:* Saturday, June 13, 2015 12:15 PM
>>> *To:* Community Support Volunteers -- who help respond to help AT
>>> laptop.org
>>> *Cc:* Unleash Kids!; server-devel; xsce-devel; iaep; Internet In a Box
>>> Working Group; Jaakko Helleranta
>>> *Subject:* [UKids] Re: [support-gang] Taking OpenStreetMap Offline -
>>> DESIGN Call - Thur June 11, 10AM EDT / 2PM UTC
>>>
>>>
>>>
>>> Okay, so I tried to encapsulate whatever we discussed into a design
>>> document, which can hopefully serve as a base for reaching out to the OSM
>>> community and to better organize our own thoughts.
>>>
>>>
>>> https://docs.google.com/document/d/1LWsN-cPH3lvMuXS-f0Tk8IWVh-3X808WoIt0OJ-QNt8/edit#
>>> <https://docs.google.com/document/d/1LWsN-cPH3lvMuXS-f0Tk8IWVh-3X808WoIt0OJ-QNt8/edit>
>>>
>>> Please feel free to edit the information there as I may have missed some
>>> points, or interpreted them differently than as intended.
>>>
>>> Best,
>>>
>>> Anish
>>>
>>>
>>>
>>> On Fri, Jun 5, 2015 at 12:00 AM, Adam Holt <holt at laptop.org> wrote:
>>>
>>> Who's attending http://stateofthemap.us at the UN in NYC this weekend?
>>>
>>> Who's most serious about bringing OpenStreetMap's opportunities and
>>> rapid progress into the hands of the world's offline poor -- kids and all,
>>> American and Swahili?  Wanna Take This Map Outside, offline and off the
>>> grid, where we all belong/began?
>>>
>>> http://Internet-in-a-Box.org and similar efforts have made a gigantic
>>> 1st step: in Ghana and Rwanda I could never have imagined better reviews to
>>> our 2015 deployments begun there in recent months.  Many are now changing
>>> the game increasingly for the Bottom BillionS, among many who've literally
>>> never seen a globe before, nevermind a map of their own towns.  Both in
>>> OLPC (school) contexts, in libraries, on Nepali hillsides where folks don't
>>> have proper homes, and far beyond --- perspectives (literally) are about to
>>> change.
>>>
>>> But modern phones today contain more than enough gigabytes to display
>>> ALL OpenStreetMap map detail within most countries, and yet they do not
>>> yet, WHY?  Where are the Khan Academies and KA Lites of OSM (OpenStreetMap)
>>> bringing new classroom/journalistic rubrics, freeing everyone's "brain
>>> software" to explore and document our own communities in our own languages?
>>>
>>> *Who Will Take The Next Steps?*
>>> *What engineering middleware, distribution vectors, community/economic
>>> models, and final field packagings will get us all there & beyond?*
>>>
>>> *Will offline edit-contributions prove impossible, much like with
>>> Wikipedia in Peru, when offline kids edit overly stale
>>> OpenStreetMap/Wikipedia images a year before/later?*
>>>
>>>
>>>
>>> As such the wider OLPC community is hosting a DESIGN Call to bring
>>> forward ideas across the OpenStreetMap landscape, fertilizing our immediate
>>> work with school server projects like http://schoolserver.org,
>>> http://xsce.org, https://en.opensuse.org/openSUSE:Education-Li-f-e
>>> ETC.  Ministries of Education in India elsewhere are watching closely,
>>> expressly eager to help if we can point the way.  All giving our "2020
>>> Vision" questions very practical and immediate "customers" well before
>>> 2020, much like Garmin GPS units fed a wonderful ecosystem of geo-specific
>>> "gmapsupp.img" offline map files over the past decade:
>>> http://wiki.openstreetmap.org/wiki/OSM_Map_On_Garmin/Download
>>>
>>> That decade's now done: what IS our framework for the coming decade?
>>> Please join us if you have strategic/partnership ideas towards making
>>> Offline OSM Designs happen, *Thank You !!*
>>>
>>>
>>>
>>> 10AM New York Time / 2PM UTC
>>>
>>> Thursday, June 11th
>>>
>>> RSVP with your Skype username, if we are more than 15-20 we'll use an
>>> industrial conference call system instead!
>>>
>>>
>>> CONCLUSION: Could OpenStreetMap be the very ultimate in Constructionist
>>> Learning Projects, replacing OLPC in coming years, on a quickly
>>> shrinking/endangered but still green-in-parts planet?  Regardless, how to
>>> build the OLPC Movement's offline/civic learning successes, consciously
>>> learning from its community infrastructural mistakes?  Nick Doiron (
>>> http://mapmeld.com) and Anish Mangal (
>>> https://in.linkedin.com/in/anishmangal) who've spent years thinking
>>> about this topic will lead the discussion, agenda is entirely yours!
>>> OPTIONAL: submit agenda items in advance right here:
>>>
>>>
>>> https://docs.google.com/document/d/1o6QtzLb6e58YKWqMf_junux2XyBRLFm31un8YLcYslg
>>>
>>>
>>>
>>> *< forward invitation to Twitter/wherever as appropriate >*
>>>
>>>
>>> --
>>>
>>> Unsung Heroes of OLPC, interviewed live @ http://unleashkids.org !
>>>
>>>
>>> _______________________________________________
>>> support-gang mailing list
>>> support-gang at lists.laptop.org
>>> http://lists.laptop.org/listinfo/support-gang
>>>
>>>
>>>
>>> --
>>> Unsung Heroes of OLPC, interviewed live @ http://unleashkids.org !
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>>>
>>>
>>>
>>>
>>>
>>> --
>>>
>>> Jérôme Gagnon-Voyer
>>>
>>>
>>>
>>> --
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>  --
> Unsung Heroes of OLPC, interviewed live @ http://unleashkids.org !
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