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

Mon Jun 15 20:39:02 EDT 2015

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
>>
>>
>>
>> --
>>
>>
>>
>>
>>
>>
>>
>
>
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