[
Date Prev][
Date Next][
Thread Prev][
Thread Next][
Date Index][
Thread Index]
[
List Home]
|
Re: [location-iwg] Minutes from today's LocationTech call
|
Thinking on it OTP probably isn't the solution for mobile, for the reasons you mention. But they're super friendly and I'm sure would help out thinking on the problems. And have tried out a lot of different techniques. Right now they load the whole graph up in memory - to some extent the low price of memory is an enabling technology for real efficient routing. But mobile devices probably still don't have enough memory to do that well.
You know, OpenTripPlanner could potentially be a decent match for this group - since we're 'location', not just 'gis'. It's already got a great community, could be a win/win for all involved, and would be good to have them close to this community. I'll feel them out to see if there might be interest on their end, and perhaps they could do a presentation to see if there's interest on the location tech end.
C
On Mon, Jul 30, 2012 at 8:18 AM, Paul Spencer
<pspencer@xxxxxxxxxxxxxx> wrote:
Hi Chris,
I looked into this project recently and it seems pretty awesome. Being Java-based, it wouldn't work on iOS but I'd be curious how well it could be made to run on Android devices. An objective-c port of the code probably wouldn't be too strenuous.
There are two key factors in getting routing and vector rendering onto mobile devices - minimizing the size of data sets for any given region (save data transfer costs and on-device space), and producing near-real time results.
For routing, I suspect the two are somewhat mutually exclusive. From what I've read of routing algorithms, the "continental" scale algorithms tend to rely on huge pre-built indexes to achieve impressive performance. In looking briefly at Project OSRM, for instance, the size of the index files for even a moderately sized region would be prohibitive for most devices on the market today.
Cheers
Paul
If you're looking at routing I highly recommend checking out http://opentripplanner.org/
It's not really optimized to run directly on mobile devices offline right now, but could potentially be improved for that. It's a great set of code, a solid community, and a bunch of production users. It'll also be the basis of this -
http://www.kickstarter.com/projects/228865951/transit-app-for-ios-6-and-beyond (which I do encourage everyone to support). OpenPlans is the parent organization of OpenGeo, and their transit group is a sister to us.
Chris
On Thu, Jul 26, 2012 at 8:54 AM, Dave McIlhagga
<dmcilhagga@xxxxxxxxxxxxxx> wrote:
Hi Andrew,
We have a requirement over the next 1-2 years for a set of libraries to support client-side map rendering and routing in mobile/tablet devices. This would be capability that would have to run off-line on the devices.
Currently there are no open source packages that support all of this, and that have commercial-friendly licensing.
We're prepared to make some resource commitments to this initiative over the next couple of years, but need additional partners to be involved -- we're hoping we can find some friendly faces around the Eclipse table to move this forward.
Paul Spencer would be willing to provide a presentation outlining a vision for what these software packages might look like -- and perhaps we could have a discussion with other participants at the next meeting? Let us know if this would be of interest to the group.
Thanks,
Dave
Dave McIlhagga
dmcilhagga@xxxxxxxxxxxxxx
p: 613-565-5056 x301
www.dmsolutions.ca
location-iwg mailing list
location-iwg@xxxxxxxxxxx
http://dev.eclipse.org/mailman/listinfo/location-iwg
__________________________________________
Paul Spencer
Chief Technology Officer
DM Solutions Group Inc
_______________________________________________
location-iwg mailing list
location-iwg@xxxxxxxxxxx
http://dev.eclipse.org/mailman/listinfo/location-iwg
