Re: [OSM-talk] Old GPS data

2009-07-28 Thread Yann Coupin
Also, and I've already posted here about that a while ago, it would really help if hdop, and eventually vdop, wasn't lost in the anonymization process. This is an important data when tracing, but unless you know who published the track and you can download the source, you don't have access

Re: [OSM-talk] Old GPS Data

2009-07-28 Thread John Smith
--- On Tue, 28/7/09, René Affourtit wrote: > Maybe it's an idea to allow users to specify an area where > traces are outdated? > > So when a junction is reconstructed a local user can place > a bounding > box over that junction and all GPS points in that box are > marked as > outdated (or delet

[OSM-talk] Old GPS Data

2009-07-28 Thread René Affourtit
Sorry to break the threading, Maybe it's an idea to allow users to specify an area where traces are outdated? So when a junction is reconstructed a local user can place a bounding box over that junction and all GPS points in that box are marked as outdated (or deleted, or whatever). Maybe some ex

Re: [OSM-talk] Old GPS data

2009-07-28 Thread John Smith
--- On Tue, 28/7/09, Maarten Deen wrote: > That is not indicative. A road could remain unchanged for > the last 100 years > or could have been demolished last year. What would be the > expiration time of > a track? And would you be prepared to lose correct GPS data > to do this? Also as Liz put,

Re: [OSM-talk] Old GPS data

2009-07-28 Thread Maarten Deen
John Smith wrote: > > --- On Tue, 28/7/09, Maarten Deen wrote: > >> But there is no way to determine if a particular GPS track >> is outdated. Sure, >> you can look at the map and say "I don't see a physical >> road for this track", >> but how would you identify GPS points of a track that is >> in

Re: [OSM-talk] Old GPS data

2009-07-28 Thread John Smith
--- On Tue, 28/7/09, Simone Cortesi wrote: > I'm talking in the long run. Not something to be done in > the coming > moths. Still we are just 5 years old. And not many roads > did change > shape in this short period of time. Some areas have lots of road duplication construction within 5 years o

Re: [OSM-talk] Old GPS data

2009-07-28 Thread Stéphane Brunner
Hello ! One think I think it can be useful is a tool for editing all our old trace : - easy to download all our trace - easy to remove unprecise segment (in some old my trace I have some segment who is 50 m wrong !) - easy to simplify them - easy to re-upload modified trace ! I think that a tool

Re: [OSM-talk] Old GPS data

2009-07-28 Thread Simone Cortesi
On Tue, Jul 28, 2009 at 09:58, John Smith wrote: >> consider having access to older data in separate sets if >> there is concern >> about using old gps tracks, just don't drop any because it >> is "old" (like some >> of us) > Maybe the best option is to let people stipulate how many traces they wa

Re: [OSM-talk] Old GPS data

2009-07-28 Thread Simone Cortesi
On Tue, Jul 28, 2009 at 09:59, John Smith wrote: > > --- On Tue, 28/7/09, Simone Cortesi wrote: > >> GPS are becoming more precise. older tracks are, on a >> general basis, > > You can't make assumptions of the quality of the data based simply on how > recently it was added, someone might be usin

Re: [OSM-talk] Old GPS data

2009-07-28 Thread Roman Neumüller
This doesn't make sense to me. At least there should be a timestamp of gpx-files which tells us when they've been uploaded so that one could filter them a la "show me gpx-files not older than 3 years" ! Roman > On Tue, Jul 28, 2009 at 5:22 AM, Aleksejs Mjaliks wrote: >> Does OSM invalidates GPS d

Re: [OSM-talk] Old GPS data

2009-07-28 Thread John Smith
--- On Tue, 28/7/09, Simone Cortesi wrote: > GPS are becoming more precise. older tracks are, on a > general basis, You can't make assumptions of the quality of the data based simply on how recently it was added, someone might be using an old piece of GPS kit they were given as a hand me down

Re: [OSM-talk] Old GPS data

2009-07-28 Thread John Smith
--- On Tue, 28/7/09, Liz wrote: > please , don't drop data > for many areas we are lucky to have one trace and it may be > a year or more > before another mapper goes back there > > consider having access to older data in separate sets if > there is concern > about using old gps tracks, just

Re: [OSM-talk] Old GPS data

2009-07-28 Thread John Smith
--- On Tue, 28/7/09, Maarten Deen wrote: > But there is no way to determine if a particular GPS track > is outdated. Sure, > you can look at the map and say "I don't see a physical > road for this track", > but how would you identify GPS points of a track that is > invalid? Especialy > for the a

Re: [OSM-talk] Old GPS data

2009-07-28 Thread Liz
On Tue, 28 Jul 2009, Simone Cortesi wrote: > >> Does OSM invalidates GPS data after some time? Otherwise, roads > >> continuously changes and after we will have a big cloud of points that > >> don't make any sense. > > > > No, it doesn't. GPX tracks stay where they are forever and continue > > bein

Re: [OSM-talk] Old GPS data

2009-07-28 Thread Maarten Deen
Simone Cortesi wrote: > On Tue, Jul 28, 2009 at 09:21, Ævar Arnfjörð Bjarmason > wrote: > >>> Does OSM invalidates GPS data after some time? Otherwise, roads >>> continuously changes and after we will have a big cloud of points that >>> don't make any sense. >> No, it doesn't. GPX tracks stay where

Re: [OSM-talk] Old GPS data

2009-07-28 Thread Simone Cortesi
On Tue, Jul 28, 2009 at 09:21, Ævar Arnfjörð Bjarmason wrote: >> Does OSM invalidates GPS data after some time? Otherwise, roads >> continuously changes and after we will have a big cloud of points that >> don't make any sense. > No, it doesn't. GPX tracks stay where they are forever and continue

Re: [OSM-talk] Old GPS data

2009-07-28 Thread Ævar Arnfjörð Bjarmason
On Tue, Jul 28, 2009 at 5:22 AM, Aleksejs Mjaliks wrote: > Does OSM invalidates GPS data after some time? Otherwise, roads > continuously changes and after we will have a big cloud of points that > don't make any sense. No, it doesn't. GPX tracks stay where they are forever and continue being serv

[OSM-talk] Old GPS data

2009-07-27 Thread Aleksejs Mjaliks
Hello! I am currently looking at GPS collected by OSM colleges here at Riga. I see there is data about temporary bridge built during road works and after de-mounted. Does OSM invalidates GPS data after some time? Otherwise, roads continuously changes and after we will have a big cloud of p