[OSM-talk] Conflating Tracks?

[Kevin Peat]

Not quite the AI solution you are looking for but I use Viking 
(http://sourceforge.net/projects/viking/) as a way of quickly overlaying 
my tracks on OSM maps and then doing a check around the route to see 
what needs doing.

Kevin







Milenko wrote:
> Couldn't you just make an assumption in most cases?  I would think something
> like 15 - 20ft would be OK.  Most roads aren't that close (most!) and I'd
> think most GPS units are at least that accurate (although I have no
> experience with GPS in urban environments).
> 
> Or even better, a site that would let you upload the track and overlay it on
> an OSM map with some options that could be changed in realtime.  This way
> you could fine tune your track if you were in different environments with
> varying levels of GPS accuracy.
> 
> -Jeremy
> 
> 
>> -----Original Message-----
>> From: talk-bounces at openstreetmap.org [mailto:talk-
>> bounces at openstreetmap.org] On Behalf Of Ed Avis
>> Sent: Tuesday, March 10, 2009 10:44 AM
>> To: talk at openstreetmap.org
>> Subject: Re: [OSM-talk] Conflating Tracks?
>>
>> Daniel A Carleton <daniel.carleton <at> exaptic.com> writes:
>>
>>> Are any of you aware of a conflation algorithm that "snaps" GPS tracks
>>> to the street grid?  This could be a useful way to verify existing
>>> road networks and fill in any gaps.  e.g. I go out and ride on city
>>> streets, overlay my GPS track on the OSM grid, and the algorithm shows
>>> me where I traveled over unknown segments of road or deviated a
>>> disproportionate amount.
>> To do that you'd ideally want to know the margin of error for the GPS
>> readings.
>>  My GPS unit (Garmin eTrex Vista HCx) shows an error circle on its
>> screen
>> (giving a tighter circle when there is good reception, and a wider one
>> when the
>> sky is obscured by tall buildings) but on saving the tracks as GPX this
>> information is lost.  Is there a way to export the track log including
>> error
>> circles into a format that the OSM servers recognize?
>>
>> (It appears that I could connect the unit to a laptop and record the
>> tracks with
>> gpsd, but I would prefer to just carry the unit and recover the track
>> log
>> afterwards.)
>>
>> --
>> Ed Avis <eda at waniasset.com>
>>
>>
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> 
> 
> 
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