[OSM-dev] Import a huge amount of GPS data

[Jingmin Chen]

Hi Martin,

Thank you for your comments. Although 30 seconds are large interval, but
when I aggregate all data in a period from 20,000 vehicles, the trajectory
is very dense, and cover almost all the roads. For legal issue, I will
investigate that. But definitely I am not going to upload the original GPS
data.

J


On Thu, May 23, 2013 at 3:28 PM, Martin Koppenhoefer <dieterdreist at gmail.com
> wrote:

>
> 2013/5/23 Jingmin Chen <jingmin.chen at epfl.ch>
>
>> Dear all,
>>
>> I currently have access to 2 years, 20,000 taxi vehicles GPS trace (30sec
>> interval) of a large city in China. The OSM data quality of that city is
>> really bad. But uploading the raw GPS trace might have legal issues. Is it
>> possible to process the data  to roads before I upload to OSM? Thank you
>> very much for any suggestion.
>>
>
>
>
> Did you have a look at some examples whether this is useful data
> (precision wise and because of the relatively low frequency)? I am not
> aware of the average traffic speed in this town, but in 30 seconds in many
> cities you could move quite "far". Another potential issue, which mappers
> would have to keep in mind when deriving data from these traces, is that
> taxis often have special traffic rules, so it is not given that any car
> could take the same route than a taxi could. And lastly, there might be
> legal issues (AFAIK mapping or registering GPS-traces is forbidden in
> China, at least if you intend to publish them in a foreign country, not
> sure whether you are operating from inside China or from abroad).
>
> cheers,
> Martin
>



-- 
---------
Dr. Jingmin Chen
Scientist
Transport and Mobility Laboratory
School of Architecture, Civil and Environmental Engineering
EPFL - Ecole Polytechnique Fédérale de Lausanne
http://transp-or.epfl.ch/personnal.php?Person=CHEN
Phone: +41-21-693.2532
Fax:     +41-21-693.8060
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