On Thu, May 23, 2013 at 8:48 AM, Jingmin Chen <[email protected]> wrote: > 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. As Martin and other have brought up, there are multiple issues about this. With such a large (30 second) interval, you don't capture a lot of information about traffic patterns or speed, but as you say, with sufficient density, you would gain a lot of street centerline data, which can be extremely useful in an area where we don't have much data. Since there are concerns about the data itself, may I'd like to suggest an entirely different approach than using the GPX data as GPX data, one that should achieve the same result. Take the GPX data and render them simply as points on a map (a slippymap). You could use something like TileMill and even a large city would be fairly easy to do. Then, you don't have to worry about stripping anonymizing the data. From there, people can make simple traces in the same way they'd do from josm. The nice part in making imagery is that then people could use that imagery from other tools like Potlatch or iD very easily. - Serge _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/listinfo/dev
