hello barry,

thank you very much for your help!

we managed to do what you said and it basicaly worked - there only is a
problem with our file, but we will create the file again and then it should
work completely. i will keep you posted how it turned out. thanks again!

marion



2012/1/2 Barry Rowlingson <b.rowlingson@lancaster.ac.uk>

> On Mon, Jan 2, 2012 at 3:54 PM, Barry Rowlingson
> <b.rowlingson@lancaster.ac.uk> wrote:
>
> >  That looks suspiciously like a chunk of a GPX format file - GPS
> > tracks, that kind of thing. Am I right?
> >
> > If so, then get the rgdal package, and read it in. You'll end up with
> > a spatial data frame of some kind from which you can get the points
> > and times.
> >
> > http://en.wikipedia.org/wiki/GPS_eXchange_Format
>
> Specifically, if I put that snippet of yours into a GPX file, I can do:
>
>  > trk= readOGR("m.gpx","track_points")
>
>  > trk
>         coordinates track_fid track_seg_id track_seg_point_id ele
> 1   (16.343, 48.272)         0            0                  0 387
> 2 (16.3436, 48.2719)         0            0                  1 381
>                    time magvar geoidheight name  cmt desc  src link1_href
> 1 2012/01/01 15:32:03+00     NA          NA <NA> <NA> <NA> <NA>       <NA>
> 2 2012/01/01 15:32:34+00     NA          NA <NA> <NA> <NA> <NA>       <NA>
>  link1_text link1_type link2_href link2_text link2_type  sym type  fix sat
> 1       <NA>       <NA>       <NA>       <NA>       <NA> <NA> <NA> <NA>   9
> 2       <NA>       <NA>       <NA>       <NA>       <NA> <NA> <NA> <NA>   9
>  hdop vdop pdop ageofdgpsdata dgpsid
> 1   NA   NA   NA            NA     NA
> 2   NA   NA   NA            NA     NA
>
>  - obviously there's a lot of stuff there you don't need, so you can do:
>
>  > trk@data=trk@data[,c("ele","time","sat")]
>  > trk
>         coordinates ele                   time sat
> 1   (16.343, 48.272) 387 2012/01/01 15:32:03+00   9
> 2 (16.3436, 48.2719) 381 2012/01/01 15:32:34+00   9
>
> Barry
>

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