Re: [Gpsbabel-misc] how to add speed to .gpx

[Marek J. <jan...@gm...>]

Thans to communication with GPS visualiser facebook we localized the
problem I thing - when I remove points wit the same time and position and
then I try gpsbabel -t -i gpx -f some.gpx -x track,speed -o gpx,gpxver=1.0
-F output.gpx the output looks better

Marek

so 30. 12. 2017 v 19:35 odesílatel Marek Janata <jan...@gm...>
napsal:

> Hi,
>
> no, my question is about missing speed information - I have .gpx file
> saved from gopro 6 .MP4 video
>
> But without speed informations - I'm looking for program which can
> calculate and add this information to new .gpx. My next thing is us
> gpsbabel to make .srt title with speed, course, altitude
>
> under windows can I use quick, dashware, wirb-edit - under linux I found
> gpsbabel, zdila gpxanimator, gps-overlay-on-video-master, David Stillman
> scripts - but without (correct) speed
>
> gpsbabel version is  1.5.4
> I attach my .gpx from video to the attachment
>
> when I try the topografix.com the speed graf look good
>
> Marek
> so 30. 12. 2017 v 18:42 odesílatel tsteven4 <tst...@gm...> napsal:
>
>> Are you questioning the units of the speed element in the output gpx file?
>>
>> The gpx 1.0 speed element units are required to be meters per second.
>> see http://www.topografix.com/gpx_manual.asp
>>
>> If this isn't your question please supply an input file, the command line
>> you are using, the version of GPSbabel, and let us know specifically what
>> you think is wrong with the output.
>>
>> Steve
>>
>> On 12/29/2017 11:43 PM, Marek Janata wrote:
>>
>>
>> Hi,
>>
>> May I ask You please?
>>
>> Can I add right speed label to .gpx with gpsbabel?
>> I found this: gpsbabel -t -i gpx -f gps.gpx -x track,speed -o
>> gpx,gpxver=1.0 -F output2.gpx
>> But the speed informantion are wrong - when I try for examlpe this:
>> http://utrack.crempa.net/ speed looks good
>>
>> Can I do this with gpsbabel, or must I try something else?
>>
>> best regards
>>
>> Marek
>>
>>
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