Cadence in gpx file

Hi Orux,
do you plan on saving the cadence data into the gpx file?
Thanks
Fabrizio

up

I want to support this one.

this would be a great improvement. why have cadence if you cant use it for post ride eval?

I would like this feature as well

boony wrote:I would like this feature as well

Please, try last beta--> www.oruxmaps.com/cs

orux

Thank you Orux
I'll test it tomorrow, if it stops raining... it's always raining!

Hi Orux,
cadence data are correctly recorded into the gpx file, but sporttracks doesn't load them, I also tried with gpsbabel but nothing.
So I tried to look into the gpx:
one sample point:

Code:


<trkpt lat="45.54617633" lon="10.22522513">
<ele>170.56</ele>
<time>2013-03-29T10:38:09Z</time>
   <extensions>
      <gpxtpx:TrackPointExtension>
         <gpxtpx:hr>117</gpxtpx:hr>
      </gpxtpx:TrackPointExtension>
   </extensions>
   <extensions>
      <gpxtpx:TrackPointExtension>
         <gpxtpx:cad>0.0</gpxtpx:cad>
      </gpxtpx:TrackPointExtension>
   </extensions>
</trkpt>


The problem is the closing and immediately opening of tag "extensions" after the hr data. I modified all the points simply removing

Code:


   <gpxtpx:TrackPointExtension>
</extensions>
<extensions>
   <gpxtpx:TrackPointExtension>


Now the points are like this:

Code:


<trkpt lat="45.54617633" lon="10.22522513">
<ele>170.56</ele>
<time>2013-03-29T10:38:09Z</time>
<extensions>
   <gpxtpx:TrackPointExtension>
      <gpxtpx:hr>117</gpxtpx:hr>
      <gpxtpx:cad>0.0</gpxtpx:cad>
   </gpxtpx:TrackPointExtension>
</extensions>
</trkpt>


And cadence is loaded correctly in sporttracks.
Thank you for this amazing app
Fabrizio

Ps. What do you think about adding the millisecond data in the time field? Since I believe the polling isn't exactly every 1000ms, but, judging from the gpx points, every ~1050ms, it would add precision to the data. Gpx data accept time with milliseconds formatted like
<time>2013-03-29T10:38:09.125Z</time>

fabrylama wrote:Hi Orux,
cadence data are correctly recorded into the gpx file, but sporttracks doesn't load them, I also tried with gpsbabel but nothing.
So I tried to look into the gpx:
one sample point:


The problem is the closing and immediately opening of tag "extensions" after the hr data. I modified all the points simply removing



Now the points are like this:

And cadence is loaded correctly in sporttracks.
Thank you for this amazing app
Fabrizio

Ps. What do you think about adding the millisecond data in the time field? Since I believe the polling isn't exactly every 1000ms, but, judging from the gpx points, every ~1050ms, it would add precision to the data. Gpx data accept time with milliseconds formatted like
<time>2013-03-29T10:38:09.125Z</time>

Thanks;

try with last beta-->www.oruxmaps.com/cs

joined hr & cad if exists,

added miliseconds to the timestamps. But be careful! The gps point timestamp is correct, but the value of pulse and/or cadence may correspond to a point in time earlier/later, in a range of +/-3 seconds. Note that the sensors events occur in different time moments.

orux

orux wrote:
Thanks;

try with last beta-->www.oruxmaps.com/cs

joined hr & cad if exists,

added miliseconds to the timestamps. But be careful! The gps point timestamp is correct, but the value of pulse and/or cadence may correspond to a point in time earlier/later, in a range of +/-3 seconds. Note that the sensors events occur in different time moments.

orux

I'll test asap, thank you also for the milliseconds! A few seconds delay in the ant data is not a problem!
Fabrizio

Hi orux, cadence works perfectly, also milliseconds are recorded correctly, but I just discovered that sporttracks has problems managing gpx with milliseconds in the timestamp, it loads them fine, but the speed graph is very erratic, with a LOT of spikes . I believe it's better to revert back to rounding to the nearest second or at least add an option to switch on/off milliseconds.
Thank you again
Fabrizio

fabrylama wrote:Hi orux, cadence works perfectly, also milliseconds are recorded correctly, but I just discovered that sporttracks has problems managing gpx with milliseconds in the timestamp, it loads them fine, but the speed graph is very erratic, with a LOT of spikes . I believe it's better to revert back to rounding to the nearest second or at least add an option to switch on/off milliseconds.
Thank you again
Fabrizio

Yes, I have found some problems with some apps and miliseconds: I am going to revert that option.

orux

Hi!
Great App!

I've noticed the same problem. I use a Garmin GSC 10 cadence + speed sensor. It works nice in the dashboard, but the data isn't included in the gpx file? Any possibility to change that? I export the data to trainingstagebuch.org and wondered about the missing speed and the strange speed. After checking the gpx file, I saw that the Ant+ data was not included...only the hr data.

Nieschinhio wrote:Hi!
Great App!

I've noticed the same problem. I use a Garmin GSC 10 cadence + speed sensor. It works nice in the dashboard, but the data isn't included in the gpx file? Any possibility to change that? I export the data to trainingstagebuch.org and wondered about the missing speed and the strange speed. After checking the gpx file, I saw that the Ant+ data was not included...only the hr data.

Hi,

try with last beta--> www.oruxmaps.com/cs

orux

Speed also included? In the changelog only cadence is mentioned. I'll try it.

Nieschinhio wrote:Speed also included? In the changelog only cadence is mentioned. I'll try it.

Hi, only cadence,

orux

Any plans to include also speed in an upcoming version?

Any suggestions?

Hey Orux,

I would also be very happy if you could include ANT+ Speed data into the GPX file, as the accuracy of the speed sensor is much higher than the speed computed from GPS data.

Another interesting quantity would be the temperature (in °C, taken from the battery, system board, wherever, I do not know where the temperature sensors are located). Due to the high air convection when being mounted on the stem or the handlebars of a bike, the temperatures shown by my Xperia Active seem to reflect outside air conditions surprisingly accurately ...

Here are some XML tags for including temperature as well, as Garmin does it:
http://www8.garmin.com/xmlschemas/TrackPointExtensionv1.xsd

Thank you very much for any help!

Cheers,

Donpro

donpro wrote:Hey Orux,

I would also be very happy if you could include ANT+ Speed data into the GPX file, as the accuracy of the speed sensor is much higher than the speed computed from GPS data.

Another interesting quantity would be the temperature (in °C, taken from the battery, system board, wherever, I do not know where the temperature sensors are located). Due to the high air convection when being mounted on the stem or the handlebars of a bike, the temperatures shown by my Xperia Active seem to reflect outside air conditions surprisingly accurately ...

Have to agree with 'donpro': addition of the ability to log temperature would be nice! I als own a Xperia Active, and I use the IpBike app, which logs temperature. It even has two options: logging with the temperature sensor of the battery, or with the external 'Garmin Tempe' (ANT+) sensor.

I have the Garmin Tempe, and it works very well. Would be great if I could also use it in Oruxmaps (IpBike is ideal for biking, not so good for hiking). Any chance of getting it to work in one of the feature updates? Thanks in advance!

Hey Orux,

I'm also interested in the inclusion of ANT+ speed data in the gpx file, which is much more accurate than the speed computed from GPS data. That would be a another great feature!

Thank you!

All the best,

Donpro

donpro wrote:Hey Orux,

I'm also interested in the inclusion of ANT+ speed data in the gpx file, which is much more accurate than the speed computed from GPS data. That would be a another great feature!

Thank you!

All the best,

Donpro

Hi, as far as I know speed data can't be added to the gpx format.

Hi,

thank you for your response!

Searching the web, I found something under OPTIONAL ELEMENTS on
http://www.topografix.com/gpx_manual.asp
There exists a tag <speed>, which can be used under <trkpt>:
Optional in: <wpt> <rtept> <trkpt>
Units: meters per second
<speed>4.23</speed>
Instantaneous speed at the point.

Did I get it wrong?

Nevertheless, I don't really care about gpx, I would also be interested if the ANT+ speed (like heartrate and cadence) is stored somewhere in the database of Oruxmaps? A ascii or csv-export would also be interesting for me, using it for a simple analysis of track data (for example, using LibreOffice Calc).

All the best

Donpro

donpro wrote: Hi,

thank you for your response!

Searching the web, I found something under OPTIONAL ELEMENTS on
http://www.topografix.com/gpx_manual.asp
There exists a tag <speed>, which can be used under <trkpt>:
Optional in: <wpt> <rtept> <trkpt>
Units: meters per second
<speed>4.23</speed>
Instantaneous speed at the point.

Did I get it wrong?

Hi, that's valid for gpx 1.0 which is not updated, with gpx 1.1 the tag "speed" is no longer present.
Of curse Orux could define his own tag extension for speed, but then no software would be able to read the gpx.

donpro wrote:
Nevertheless, I don't really care about gpx, I would also be interested if the ANT+ speed (like heartrate and cadence) is stored somewhere in the database of Oruxmaps? A ascii or csv-export would also be interesting for me, using it for a simple analysis of track data (for example, using Libreoffice cals).

I second this!


Also Orux, if you are reading this, would you consider implementing also the tcx export? I think it would be fast to develop, because there are many code sample for tcx generation, like the mytracks tcx library, released with a CC 3.0 BY-SA license. With tcx you could use the "distance" field to record the speed data.

Fabrizio