Re: gpxlogger with depth storing

[Владимир Калачихин]

06.11.2022 23:29, Gary E. Miller пишет:
> gpx has no field for depth.  It can include other XML schemas, so you
> need to identify one that allows depth that gpxlogger can use.  Then
> changing the code is easy.

Today, there is apparently only one documented scheme left to store 
depth. This is a Garmin extensions:
https://www8.garmin.com/xmlschemas/GpxExtensions/v3/GpxExtensionsv3.xsd

To use this scheme, you must add to the gpx header line:
'
xmlns:gpxx="http://www8.garmin.com/xmlschemas/GpxExtensions/v3";
',
and add shema location to xsi:schemaLocation:
'
xsi:schemaLocation="http://www.topografix.com/GPX/1/1 
http://www.topografix.com/GPX/1/1/gpx.xsd 
https://www8.garmin.com/xmlschemas/GpxExtensions/v3 
https://www8.garmin.com/xmlschemas/GpxExtensions/v3/GpxExtensionsv3.xsd";
'
and after this add to trkpt:
'
<extensions>
        <gpxx:TrackPointExtension>
                <gpxx:Depth>${depth}/gpxx:Depth>
        </gpxx:TrackPointExtension>
</extensions>
'

Here is a plugin for SignalK, similar to the gpxlogger, that does this:
https://github.com/VladimirKalachikhin/naiveGPXlogger

> Or you could ask the GPX people to add depth to their schema.
They are silent.



Владимир Калачихин