[Qgis-user] GPX data in QGIS.

[J. M]

Hi again Garth,

Well I parked this problem and only just came back to it. I may have missed
something, but when I create the new fields you suggested in the Track they
contain no information. Is this a very advanced procedure? It seems like
something quite basic, but perhaps I've underestimated it (as I usually do
with QGIS!).

Kind regards,
Jimi.

On Fri, Sep 11, 2020 at 11:51 AM J. M <jimimckay at gmail.com> wrote:

> Hi Garth,
>
> Thanks a lot for the very complete answer! I'll give it a go as soon as I
> resolve an unrelated Ubuntu problem. I hadn't realised that GPX data wasn't
> automatically visible in Properties, and that fields had to be created.
>
> Kind regards,
> Jimi.
>
> On Fri, Sep 11, 2020 at 4:26 AM Garth Fletcher <garth at jacqcad.com> wrote:
>
>> On 10 Sep 2020 at 20:12, J. M <jimimckay at gmail.com> wrote:
>> > I can successfully import .gpx files into QGIS, and they are visible and
>> > can be clustered in new groups (waypoints, tracks and routes appear as
>> > independent layers). The problem I'm having is that I can't seem to find
>> > any way to access the data about the routes (distance, time, etc) which
>> is
>> > clearly visible in the app I used to create the tracks
>>
>> The GPX file contains a number of fields whose contents you can see /
>> access in the layer's Attribute Table
>>   right-click on layer and choose Open Attribute Table
>>
>> However, these are only the extra fields in the GPX records but
>> NOT including the x,y coordinates (Long,Lat)
>>
>> To access the later, use the Field Calculator
>>   select the layer
>>   click on Open Field Calculator icon (Abaccus) in the menu bar
>>      which is next to the Open Attribute Table icon in menu, or
>>    in Processing > GDAL > Vector Table > Field Calculator
>>
>> create new fields, called Lat and Long, as decimal numbers
>> and enter the expression $X or $Y (see Geometry > for details)
>> When you click OK, the new fields will be appended and filled in
>> with the right values.
>>
>> You can then access them in the layer's Attribute Table.
>>
>> With those 2 extra fields you essentially have access to everything
>> that was recorded in the GPX file.
>>
>> You can also use Field Calculator to add more fields and populate
>> them with calculation results.
>>
>> As an aside, Field Calculator cannot create new fields in the GPX
>> file; instead it creates them as temporary virtual fields.
>>
>> A better approach is to first save the data in a shape file
>>   right-click on layer, choose Export > Save selected features
>> then open that file instead of the original GPX.
>> Field Calculator will add new fields to that format.
>>
>> Cordially,
>> --
>> Garth Fletcher
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