<ele> tag missing from GPX <trkpt> if elevation == 0 about gpxpy HOT 2 CLOSED

I'm not on my computer now, but there was a similar issue recently. I
pushed a branch which fixes it and maybe it fixes your one, too. It's not
yet merged in master. Can you try it to see if it works properly there?

On Sat, May 28, 2016, 07:24 tmecha [email protected] wrote:

Using gpxpy 1.1.1, GPX 1.1, and python 3.4
I had some issues where tags were missing, turn out if gpx_point.elevation
= 0 as floating point type then tag doesn't make it through.

A couple locations where elevation = 0 fails comparisons:
gpx.py line 1280 in def has_elevations(self):
if track_point.elevation:
found += 1

I changed this to:
if track_point.elevation is not None:
found += 1

This way the value of 0 is still allowed.
I also believe the following statement in gpxfield.py incorrectly removes
a 0 tag:
def to_xml(self, value, version):
if not value:
return ''

and should be:
def to_xml(self, value, version):
if value is None:
return ''

There must be another location where elevation==0 gets filtered out. I
made it this far then was in time crunch so did my own conversion of float
to string when assigning elevation and it worked.

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:wq!

from gpxpy.

Merged to master, it should work now:

$ python -m unittest test.MinidomTests.test_zero_latlng
<?xml version="1.0" encoding="UTF-8"?>
<gpx xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.topografix.com/GPX/1/0" xsi:schemaLocation="http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd" version="1.0" creator="gpx.py -- https://github.com/tkrajina/gpxpy">
<trk>
<trkseg>
<trkpt lat="0" lon="0">
<ele>0</ele></trkpt></trkseg></trk></gpx>

from gpxpy.