get speed from gpxpy.GpxTrack

Question

i trying to get speed,course from gpx track my trackPoint

<trkpt lon="77.209995" lat="28.520444"><ele>236.502853</ele><time>2022年02月20日T02:04:51Z</time><extensions><speed>0.788036</speed><course>209.456757</course><hAcc>6.222376</hAcc><vAcc>1.408607</vAcc></extensions></trkpt>

with open('kaggle/input/workout-routes/route_2022年02月02日_8.06pm.gpx', 'r') as gpx_file:
 gpx = gpxpy.parse(gpx_file)
route_info = []
for track in gpx.tracks:
 for segment in track.segments:
 for ind, point in enumerate(segment.points):
 print(point.speed)
 route_info.append({
 'latitude': point.latitude,
 'longitude': point.longitude,
 'elevation': point.elevation,
 'time': np.datetime64(point.time),
 'course': point.course
 })

point.speed = None

i trying to get speed with extensions like this

point.extensions

and get [<Element 'speed' at 0x000001ADBB50A7A0>]

how i can get speed and at it in route_info

Answer 1

To get the speed from the extensions in a GPX track point using gpxpy, you can extract the extension data manually.

First, parse the code using::::

with open('your_gpx_file.gpx', 'r') as gpx_file:
 gpx = gpxpy.parse(gpx_file) 

then repeat through tracks and segments with:

for track in gpx.tracks:
 for segment in track.segments:
 for point in segment.points:
 # Process each point

then extract speed from extension:

speed = None
course = None
for extension in point.extensions:
 if extension.tag == 'speed':
 speed = float(extension.text)
 if extension.tag == 'course':
 course = float(extension.text)

then store the data in list:

route_info.append({
 'latitude': point.latitude,
 'longitude': point.longitude,
 'elevation': point.elevation,
 'time': np.datetime64(point.time),
 'speed': speed,
 'course': course
})

It will give you the list of dictionaries with latitude, longitude, elevation, time, speed, and course for each track point in the GPX file.