gpx_interpolate.py

Python script to interpolate GPX files using linear or spline interpolation

Interpolate latitude, longitude, elevation and speed at any spatial resolution

Usage

Script

usage: gpx_interpolate.py [-h] [-d DEG] [-r RES] [-s] FILE [FILE ...]

positional arguments:
  FILE               GPX file(s)

optional arguments:
  -h, --help         show this help message and exit
  -d DEG, --deg DEG  interpolation degree, 1=linear, 2-5=spline (default: 1)
  -r RES, --res RES  interpolation resolution in meters (default: 1)
  -s, --speed        Save interpolated speed

Module

from gpx_interpolate import gpx_interpolate

gpx_data = {'lat':lat,
            'lon':lon,
            'ele':ele,
            'tstamp':tstamp,
            'tzinfo':tzinfo}

gpx_data_interp = gpx_interpolate(gpx_data, res, deg)

where:
lat, lon and ele (optional) are the trackpoints latitude, longitude and elevation
tstamp (optional) is the trackpoints POSIX time
tzinfo (optional) is the timezone in datetime.tzinfo format (None for UTC)
res is the interpolation resolution in meters
deg is the interpolation in degree: 1 for linear interpolation (default) or 2-5 for spline interpolation

ele, tstamp and tzinfo are optional and can be set to None

Example

⚫ = input GPX data, 🔴 = interpolated GPX data

Requirements

gpxpy==1.4.2
scipy==1.5.4
numpy==1.19.4