GPS Data Visualization Script

Scripts to analyze GPS JSON data generated by gpsd and gpspipe and make plots of position changes and satellite visibility over time. This is a modern alternative for gpsprof.

Sample output

gpsjsonplot-pos.py
gpsjsonplot-sats.py

Prerequisites

• gpsd up and running; gpspipe or other source of json data
• Python 3.x with python packages: json, matplotlib, numpy, seaborn

Usage

# get some samples from gpsd
gpspipe -v -w -n 10 > input.json

# make a plot of position changes using 100 data points with contour lines
python gpsjsonplot-pos.py --json  input.json --outfile plot-lat-lon.png --n 100 --contour 4

# the same but for all data points and without contours lines
python gpsjsonplot-pos.py --json  input.json --outfile plot-lat-lon2.png --n 1 --contour 0

# plot satellites, with sampling 10 data points
python gpsjsonplot-sats.py --json input.json --outfile plot-sattelites.png --n 10

# plot satellites, all data points
python gpsjsonplot-sats.py --json input.json --outfile plot-sattelites2.png --n 0

• --json: Path to the input JSON file containing GPS data.
• --outfile: Path to the output image file where the plot will be saved.
• --n: Optional parameter to uniformly select n data points.
• --contour: Optional: number of contour lines. 0 - disables it.