APRS MAPS

This is simple visualisation system for your APRS frames.

It is based on 2 tools :

• a script which is converting the APRS frames into a JSON format
• a webpage using OpenStreetMap to draw all the frames

Frame conversion script

Pre-requirements

Two python packages are required

pip install beautifulsoup4
pip install aprslib

Usage

The usage is fairly simple. Write all frames in a file called file_to_parse.txt and following this format

2022-07-16 11:19:29 CEST: F4IHA>APFD01,F6KBN-3*,F8KGI-3*,F1ZYG-3*,qAR,F4VQS-3:!4707.30N/00025.49E>106/008/A=000118/V=5.12 HDOP=0
2022-07-16 13:40:17 CEST: F4IHA>APFD01,F6KBN-3*,F8KGI-3*,F1ZYG-3*,qAR,F4VQS-3:!4656.25N/00018.47E>197/033/A=000346/V=5.12 HDOP=0

Then run the Python script

python3 convert.py

An output will provide all the details. The script will parse the file_to_parse.txt, extract the useful informations which will be write in json files (frames are grouped in a json file by day) and then archives into the archives folder with the date as filename.

NB: the script is parsing the HTML of aprs.fi to retrieve the GPS coordinates of a unknow relay.

Webpage with the maps

Usage

A simple way is to start a webserver with python. Any other HTTP webserver could be used.

python -m http.server

Then, open a browser to this address http://localhost:8000. It is centered around Lyon in France, but you can change the location by updating this line with your GPS coordinates.

var carte = L.map('maCarte').setView([45.764043, 4.835659], 9);

On the top right, there is a dropdown menu which is providing multiple dates. Select one of them and you will see all frames appearing. If you go over a red line will appear between the location and the relay which receive the frame. You can see also on the right in a box the distance between these 2 points.

You can clear the map of all red lines with the Clear map button. Selecting another day will clean also the maps from any frames and lines.