Last night I finished implementing APRS igate and digipeater coverage maps. They come in two flavors (examples from the San Francisco area):
- A 'heard directly' map: http://aprs.fi/heard/W6YX-5, showing packets which have been (supposedly) heard first by the given igate or APRS digipeater. This map can occasionally show some extra coverage if there are digipeaters with no callsign prepending in the area, but I'm trying my best to catch those. If there is good direct receive coverage by one more igates, those will "eat away" the displayed coverage of the digipeaters in the same area, since the digipeated packets will be filtered as duplicates on the APRS-IS.
- A 'passed packets to the Internet' map: http://aprs.fi/gated/W6DTW. This display shows packets which have been gated to the APRS-IS by the selected igate. This gives a rough idea of the service area of the igate, together with the surrounding digipeaters.
The statistics are currently calculated over the last 48 hours. Links to these are only on the info pages (if applicable), but I'll try to add them in the info balloons on the map. The data was already in the database, I just had to add a single index and implement the user interface. As usual, there are a few new strings to be translated.
The 'heard' map could be useful for fine-tuning the PHG information transmitted by a digipeater.