server url: http://tracker.dxpedition.net/
coverage of nextel at our LZ
This project does all that we need (is a client-side Java app that fires up Google Earth and tracks a callsign, but it seems a bit overkill): https://aprskml.dev.java.net/
Here's a server that serves up KML files given a callsign: http://www.openaprs.net/index.html
Need to setup the correct filter call but it exports KML files and provides historic tracking.
Generates a correct KML view given a call sign: http://www.aprsdepot.com/forum/index.php/topic,34.0.html
They can follow a call sign in real time already: http://www.aprsdepot.com/forum/index.php/topic,40.0.html
Another site that follows a call sign in realtime: http://db.aprsworld.net/datamart/track-search.php
TimL has updated ahab_location_google_earth.php to include blocks of the following code, which use the openaprs.net server to get APRS location data:
<NetworkLink>
<Url>
<refreshInterval>300</refreshInterval>
<refreshMode>onInterval</refreshMode>
<href><![CDATA[http://www.openaprs.net/ajax/google_earth/track.php?source=K7MCR&interval=&refresh=true]]></href>
</Url>
<visibility>1</visibility>
<name>OpenAPRS:Some guy in Issaquah K7MCR</name>
</NetworkLink>
<NetworkLink>
<Url>
<refreshInterval>300</refreshInterval>
<refreshMode>onInterval</refreshMode>
<href><![CDATA[http://www.openaprs.net/ajax/google_earth/track.php?source=KE7GRE&interval=&refresh=true]]></href>
</Url>
<visibility>1</visibility>
<name>OpenAPRS:Bre KE7GRE</name>
</NetworkLink>
We should create a system which reads APRS data from the internet somewhere, and then outputs KML (or ideally KMZ) files to feed users of google earth.
Someone created a demo of this here:
http://www.w7mjr.com:81/aprs/keyhole.shtml
http://www.aprs-is.net/javAPRSSrvr/serveradjunct.htm
http://mologogo.wikispaces.com/KML
This is an awesome demo, however, it has some issues..
- The dataset for the entire APRS network is large; the xml file is almost 2 megs.
- It looks like W7MJR is hosting this from a dsl line.
- His updates are every 2 minutes or so.
- It clearly can't support more than a few clients.
So we should re-create this demo using a subset of the entire APRS feed, with a whitelist of valid callsigns. Also, we can have it feed in stuff from mologogo phones.
Here's the XML file from the kml file:
com.w7mjr.aprs
APRS data received at station W7MJR
1
http://www.w7mjr.com:81/aprs/aprskeyhole.cfm/aprs.kml
120
0
It seems to have a pretty simple interface. This frontend kml file tells google earth to fetch new data from X url every 120 seconds.
the aprs.kml (snipped) uses this format:
Stations heard at W7MJR. Last update 24-Feb-07 18:22:48 UTC.
scription>
APRS - Boise, Idaho USA
1
147.04
testing
-112.2085
41.014503
30000
0
0.0
1
-112.2085,41.014503,
YV6EVC
>
testing
-64.463333
9.4316673
30000
0
0.0
1
-64.463333,9.4316673,
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