[aprssig] Appalachian Trail Tracking

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Tue Feb 28 09:11:27 CST 2012

Altnets don't work with Mic-E transmissions.  Can't put two pegs in the 
same hole.

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

On 2/28/2012 10:00 AM, Andrew P. wrote:
> Looks like it's time to add polygon filtering. Just draw a polygon around the line you specify or make a polygon enclosing a selected line and bingo! Filter only on position reports inside the polygon. Distance to line would work too, but might be more computationally intensive.
> I'll see about adding that feature to YAAC.
> On the other hand, couldn't the Appalachian Trail just use an AltNet? Easy to filter on that.
> Andrew Pavlin, KA2DDO
> Sent from my Verizon Wireless BlackBerry
> -----Original Message-----
> From: "Lynn W. Deffenbaugh (Mr)"<ldeffenb at homeside.to>
> Date: Mon, 27 Feb 2012 21:27:53
> To:<aprssig at tapr.org>
> Subject: Re: [aprssig] Appalachian Trail Tracking
> On 2/27/2012 4:13 PM, Bob Bruninga wrote:
>> Can you or Hessu think of a way to aggregate all this data into one 2000
>> mile long string of data?  Or do we just collect callsign reports and then
>> wait till we have enough data and then manually connect them?
> I've been playing around with OpenStreetMap data recently and they seem
> to have the Appalachian Trail in as a way of connected nodes.  It'd be
> really neat if there was an easy way to detect an APRS position report
> close to this line to get an automated way of collecting points, but I'm
> not that good with geo-relations in PostGreSQL (yet).  So for now, the
> only thing I would know is to manually collect and connect reports as
> submitted by the hikers using callsign and date/time range.
>> Even if we came up with a clever SYMBOL or other flag to indicate the AT,
>> the chances are that some will forget it and do it wrong, so we will end up
>> having to manually connect the data anyway.
> Yeah, that's probably not even worth asking them to do, IMHO.  We'll get
> more people telling us when they were there than we would people getting
> the symbol right.
>> So unless you have a clever idea, Im just going to ask everyone to REPORT
>> their DATES and TIMES and CALLSIGN when they were actually on the trail and
>> we can aggregate it later?
> That's a good start.  If we have that information, we can always do it
> the hard way.  If we miss capturing that data, we might miss our last
> chance to get what you're after.
>> How long is data retention in your data base of Hessu's before we have to be
>> sure to capture the data?
> My DB is limited to 5 days (sufficient for my purposes), but I store all
> raw packets forever (for now), so I could go back and resurrect paths if
> necessary.  But I believe Hessu keeps posits in his DB for a LOT longer
> than my 5 days and has some good queriability to boot.
>> We will ask all hikers to use a 2 minute rate while hiking unless they are
>> running Proportional Pathing, then a 1 minute rate is the same thing.
> Did AL0I-7 do one of your "destination" posits earlier today?  If not,
> then he's backtracking for some reason today.  Hopefullly the following
> screen cap will come through.  His first posit was to the SW, then he
> jumped to the NE and is now working his way back.  Last posit was 1.75
> hours ago.
> Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

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