Packet Lines Display Clarification

[Andy KD0TQT]

I'm sing the packet lines on aprs.fi to inspect local traffic and see which local digis and igates handle traffic from different parts of town and I notice behavior I can't understand.  Specifically, many track points don't display any packet lines at all when you hold the cursor over them and I'm trying to determine if that is significant or not.  i.e. does it only show paths for 1 hop or less or what?  I have noticed this from mobile stations that have no TCPIP connection and do show rf paths for points before and after the 'non-line-drawing' points.

Thanks a lot,

Andy

[Heikki Hannikainen]

Hi,

If callsigns are referred in the path, and positions for those callsigns
are known, and those referred stations are drawn on the map, the lines
should be drawn. Also, if you are tracking a station, the igates/digis
referred in the path should be loaded even if they are far outside the map
view.

Could you provide examples (callsigns + time stamps, or screen shots) -
where it is occurring exactly? It's easier to investigate if there is
something concrete to work with.

- Hessu

[Andy KD0TQT]

Hessu,

As an example, I'm presently watching KG6CNL-2 (12:15 Mountain time 10/17/2016) around my home station and some of the points to the north of my station for his path are not showing any lines but they do show as positions on .fi.

Browser=Chrome under win10

Thanks a lot!

[Heikki Hannikainen]

Hi,

Can you say which points exactly, at what UTC time (click on the point to
get the balloon open)? I have no idea what mountain time is, we have no
mountains in Finland unfortunately. :)

I opened this URL, zoomed out a bit, and at least for me, with Chrome on
Mac, all of the points do draw a path line.

http://aprs.fi/#!call=a%2FKG6CNL-2&timerange=3600&tail=3600



On Mon, 17 Oct 2016, Andy KD0TQT wrote:

> Hessu,As an example, I'm presently watching KG6CNL-2 (12:15 Mountain time 10/17/2016) around my home station and some of the points to the north of my station for his path
> are not showing any lines but they do show as positions on .fi.Browser=Chrome under win10

>
> Thanks a lot!
>
> On Saturday, October 15, 2016 at 2:17:04 AM UTC-6, Heikki Hannikainen wrote:
> On Thu, 13 Oct 2016, Andy KD0TQT wrote:
>
> > I'm sing the packet lines on aprs.fi to inspect local traffic and see
> > which local digis and igates handle traffic from different parts of town
> > and I notice behavior I can't understand.  Specifically, many track
> > points don't display any packet lines at all when you hold the cursor
> > over them and I'm trying to determine if that is significant or not.
> >  i.e. does it only show paths for 1 hop or less or what?  I have noticed
> > this from mobile stations that have no TCPIP connection and do show rf
> > paths for points before and after the 'non-line-drawing' points.
>
> Hi,
>
> If callsigns are referred in the path, and positions for those callsigns
> are known, and those referred stations are drawn on the map, the lines
> should be drawn. Also, if you are tracking a station, the igates/digis
> referred in the path should be loaded even if they are far outside the map
> view.
>
> Could you provide examples (callsigns + time stamps, or screen shots) -
> where it is occurring exactly? It's easier to investigate if there is
> something concrete to work with.
>
>    - Hessu
>

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- Hessu

[Andy KD0TQT]

2016-10-17 12:36:33 is the time stamp from a bubble in your linked view that behaves intermittently for me. You should get some mountains, they're great, otherwise UTC-7.

What I just noticed is that in the linked view you sent every point behaves as you describe, however when I display the same view but without specifying a call sign then sometimes that point will draw the line and sometimes it will not.  Similarly, sometimes that bubble has the info and other times it displays a nearly empty bubble.  Now it seems that it may be a delay in displaying full data when many stations are displayed but works well for a single call-sign filtered window.  Does that make sense?

Thanks a lot for all you do.