[Xastir] APRS with non APRS equiped stations ?

[Wes Johnston]

Just thinking aloud.... if you were to have a text file that contained one line
per 100 feet of $GPGGA data (or other lat/lon data), then your tracking program
would would simply have to lookup the correct line inthe text file.  It is
entirely possible to set a GPS to record points based on distance.  All the
program needs to do (note how I say that as if I could actually write it!!) is
calc distance traveled based on time and then divide by 100 feet, fetch that
line from the file and display the object at that point.  Easy eh?

Heck that would even work for laps around the same course.... just drive the
course with your GPS ahead of time and transfer the bread crumb trail points to
the text file.

Something I do know how to write would be a program that would take arbitrary
points from a GPS $GPxxx file, interpolate between the points and output the
lat/lon of each 100 foot marker.  Then the recorded data density wouldn't
matter... record at any time or distance interval and my program (which has not
been written) would output a text file with markers every XX feet.

Wes
--



Quoting James Ewen <jewen at shaw.ca>:

>
> > 1. Generate a list of places along the planned route where
> > each HAM should notify Net control via voice when they pass
> > these places.
> > 2. Have a list of callsigns for the participants and their
> > associated tactical callsigns (i.e., LEAD, AMBUL, TAIL, SAG1, etc).
> >
> > Given the above, it should be relatively easy to write a
> > program that will take the callsign (real or tactical), their
> > associated waypoint and update Xastir (via the server port?).
> >
> > Has anyone done anything like this?
>
> This is a project that is near and dear to my heart...
>
> It is very difficult to determine the lead runner/cyclist/swimmer/etc. of a
> race before the race starts. It is also difficult to try and get a top
> competitive athlete to carry a tracker with them.
>
> One thing that can be determined ahead of time is the approximate speed of
> your lead runner. Bob Bruninga discusses the concept well in this document.
> http://www.aprs.net/vm/DOS/MARATHON.HTM
>
> Bob's implementation doesn't have the resolution that I'd like, and if I
> remember correctly, you have to pay extra for the option.
>
> M0CYP Andy Pritchard has an add-on for UI-View called UI-Waypoint. It allows
> you to enter a number of predetermined waypoints, and will play them back at
> a preset time.
>
> It is free, but doesn't quite fit my bill either. I asked last year about
> making some changes to it, but got no response. I am thinking of asking
> again. I am currently working with Andy on his UI-Path program. We've been
> adding a bunch of new features to it, making the webpages generated a whole
> bunch different, with more information available. He's really responsive to
> input. We're just about done with all the updates I can think of. I'm going
> to see if I can redirect him to UI-Waypoint and add the features I want.
>
> I would like to be able to give it a detailed track of the course to be
> followed... i.e. feed it a gps track, and give it a speed at which to follow
> the course. One thing that is nice is that you can grab the object, and drop
> it onto the track, and it will simply continue on from there at the
> appropriate speed. This means when you get a manual report of the location
> of the first runner on the voice net, you can move the runner object to that
> location to make it coincide with the voice report.
>
> With the speed set properly, the object following the path will be pretty
> close to the real location. You can answer the query, "Where's the lead
> runner" with a good deal of accuracy.
>
> Launching multiple objects at different speeds can let you track lead
> female, pack, and sweep objects as well.
>
> Anyone have anything like that for Xastir yet? Once I get this dbfawk
> figured out, Xastir is moving to the top of my favourite APRS client list! I
> don't want to have to run multiple programs to get all the features needed!
>
> James
> VE6SRV
>
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