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ZL3AI > APRDIG 26.05.04 08:48l 237 Lines 9051 Bytes #999 (0) @ WW
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Subj: TAPR Digest, May 24, 2/4
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: RE: APRS Gas prices
From: "Laurie - g6isy" <g6isy@dsl.pipex.com>
Date: Mon, 24 May 2004 16:47:55 +0100
X-Message-Number: 12
Scott Miller wrote:
>That's easy... it'd be about 1,500 miles due East of here. Nothing
>under $2.39 in these parts.
At current exchange rates, nothing below $6.67 near me
--
73 Laurie - G6ISY
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Subject: Re: APRS Gas prices
From: "Mikael Eriksson" <mikael.eriksson@mbox301.swipnet.se>
Date: Mon, 24 May 2004 17:58:25 +0200
X-Message-Number: 13
I don't want to be picky, but should one transmit at a gas station. Isn't
there a risk of sparks? :-)
/Micke
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Subject: APRSdos Traffic Speed Posts
From: "Robert Bruninga" <bruninga@usna.edu>
Date: Mon, 24 May 2004 12:07:31 -0400
X-Message-Number: 14
From the beginning, APRS has had a SIGN-POST symbol which displays the
speed of traffic past a point on the highway. The problem has been, how to
get the speed data. I solved that this weekend...
On APRSdos the SPEED POST symbol looks like a highway sign with just the
SPEED on it. On A Kenwood TH-D7 it will look like this on the 3 screens:
1:50W-Bowie <== location of Speed Post
{55} MPH <== shows the speed
Time 0830 <== and when it was valid (local time)
1:50W-Bowie
FM07JW
\m 1.6 mi --> <==shows direction and distance from you
1:50W-Bowie
cse214 s055 <== Shows actual heading of probe
fm:W3ADO <== Shows callsign of the probe vehicle
Since no one has come up with an easy method (although State-run speed
information is availablle all over the internet), I finally found a few
moments to add a PROBE system to a special version of APRSdos that will
generate these SPEED POSTS for an area. (Actually, it has been in APRStt
and will SPEAK the speed past a sign post on your local VOICE repeater, but
APRStt just has not caught on...)
All it does is watch all APRS mobiles and whenever any one of them passes
by one of these "Speed posts" objects, APRStfc grabs his speed and puts it
on the post and then sends it to everyone else in the immediate area. Using
the usual APRSdos decaying algorithm, this info is quickly distributed to
other commuters nearby but also quickly fades from the channel...
Only one person in a city needs to run APRStfc.EXE to benefit all the
commuters in the area. And the locations file for all the
speed-checkpoints is simply a point-and click method to build it.
This is a BETA test only for users already familiar with APRS864 (or other
recent versions). Download TRAFFIC.ZIP if you want to experiment. But,
D7 and D700 users can watch and see if they see any of these posts...
You get 3 files to add to your existing APRSdos:
APRStfc.exe (identical to 864 but without NTS and FADE DFing)
TRAFFIC.HST to put in your HSTS directory <my area file>
TRAFFIC.ORG a back up copy of my original
TRAFFIC.TXT fo put in your README directory and READ
To see where all my SPEED-POSTS are, do a MAPS-OVERLAY-TRAFFIC command and
zoom into maryland...
de Wb4APR, Bob
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Subject: Re: APRS Gas prices
From: "Richard Amirault" <ramirault@erols.com>
Date: Mon, 24 May 2004 12:19:44 -0400
X-Message-Number: 15
----- Original Message -----
From: "Bill Herrmann"
Subject: [aprssig] Re: APRS Gas prices
>>Simply go to the MENU and temproarily change your
>>call to 186GAS. Then send out a few posits
>>and then change it back.
>
>Wouldn't GAS186 be better? That way those that have the ability to filter
>could look for all the GAS* objects. (and I wish I could find it for
>$1.86)
Yes, and for those of us who don't have laptops in the car .. but do have a
GPS that downloads posits as waypoints .. then all the GAS waypoints will be
grouped together on the waypoint list and easy to compare distance & price
..... except that duplicate prices will overwrite...and we'll have to check
the date received since gas prices can jump considerably and a few days or a
week ... maybe it's not such a great idea after all??
Richard N1JDU
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Subject: Re: APRSdos Traffic Speed Posts
From: wes@johnston.net
Date: Mon, 24 May 2004 13:16:25 -0400 (EDT)
X-Message-Number: 16
On Mon, 24 May 2004 12:07:31 -0400, "Robert Bruninga" wrote:
>on your local VOICE repeater, but APRStt just has not
>caught on...)
Bob, APRStt never caught on (unless there's been a change) b/c it would
only use your callsign. I couldn't run it on the air at my house legally.
>All it does is watch all APRS mobiles and whenever any
>one of them passes by one of these "Speed posts"
>objects, APRStfc grabs his speed and puts it on the post
>and then sends it to everyone else in the immediate area.
Is there a way to count cars? Has anyone come up with a traffic counter?
Sure would be cool to count the number of cars past a spot and publish
every XX minutes - like a WX station sending periodic wind speed info. I've
given some thought to using a laser aimed at the center reflector on the
street infront of my house and counting the pulses for one lane.... and
putting a reflector on the guys fence across the street to catch both
lanes. Subtract the readings and you get the number of cars in each
direction. But I guess my question is more along the lines of has anyone
done this? As the only APRS user who runs the streets I do on teh way to
work, publishing the speed as I pass a mile marker does *me* no good. I'd
like to be able to see the traffic speed and density ahead based on other
cars.
I keep coming up with uses for that darned pocket tracker w/ 200mw
transmitter... a solar powered "disposable" (ie, who cares if it is stolen
or vandalized) traffic monitor.
ham callsign: kd4rdb
find me: http://wesvan.zapto.org
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Subject: Re: APRSdos Traffic Speed Posts
From: "Scott Miller" <scott@opentrac.org>
Date: Mon, 24 May 2004 10:24:23 -0700
X-Message-Number: 17
>Is there a way to count cars? Has anyone come up with a traffic counter? Sure
>would be cool to count the number of cars past a spot and publish every XX
>minutes - like a WX station sending periodic wind speed info. I've given some
I was thinking about something like this for hiking trails. For SAR
purposes, it'd be nice to have timestamps for sensors placed at key
locations along a trail.
Scott
N1VG
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Subject: Re: APRS Gas prices
From: "Curt, WE7U" <archer@eskimo.com>
Date: Mon, 24 May 2004 10:32:03 -0700 (PDT)
X-Message-Number: 18
On Mon, 24 May 2004, Richard Amirault wrote:
>Yes, and for those of us who don't have laptops in the car .. but do have a
>GPS that downloads posits as waypoints .. then all the GAS waypoints will be
>grouped together on the waypoint list and easy to compare distance & price
>.... except that duplicate prices will overwrite...and we'll have to check
>the date received since gas prices can jump considerably and a few days or a
>week ... maybe it's not such a great idea after all??
With the method that Bob described, where you temporarily change your
callsign to "186gas", then you'd only send out a posit or two with that
callsign and then there'd be no more. You wouldn't have a bunch of them
collecting over days unless your APRS radio/program didn't delete things
that hadn't been heard in a while.
What would be more annoying is all the objecs on the internet with the same
name that would cause tracklines to get drawn over the U.S. (or the world)
as different people use the same object name/callsign.
While mobile, where this has the most utility (I seldom buy gas for my
house!), the trackline thing will be less of an issue.
--
Curt, WE7U http://www.eskimo.com/~archer
"Lotto: A tax on people who are bad at math." -- unknown
"Windows: Microsoft's tax on computer illiterates." -- WE7U
"The world DOES revolve around me: I picked the coordinate system!"
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Subject: Re: APRSdos Traffic Speed Posts
From: "Jason Rausch" <ke4nyv@hamhud.net>
Date: Mon, 24 May 2004 13:14:14
X-Message-Number: 19
The Wes Meister said:
>Bob, APRStt never caught on (unless there's been a change) b/c it would
>only use
>your callsign. I couldn't run it on the air at my house legally.
Same problem here. I loved the APRStt idea, I built up Wes's interface to
play, but never could because of the WB4APR call bug. I even have a
windows based program I wrote in VB6 to convert your call in DTMF, full and
hashed versions. www.ke4nyv.com/software.htm
And this was all after just seeing it at Dayton two years ago.
Jason KE4NYV
www.ke4nyv.com
RPC Electronics
www.ke4nyv.com/rpc
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