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ZL3AI > APRDIG 14.03.07 01:02l 232 Lines 8176 Bytes #999 (0) @ WW
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From: ZL3AI@ZL2BAU.#79.NZL.OC
To : APRDIG@WW
Message: 28
Date: Thu, 01 Mar 2007 01:13:06 -0800
From: "Stephen H. Smith" <wa8lmf2_at_aol.com>
Subject: [aprssig] All APRS Digipeaters In The World (Almost!) Mapped On
UIview
APRS Digipeaters WorldWide Mapped On UIview
APRS digipeater maps for the World, Europe, North America, Australia/New
Zealand and other areas.
This project started when I responded to a query on the California APRS
mailing list about digipeater coverage in California. I decided to map JUST
digipeaters using the user-defined APRS filter port #14580. I then
realized I was just filtering by symbol, with no distance limit and was
thus collecting posits for every digi in the world. A day later, this set
of maps was the result. The plots on the maps below should reflect every
digipeater in the world that was reaching an Internet gateway on February
28th, 2007 (that was using the correct digi star symbol).
These maps were generated by monitoring the world-wide APRS Internet system
data stream with the port 14580 filter port setting of "filter s/#/#"
This selects ALL position reports using the digipeater star symbol. This
includes both the star in the primary symbol set with the fixed letter D in
it, and the the star in the secondary set which can be overlaid with a
single letter or number to indicate the type of digipeater. The positions
were plotted on UIview32 using Precision Mapping 8.0.
Precision Mapping only shows road data, and detailed local boundaries
(states, provinces, counties, districts, etc) in Canada and the United
States. However, it will plot positions for the rest of the world on a
simple outline map of national boundaries that is fully scrollable and
zoomable, just like the detailed maps in North America.
UIview was set to expire symbols after 20 hours, and then connected to the
APRS Internet system for about 10 hours. The plots on the maps below
should reflect every digipeater in the world that was reaching an Internet
gateway on February 28th, 2007.
* World Map (64K) UIview/Precision Mapping zoomed out to it's
widest view.
In Europe, North America and Australia/New Zealand, the digipeater
density was so great that I zoomed in for the closer views below.
* Europe - Single Screen. (82K) This single 1440x900 pixel screen
is still not large enough to separate individual stations.
* Europe - Enlarged. (270K) This is a composite of 8 screen shots
in two columns/four rows, zoomed in far closer for a more detailed
view. Much more scrolling is required to view the entire extent of
this map.
* Austrailia & New Zealand (19K) Single 1440x900 pixel screen capture.
* Japan (43K) Two screen captures in one vertical column. Again you may
have to scroll to the right and down to see Japan instead of the
north-eastern Asian mainland (Russia, China, North Korea) when you first
open this page.
* Central America/Carribbean (38K) One 1440x900 pixel screen.
* United States & Canada - Single Screen (116K) Small (single screen)
view is an unreadable mess with thousands of digipeaters on top of each
other. Note that the view extends over 500 miles north of the US-Canada
border into the Canadian interior.
* United States & Canada - Enlarged (561K) Large View. Composite of 4
rows x 4 columns with far more details. Still major coastal areas are too
dense to see clearly. SCROLL - SCROLL - SCROLL !
* U.S NorthEast & Atlantic Coast (327K) from New England to North Carolina
* Pacific Northwest (168K) US and Canada including
Seattle/Vancouver/Puget Sound area.
* California & Nevada (156K) All of California and Nevada one column of
three 1440x900 screen captures.
--
Stephen H. Smith wa8lmf (at) aol.com
EchoLink Node: 14400 [Think bottom of the 2M band]
Home Page: http://wa8lmf.com --OR-- http://wa8lmf.net
NEW! TNC Test CD
http://wa8lmf.net/TNCtest
JavAPRS Filter Port 14580 Guide
http://wa8lmf.net/aprs/JAVaprsFilters.htm
"APRS 101" Explanation of APRS Path Selection & Digipeating
http://wa8lmf.net/DigiPaths
Updated "Rev G" APRS http://wa8lmf.net/aprs
Symbols Set for UI-View,
UIpoint and APRSplus:
------------------------------
Message: 29
Date: Thu, 1 Mar 2007 07:48:47 -0500
From: "Robert Bruninga" <bruninga_at_usna.edu>
Subject: RE: [aprssig] All APRS Digipeaters In The World (Almost!)
Mapped OnUIview
>APRS Digipeaters WorldWide Mapped On UIview
>
>< http://wa8lmf.net/APRSmaps >
Fantastic effort!
But without plotting the PHG circle, just seeing green stars says nothing
about the network or communication coverage. A digi with a height of 5000
feet HAAT covers 10,000 times more area than a digi at 50 feet. And there
are a lot of 50' digis.
Can you add PHG circles to these plots? Then it is easy to see the
valuable digipeaters versus the fill-ins. I think there is an add-on to
Uiview for plotting this fundamental APRS PHG data.
Besides where your station is, there is no other single most important
parameter to VHF communications than antenna height. This was fundamental
to APRS, and should not have been left out of Uiview.
Bob, WB4APR
------------------------------
Message: 30
Date: Thu, 01 Mar 2007 15:22:03 +0000
From: wyattfoard_at_comcast.net (Wyatt Foard)
Subject: [aprssig] $45 GPS on Woot
Just thought I'd pass along that today's Woot is Microsoft Streets and
Trips 2006 which includes what appears to be a USB NMEA output GPS for
[commercial content deleted]
------------------------------
Message: 31
Date: Thu, 1 Mar 2007 10:24:47 -0600
From: "Ken Cechura" <kc9umr_at_freqradio.com>
Subject: RE: [aprssig] Barcodes, D7 msgs and APRStt
Yes, I suppose that is the case.... I basically want to focus on using
equipment that people might already have laying around or is not oo terribly
expensive (TNC's TT's OT's, etc.)
-----Original Message-----
>From: aprssig-bounces_at_lists.tapr.org
[mailto:aprssig-bounces_at_lists.tapr.org]
>On Behalf Of A.J. Farmer (AJ3U)
>Sent: Wednesday, February 28, 2007 5:21 PM
>To: TAPR APRS Mailing List
>Subject: Re: [aprssig] Barcodes, D7 msgs and APRStt
>
>On 2/28/07, Jack Chomley <radio_at_dodo.com.au> wrote:
>>Personally, I thought good old packet radio would be the answer :-)
>
>Yes, I am with you. I was responding to KC9UMR's comment that he wanted to
>track everything *without* the use of a D7, D700, or any other "specialized
>equipment". To me, "specialized equipment" pretty much rules out packet all
>together. :-)
>
>--
>A.J. Farmer, AJ3U
>http://www.aj3u.com
------------------------------
Message: 32
Date: Thu, 01 Mar 2007 09:17:18 -0800
From: "Stephen H. Smith" <wa8lmf2_at_aol.com>
Subject: Re: [aprssig] $45 GPS on Woot
The included GPS is the mediocre-performing Pharos iGPS-180 private-labeled
by Microsoft. It is by far the worst-performing of the half-dozen GPS
devices I own. You are much better off with a Globalsat, Deluo or Garmin
GPS-18.
--
Stephen H. Smith wa8lmf (at) aol.com
EchoLink Node: 14400 [Think bottom of the 2M band]
Home Page: http://wa8lmf.com --OR-- http://wa8lmf.net
NEW! TNC Test CD
http://wa8lmf.net/TNCtest
JavAPRS Filter Port 14580 Guide
http://wa8lmf.net/aprs/JAVaprsFilters.htm
"APRS 101" Explanation of APRS Path Selection & Digipeating
http://wa8lmf.net/DigiPaths
Updated "Rev G" APRS http://wa8lmf.net/aprs
Symbols Set for UI-View,
UIpoint and APRSplus:
------------------------------
Message: 33
Date: Thu, 1 Mar 2007 12:54:18 -0500
From: "Bob" <k8ys_at_fuse.net>
Subject: RE: [aprssig] $45 GPS on Woot
WHOA!! I happen to have the Pharos version that was bundled with my Axim
and it out performs my Garmin GPS2+ and my older GPSs...
I guess that I've been away from GPS technology far too long.
Bob K8YS
>The included GPS is the mediocre-performing Pharos iGPS-180
>private-labeled by Microsoft. It is by far the worst-performing of the
>half-dozen GPS devices I own. You are much better off with a Globalsat,
>Deluo or Garmin GPS-18.
------------------------------
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