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[aprssig] All APRS Digipeaters In The World (Almost!) Mapped On UIview

Stephen H. Smith wa8lmf2 at aol.com
Thu Mar 1 09:13:06 UTC 2007

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 

     < http://wa8lmf.net/APRSmaps >

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

    * 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

JavAPRS Filter Port 14580 Guide

"APRS 101"  Explanation of APRS Path Selection & Digipeating

Updated "Rev G" APRS            http://wa8lmf.net/aprs
Symbols Set for UI-View,
UIpoint and APRSplus:

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