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

Michael Carey michaelcarey at internode.on.net
Thu Mar 1 15:40:16 EST 2007

Great job.
I see my digipeater in there, but with a truncated callsign. It might be 
accidental, but most likely due to the full text overwriting some other 
digi's to my east. Look on the Australia and NZ image, on the south 
coast, mine is the last heading West before you get to the group on the 
Western coast near Perth. The text is "VK5R", the full call is "VK5RPL-1".
Was my callsign intentionally altered?? (-: Maybe under some pressure 
from the big boys in Adelaide?  Just kidding.

Stephen H. Smith wrote:
> 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).
>     < 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
>      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:
> _______________________________________________
> aprssig mailing list
> aprssig at lists.tapr.org
> https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig

More information about the aprssig mailing list