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[aprssig] Some obscure APRS client questions

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Sat Nov 12 13:43:27 UTC 2011


And while we're on the subject of .POS overlay files, there's a 
specification subtlety that says that the first line is a description of 
the file.  And also that a line starting with a * is a comment.  There 
is NO requirement that the first line start with a *, but since it is a 
"description of the file", APRSISCE/32 explicitly ignores it rather than 
try to parse someone's "description" as a valid packet spec.

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

PS.  Every existing .POS file I've found has a description as the first 
line.

On 11/12/2011 8:38 AM, Randy Love wrote:
>
> On Fri, Nov 11, 2011 at 2:03 PM, Stephen H. Smith <wa8lmf2 at aol.com 
> <mailto:wa8lmf2 at aol.com>> wrote:
>
>     On 11/11/2011 1:16 PM, Andrew P. wrote:
>
>         Greetings, all.
>
>
>
>
>         1. With a receive-only feed (radio or Internet), does it make
>         sense to allow the user to create or edit objects? They can't
>         send them to the public. Is there a need in general to be able
>         to create private objects/items in a local APRS client?
>
>
>     UIview handles these as a separate class of point objects called
>     "overlays" (not to be confused with the overlays possible in
>     Precision Mapping when used with UIview).
>
>     These "overlays" are contained in a text file with the extension
>     ".pos", that use the same format as over-the-air APRS position
>     report. However, they only show on your own screen and are not
>     transmitted.
>
>     They DO show in screen caps of the UIview map used with the
>     UIiview web server which is very useful.   For example when
>     tracking balloon launches on my UIwebserver, I will pin the launch
>     site and other nearby points of interest/reference as an "overlay"
>     on the map.
>
>     A typical "POS" file,  which can contain any number of points,
>     looks like this when opened in a text editor like Windows Notepad:
>
>     ** Overlay Objects for N1VG Balloon Launch
>     Launch!3524.78N/11757.90WO Launch Site
>     RedRocks!3520.71N/11758.25WJ Red Rocks Park
>     Baker!3515.90N/11604.48WJ City of Baker
>     JPL!3412.01N\11810.40Wo
>
>     Note that the same control codes for symbol/icon display, used in
>     over-the-air posits, works in these overlays.
>
> It should be noted that additional information can be saved for a 
> overlay object by using a status >  packet. For example:
> *NameIt :)!4240.50NX08300.00W?Main information here.- name up to 9 long
> *NameIt :)>use status for addition information, freq list, contact 
> info, etc.
> *
> *  *** Mid Michigan MS-150 Day 1 Rest Stops 2011
> *
> GAINES!4252.20N/08354.72W7Rest 1
> GAINES>Gaines Elementary School 300 Lansing St., Gaines
> BYRON!4249.46N/08356.93W6Rest 2
> BYRON>Byron High School 312 W Maple, Byron
> BANCROFT!4252.98N/08404.13W5Rest 3
> BANCROFT>Shiawassee Twp Fire Dept 625 E Grand River Rd, Bancroft
> LUNCH!4248.42N/08405.14W4Lunch for all riders
> LUNCH>Poe Residence 3745 E. Beard Rd. Morrice
> SHAFTBRG!4248.31N/08417.94W3Rest 5
> SHAFTBRG>Shaftsburg Elem. 7320 West Beard Rd., Perry
> WILLMSTON!4241.46N/08416.98W2Rest 6
> WILLMSTON>McCormick Park Putnam and High St, Williamston
> *
> UI-View and APRSISCE/32 both support the file in this format.
> Randy
> WF5X
>
>
>
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