[Xastir-dev] args to data_add()

[Brian D Heaton]

Gerry,

Oooohhhhh..... Very nice... Mirroring down as we speak.


			THX/BDH


On Sun, 2004-04-11 at 20:11, Gerry Creager N5JXS wrote:
> https://164.214.2.62/products/digitalaero/index.cfm
> 
> Brian D Heaton wrote:
> > Did I miss a link somewhere?
> > 	
> > 		THX/BDH
> > 
> > 
> > On Sat, 2004-04-10 at 13:49, Gerry Creager N5JXS wrote:
> > 
> >>OK, I've missed a few days with Mesonet business, so I'm catching up 
> >>slow... Did anyone else check out NIMA's DAFIF stuff?  It's got all the 
> >>shapefiles for the Sectionals and Low Altitude Enroute (OK, high alt, 
> >>too!) and approach info.
> >>
> >>gerry
> >>
> >>Owen DeLong wrote:
> >>
> >>>I, for one, think this would be amazingly cool!!!
> >>>
> >>>I hadn't heard of FlightGear until this, but, I'll definitely be 
> >>>checking it out.
> >>>I've been bemoaning the fact that there weren't any good non-windows flight
> >>>simulators available for some time now.
> >>>
> >>>Xastir could become a very cool moving map, and, recruiting that 
> >>>community into the
> >>>Xastir fold could bring in some developer resources that have expertise 
> >>>on things we
> >>>need (especially as we start looking at autorouting, more SAR features, 
> >>>etc.).
> >>>
> >>>
> >>>Owen
> >>>
> >>>
> >>>--On Friday, April 09, 2004 12:28:00 -0700 "Curt, WE7U" 
> >>><archer at eskimo.com> wrote:
> >>>
> >>>
> >>>>On Fri, 9 Apr 2004, Wendell Turner wrote:
> >>>>
> >>>>
> >>>>>What are the arguments to db.c:data_add() ?
> >>>>
> >>>>
> >>>>I'd have to go into the code to see, just like you'll have to.
> >>>>
> >>>>You can look for instances where data_add() gets called, and
> >>>>back-track to the types of parameters from there.
> >>>>
> >>>>Note that the lat/long values we use are in the Xastir coordinate
> >>>>system, they're not what you're used to.  The transformations
> >>>>between normal lat/long and our coordinates are very straightforward
> >>>>though, and we have several examples of that in the code.
> >>>>
> >>>>
> >>>>
> >>>>>If I want to place a (moving) target on the map, it looks like
> >>>>>type should be some indicator that says data will contain either
> >>>>>a gps sentence or some other lat/long/alt encoding.  Correct?
> >>>>
> >>>>
> >>>>If you just want to throw an object onto the screen, there's an
> >>>>easier way.  You can put a simulated APRS sentence right into our
> >>>>decoding and then tell Xastir that there's something there.  It will
> >>>>then go through the normal decoding routines and you won't have to
> >>>>do anything special.
> >>>>
> >>>>Look at the very end of interface.c:output_my_data().  You'll see
> >>>>this line:
> >>>>
> >>>>  decode_ax25_line( data_txt, DATA_VIA_LOCAL, port, 1);
> >>>>
> >>>>That will throw a text line right into the decoding logic.  The APRS
> >>>>specification is on www.tapr.org, which will help you to figure out
> >>>>the correct sort of APRS string.
> >>>>
> >>>>Depending on what accuracy you require, you might consider using
> >>>>APRS Compressed position reports, which give you higher resolution
> >>>>than normal DD MM.MM APRS posits, or perhaps use NMEA sentences with
> >>>>DD MM.MMM or DD MM.MMMM posits.
> >>>>
> >>>>
> >>>>
> >>>>>(Sorry, but I don't do radios, just aircraft.  However, now with
> >>>>>the ability to use FAA sectionals, it should be easy to use
> >>>>>xastir as a moving map display for the FlightGear
> >>>>>(www.flightgear.org) simulator.  Would the xastir community be
> >>>>>interested in those patches?)
> >>>>
> >>>>
> >>>>If it would serve a purpose and wouldn't interfere with what we're
> >>>>doing I don't see a big reason to reject it.  Some of the other
> >>>>developers may have a different opinion on it though.  I guess we'll
> >>>>see what other responses you get.
> >>>>
> >>>>-- 
> >>>>Curt, WE7U                archer at eskimo dot com
> >>>>Arlington, WA, USA        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!"
> >>>>_______________________________________________
> >>>>Xastir-dev mailing list
> >>>>Xastir-dev at xastir.org
> >>>>https://krypton.hscs.virginia.edu/mailman/listinfo/xastir-dev
> >>>
> >>>
> >>>
> >>>
> >>>
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