[Xastir] More info - xastir v. gpsd / direct

[Troy M Campbell]

I'm just a perl guy so I may be WAY off base here.  If so, just tell me go away.

I've written parsers for GPRMC and GPGGA sentences in perl on the
basic stamp (yuck) .

in perl, its just  

@fields = split /,/, $string

Then go to the correct field(s)  and use sprintf  to format it the way I want.

Is it that much more difficult in c++  ?

Again, I speak from ignorance.


Troy M. Campbell

www.capnspace.org

------ Original Message ------
From: Andrew Rich <vk4tec at tech-software.net>
Date: Friday, May 20th, 2005 10:53 AM CDT
To: "Curt Mills, WE7U" <archer at eskimo.com>, "Richard E. Polivka" <r.polivka at sbcglobal.net>
Subject: RE: [Xastir] More info - xastir v. gpsd / direct

I have certainly seen different date/time standards in GPRMC between GPS

I am disappointed if they have started to play with lat/lon

Thats the bit you want to remain static as far as number of chars

-----Original Message-----
From: xastir-bounces at xastir.org [mailto:xastir-bounces at xastir.org]On
Behalf Of Curt, WE7U
Sent: Saturday, 21 May 2005 12:19 AM
To: Richard E. Polivka
Cc: xastir at xastir.org
Subject: Re: [Xastir] More info - xastir v. gpsd / direct


On Fri, 20 May 2005, Richard E. Polivka wrote:

> We may have a winner here - at least a good solid comparison.
>
> This is a sentence from decode_gps_gga with data from gpsd:
> $GPGGA,110413,4301.1515,N,8803.0402,W,3,05,6.80,230.6,M,-34.460,M,,*7B
>
> This is a sentence from decode_gps_gga with data direct from
> /dev/ttyUSB0 w/o gpsd:
>
$GPGGA,003501.903,4301.1474,N,08803.0363,W,1,04,1.9,204.4,M,-34.2,M,0.0,0000
*4E
>
> gpsd is breaking my location. I still indicate 180 W. My previous post
> was in error for I forgot
> to restart xastir after changing sources and making sure that gpsd is
> unloaded when not using it.

Until recently I had not seen a GPS that didn't do 4 digits before
the decimal for lat, 5 digits for long.  After some of your postings
I went looking for others and found some that didn't zero-fill to
4/5 digits, and one that did 5 digits for both.  The latest Xastir
CVS code fixes most of these, so it fixes problems you haven't come
across yet.

I don't think I fixed the 5 digits for both problem though.  That
one may have been a typo in the GPS receiver spec I was reading.  It
just seems too weird.

--
Curt, WE7U.   APRS Client Comparisons: 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!"
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