From: John W Deakin <john.deakin@te...> - 2004-01-06 22:46:12
I hope you can help. I am a novice very much so when it comes to GPS but
I'm working on it.
This is my problem.
I have a Software Navigation package called Navmaster for sailing which I
find excellent and the developers very friendly.
I want to up load waypoints to my hand held Magellan Meridian Colour as a
As I have found from the kind people at Thales in France that the Magellan
Nmea protocol has a few extras in it.
While my Navmaster works in simple Nmea so it will not upload to the Magellan.
Navmaster at present works with the Garmin GPS units
Question 1 What precise information would you require to point me in the
right direction,(no pun intended!!)
Question 2 Would gpsbabel be the type of conversion utility I require?
The file extentions that Navmaster produce are *.dbf *.dbt and *.mdx
So the problem is that Navmaster does not create those unique Magellan
"strings" if that's what they are called?
I look forward to any comments
John W Deakin
From: Robert Lipe <robertlipe@us...> - 2004-01-06 23:11:16
John W Deakin wrote:
> While my Navmaster works in simple Nmea so it will not upload to the
"Simple NMEA", as I understand it, doesn't do waypoint transfers. :-(
Anyone that can convince me otherwise by providing the pertinent parts
of the NMEA specification to do it are encouraged to do so.
> Question 2 Would gpsbabel be the type of conversion utility I require?
It's the kind of thing we've done for about 4 dozen other formats, yes.
> The file extentions that Navmaster produce are *.dbf *.dbt and *.mdx
> So the problem is that Navmaster does not create those unique Magellan
> "strings" if that's what they are called?
None of those ring bells for me outside the context of dBase III from
the 80's and I've never heard of Navmaster. So you'll need to find out
whether it's some kind of ASCII file or some kind of binary file. The
former is easier.
Open one of each of those files in your favorite text editor. Can
you read any of them? Can you basically read them or are they filled
with glphyic nonsense? If you can read them, they're probably
some kind of ascii xsv mutant and we can help without much "real"
Failing that, you'll need detailed, byte-level description of those
file formats from the vendor or a masochistic programmer type
willing to reverse engineer them. One that's in hand, a programmer
will have to actually put his or her fingers on a keyboard to
implement it. Depending on how complicated the format is and how
well it's understood, that can range from trivial (15-30 minutes and
200-ish lines of cookie-cutter code) to complicated (mapsource.c is
approaching 1700 lines of code)
Most vendors provide some kind of import/export facility. It's worth
checking with the the Navmaster people.