[GRASS5] GPS connectivity

GRASS GRASS developer
1

Hi developers,

i wrote down some ideas for GPS connectivity for GRASS.
You can get the textfile from
http://mitglied.tripod.de/AndreasLange/grass/gps/index.html .

If you have ideas or want to join me an existing project, please
contatct me. Is there someone already working on this?

Andreas

--
Andreas Lange, 65187 Wiesbaden, Germany, Tel. +49 611 807850
Andreas.Lange@Rhein-Main.de, A.C.Lange@GMX.net

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2

I've got a garmin connectivity library up and running in Tcl.

From this, it's trivial to construct scripts that download

waypoints and convert them to site files, or download routes
and save them as ascii vector files. I have the basics of
this running already, but I'm working out the "distribution"
kinks right now.

Also, a generic base GPS class could be used so that multiple
types of gps units could be supported via specialization.
Again, all within Tcl (Incr Tcl, to be precise).

Now that I think about it, if I say (for now, at least) that
it is expected to be installed into a grass directory structure,
a lot of my distributability concerns go away. Hmm. maybe I can
have a tarball ready in a night of hacking (probably a week
calendar time).

Andreas Lange wrote:

Hi developers,

i wrote down some ideas for GPS connectivity for GRASS.
You can get the textfile from
http://mitglied.tripod.de/AndreasLange/grass/gps/index.html .

If you have ideas or want to join me an existing project, please
contatct me. Is there someone already working on this?

Andreas

--
Andreas Lange, 65187 Wiesbaden, Germany, Tel. +49 611 807850
Andreas.Lange@Rhein-Main.de, A.C.Lange@GMX.net

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| Eric B. Mitchell mailto:emitchell@altaira.com |
| tel: (301) 809 - 3534 Altair Aerospace Corporation |
| tel: (800) 7 - ALTAIR 4201 Northview Dr. Suite 410 |
| fax: (301) 805 - 8122 Bowie, MD 20716 |
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3

Eric Mitchell wrote:

I've got a garmin connectivity library up and running in Tcl.

Does your lib support the whole Garmin spectra or just 12/12xl/48/GPS
II?
Is it a derivative of GPSMan?, MacGPS?, GPSTrans?

BTW the eTrex and eMap devices seem to be not yet well documented in the
GARMIN
GPS Interface Specification (12/6/1999).

I am interested.....

--
----------------------------------
E-Mail: candrsn@mindspring.com
Date: Sun, 01:00:00 +0000 (GMT)

Flying Monkeys Usually Mean Trouble.
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4

On Wed, 24 May 2000, Andreas Lange wrote:

i wrote down some ideas for GPS connectivity for GRASS.
You can get the textfile from
http://mitglied.tripod.de/AndreasLange/grass/gps/index.html .

Andreas,

  I'd like to see what you've written, but I cannot reach your home page.
For whatever the reason, Navigator halts at the domain (mitglied.tripod.de)
and will not display any pages below that.

If you have ideas or want to join me an existing project, please
contatct me. Is there someone already working on this?

  My needs for the GPS software are mission planning and differential
correction. In many areas where we work (particularly in Oregon and
Washington, west of the Cascade Mountains), I can receive the real-time
correction signal from the US Coast Guard transmitters. This gives me
differentially-corrected positional readings (horizontal accuracy +/- 30 cm;
vertical accuracy +/- 60-90 cm) which I suppose I could download directly to
GRASS. However, when I have to differentially correct by post-processing the
raw data, I still need the software from my GPS vendor.

Rich

Dr. Richard B. Shepard, President

                       Applied Ecosystem Services, Inc. (TM)
              Making environmentally-responsible mining happen. (SM)
                       --------------------------------
            2404 SW 22nd Street | Troutdale, OR 97060-1247 | U.S.A.
+ 1 503-667-4517 (voice) | + 1 503-667-8863 (fax) | rshepard@appl-ecosys.com

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5

Carl Anderson wrote:

Eric Mitchell wrote:
>
> I've got a garmin connectivity library up and running in Tcl.

Does your lib support the whole Garmin spectra or just 12/12xl/48/GPS
II?
Is it a derivative of GPSMan?, MacGPS?, GPSTrans?

My library follows the Garmin Interface Docs. As I don't have
a device that implements the Protocol Specification Protocol, I
haven't even tried to code that part of it. If someone were
interested in loading me one, I'd be happy to do it, though. =)

On the current data I have in my Garmin GPS12, GPSMan fails to
download all the waypoints, and GPSTrans fails to download all
the routes. Rather than fix the bugs in their garmin serial
protocol processors (failure to correctly process embedded DLEs
in checksum/length bytes or zero checksum values), I made my own.
My theory is that the library should be generic enough that you
say: "get the waypoints" and you get a structure containing
generic waypoint data. What you do with it from there is up to you.
This makes it pretty simple to output ascii site and ascii vector
files for grass. I have much of the functionality of GPSTrans
working in a single script (uploads need some parsing work).

BTW the eTrex and eMap devices seem to be not yet well documented in the
GARMIN
GPS Interface Specification (12/6/1999).

Newer Garmin devices support a method by which the data formats
for exchanging information can be queried from the device
automatically. Do you know if they support this functionality?

I am interested.....

--
----------------------------------
E-Mail: candrsn@mindspring.com

-- ebm
+=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=+
| Eric B. Mitchell mailto:emitchell@altaira.com |
| tel: (301) 809 - 3534 Altair Aerospace Corporation |
| tel: (800) 7 - ALTAIR 4201 Northview Dr. Suite 410 |
| fax: (301) 805 - 8122 Bowie, MD 20716 |
+=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=+
              ,___
          /"\ / o=\ /"""---===/
         / \_/ \__/ ---===/
         | //\ || /""TT""/ //\ || ||""\
         | // \ || || // \ || ||__/
         | //--==\ |L--/ || //--==\ || || "=,
          \ ---===/
           \____---===/

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