[GRASSLIST:9766] GPStrans issues (need solutions for GRASS based tutorial)

GRASS GRASS user
1

hey gang.

GRASS 6.1
gpstrans 0.39

I can download tracks as points, but nothing comes if I remove the force data as point option.

I was hoping to be able to transfer data from GPS track as vector line.

One track will be the perimeter of a green space and then a second track represents a path.

Perimeter will hopefully become a boundary
Path will be a line

GPSman transfers in the tracks as lines fine, but I would like to get GPS trans working...

ERROR/WARNING

min -vt output=track05 port=/dev/tts/USB0
output=track05
port=/dev/tts/USB0
GPStrans (ASCII) - Version 0.39
Copyright (c) 1995 by Carsten Tschach (tschach@zedat.fu-berlin.de)
Linux/KKJ mods by Janne Sinkkonen <janne@iki.fi> (1996)
Copyright (c) 2000 German Grid by Andreas Lange <andreas.lange@rhein-main.de>
Copyright (c) 1998,2000 Mayko-mXmap mods by Matthias Kattanek <mattes@ugraf.com>
Copyright (c) 2001 Development by Joao Seabra-CT2GNL <seabra@ci.AAC.uc.pt>
Uploading Track
Coordinate format: DDD
tail: `-1' option is obsolete; use `-n 1' since this will be removed in the futu

re
Attempting waypoint projection transform with cs2cs
Importing with v.in.ascii
Error reading ascii file:
[ -4900635.1925408 9181269.5645850]
Building topology ...
0 primitives registered 0 areas built 0 isles built
Attaching islands:
Attaching centroids: Topology was built.
Number of nodes : 0
Number of primitives: 0
Number of points : 0
Number of lines : 0
Number of boundaries: 0
Number of centroids : 0
Number of areas : 0
Number of isles : 0
v.in.garmin: line vector "track05@sampson" successfully created
Creating new table..
Populating table with attributes..
Connecting attribute table to vector file..
WARNING: The table <track05> is now part of vector map <track05> and may be
         deleted or overwritten by GRASS modules.
WARNING: Select privileges were granted on the table.

<track05> columns:
cat
start_time
start_lat
start_lon
end_time
end_lat
end_lon

the dbf file has

cat,N,11,0 start_time,C,40 start_lat,N,20,6 start_lon,N,20,6 end_time,C,40 end_lat,N,20,6 end_lon,N,20,6
0 12/31/1989 -5:00:-1 45.29 -75.75
  0 0

When I force points I get a fully populated table and many points on the display.

Workaround:

I tried turning the vector points into lines but could not find the correct module for the life of me.

Any help would be nice

Cheers

2

[v.in.garmin]

Hi, looking into this some more..

v.in.garmin -vt output=track05 port=/dev/tts/USB0
output=track05
port=/dev/tts/USB0
GPStrans (ASCII) - Version 0.39
Copyright (c) 1995 by Carsten Tschach (tschach@zedat.fu-berlin.de)
Linux/KKJ mods by Janne Sinkkonen <janne@iki.fi> (1996)
Copyright (c) 2000 German Grid by Andreas Lange
<andreas.lange@rhein-main.de>
Copyright (c) 1998,2000 Mayko-mXmap mods by Matthias Kattanek
<mattes@ugraf.com>
Copyright (c) 2001 Development by Joao Seabra-CT2GNL
<seabra@ci.AAC.uc.pt> Uploading Track
Coordinate format: DDD
tail: `-1' option is obsolete; use `-n 1' since this will be removed
in the future

that indicates an older version of the script is being used, please
update to the latest CVS.

Attempting waypoint projection transform with cs2cs
Importing with v.in.ascii
Error reading ascii file:
[ -4900635.1925408 9181269.5645850]

this is where it goes wrong.... it is a v.in.ascii error (a2b.c) but the
script fails to stop. Since March 30 last year the v.in.garmin script
has tested to make sure that v.in.ascii worked before going on.

don't know WHY it fails, but I suggesting you update to the lastest
GRASS cvs where v.in.ascii is a bit more robust. If it continue, please
comment out (add a # to the start of the line) the "rm -f $TMP*" lines
and send me the temp files in $MAPSET/.tmp/.

Building topology ...
0 primitives registered
0 areas built
0 isles built
Attaching islands:
Attaching centroids: Topology was built.
Number of nodes : 0
Number of primitives: 0
Number of points : 0
Number of lines : 0
Number of boundaries: 0
Number of centroids : 0
Number of areas : 0
Number of isles : 0
v.in.garmin: line vector "track05@sampson" successfully created
Creating new table..
Populating table with attributes..

Also did you say "y" to the etrex question in "gpstrans -s" setup?
(see the help page about the gpstrans setup)

I have now tested v.in.garmin on a laptop without a serial port (via a
keyspan Serial->USB converter) and it all worked fine for me.

I have found that not all Serial->USB converters work with all
equipment. The keyspan ones seem to work the best (in windows anyway).
I haven't had problems with them in linux, but then most of our field
equipment uses Windows interface software, and a number of the equipment
manufactures recommend/require them. Hopefully in the future the
generics will improve. (loose timing issue I think)
Hopefully too the garmin protocol is low-baud rate enough for this not
to be an issue for v.in.garmin.

Hamish