Thanks to everyone for their help so far. It seems like this is much
less straightforward than I had expected. I've looked into some of the
options e.g. QLandkarte, cGISmapper and tried to upload a ready-made
.img file but had problems with the port speed (I'm using a usb/serial
converter to connect to the GPS).
As I am most interested in loading up my road data, I thought about
putting them on as tracks. I exported the vector map to kml, then used
gpsbabel to convert to .gpx format. I then edited this by hand to name
the tracks and join all the parts into track segments. Unfortunately
when it loads up, all the segments get joined together so that the end
of one road jumps onto the start of the next. I think that either
gpsbabel or my etrex don't support that feature.
So now I have a new plan: is it possible to use v.net.salesman to
export a single track that covers every road in my network and doubles
back on itself to return to the start? If so, can someone give me some
pointers on how to do it - I'm still getting to grips with the vector
format and don't really have a clue where to start.
Thanks,
John
Tom Russo wrote:
On Thu, Aug 07, 2008 at 10:12:08AM -0700, we recorded a bogon-computron collision of
the <[EMAIL PROTECTED]> flavor, containing:
I see some room for confusion here. I think on Garmins the basemaps
"built-in maps" are not vector format but raster format .img files.
So the short answer is you can't dump them on the way you're trying to,
you need to convert them.
Try looking at cgpsmapper and GPSMapEdit. Neither is open source, but
both work under WINE on linux. There's a Linux build of cgpsmapper, too.
These tools will let you create maps for your Garmin GPS from various vector
data (with a lot of work). See:
http://home.cinci.rr.com/creek/garmin.htm
for a walk through the process and links to the tools.
Since you've already imported your GPX files from gpsbabel into GRASS, you
can just export them as shapefiles for reading into GPSMapEdit.
GPSMapEdit will read shapefiles, but it's a bit of a chore to get it Just Right.There is
talk about making an OGR output format that can handle the "Polish"
format used by cgpsmapper, but it ain't there yet. I'm not aware of any
other tool than GPSMapEdit that can write Polish format from shapefiles.
HTH,
T.
John C. Tull wrote:
I've used gpsbabel for moving points, tracks, and routes to/from a
Garmin GPSV.
http://www.gpsbabel.org
John
On Aug 7, 2008, at 5:17 AM, John Stevenson wrote:
I have digitised some points, roads and a lake in GRASS and would like
to be able to upload them onto my Garmin Etrex Legend.
I have been able to use v.out.ogr format=kml to output the points, and
can upload them to the GPS with gpsbabel.
However, I would like the roads and the lake to be loaded into the
built-in maps. I read a post on the GRASS mailing list archive that
mentioned cGPSmapper, but it seems like this only works with ESRI
shape files (v.out.ogr again) if you have one of the paid-for versions.
Is there any open source software that can do this? Can GRASS export
in a format that can be more easily converted to be compatible with
the GPS?
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