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GPS data comments

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ScottMorris:
Hi,

I was pleasantly surprised to find GPS waypoints and routes for the GDMBR in a format that my program can read (I'm one of the authors of TopoFusion).  This is too cool!!  Excellent job Fred and others involved with the project!

We will be riding the GDMBR this summer (south to north) and following the waypoints along the way.  I'll be recording a track log the whole time (or trying to at least).  If all turns out well, I'll make the data available to those interested.

My only comment so far is that perhaps the route waypoints could have a different naming convention than the points of interest (bike shops, campgrounds, etc) so that it is easier to differentiate them.  I suppose that is what the symbols are for.  After seeing these files I am finally motivated to add graphical support for different symbols in TopoFusion (currently it can deal with them but won't show the graphics).

Again, good work.  I can't wait to get out on the trail.

Scott Morris
www.topofusion.com

Fred Hiltz:
Hi Scott. It is a pleasure to meet another bike freak/GPS geek. Your GDMBR waypoint corrections and track logs will be most valuable. It's no surprise that the maps and aerial photos of the off-road sections are less complete and less accurate than the country's road maps. I would much appreciate any data that you can contribute to the next revision of that route. Send it to Adventure Cycling or to me (fhiltz at yahoo dot com).

We did consider coding waypoint type into the waypoint names, but ran into the inevitable design compromises. Our lowest common denominator target is a non-mapping GPSR limited to six-character waypoint names and supported by non-mapping management software like G7ToCE and others that run on a small PDA.

Providing world-wide unique names and a route-riding sequence that works without a map won out over waypoint typing in that limited namespace. Hence the use of the symbols.

I envy you this summer's ride. Have a ball, stay safe, and bring back lots of pictures along with all those waypoints and tracks.

Fred Hiltz

ScottMorris:
I will endeavor to collect a complete log of the route, but knowning all the things that can go wrong in the process, it's likely to be far from perfect.  We'll see if the GPS 60CS is up to the task.  I am impressed with the battery run times I have got with it.

Hopefully I'll also have plenty of pictures to georeference on the route as well.

For the naming, I was only suggesting a difference between naming for the route (turns, etc) waypoints and the services waypoints.  Maybe just the leading character or something.  But it's not a big deal.

Still knee deep in water/day planning research for New Mexico.  It looks like some arduous riding is ahead of us.  Having the route defined combined with access to Terraserver's maps (through TopoFusion) is proving quite useful.  

Fred Hiltz:
Thanks, Scott. Don't trust the off road waypoints any further than you can throw your map. You may be the first to field-check the GPS data. A lot of folks will appreciate your results.

Playing with MapSource, I saw that the 60C can hold US Topo maps for the whole GDMBR. Impressive! Now, if Garmin would give us 3000 waypoints...

Fred

ScottMorris:
I haven't tried loading all the maps yet, so that's good news.  

Ah, so I suppose an obvious relevant question is how were the route waypoints determined?  As far as I have followed them (to Plataro), they seem pretty reasonable as far as aerial photographs go.  The topos seem to be quite out of date in many cases, but the route "makes sense" if you look at the aerials.

But, my paper maps are on the way.  Thanks.

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