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Messages - mdxix

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You would give up the navigation feature, though.
That is curious Fred. As far as I can tell, the GPS will navigate based on the route (and route points), irrelevant of the waypoints it has scattered on the map. Do you think it works differently?

I tested the following for the Green Mountains loop. I stripped the file from all waypoints as follows:

I loaded the file on my Edge 705 and started navigating R01010 as shown in the following image:

In the two panels to the left, you see the navigation route, distance to next, and prompts at turns. In this case, the Edge 705 shows only straight lines. But that is a different topic that we discussed at length.

In the right panel, the list of waypoints is empty.

Is your experience different?

Could you load the maps on the GPS unit without the waypoints? Do you need them on the GPS? Refer to the paper maps as needed along the way for points of interest.

New England / Re: New Haven to Albany, suggested routes?
« on: July 27, 2012, 12:21:54 am »
Take a look at CT bicycle map. Route 5 connects New Haven to Canaan in NW CT. From there, head west to reach NY State Bicycle Route 9. That will get you all the north to Albany.

General Discussion / Re: Bicycle shop Seattle
« on: June 11, 2012, 01:07:36 pm »
Builders of Davidson bicycles:

Large store with multiple branches in the region:

General Discussion / Re: Images are not appearing in ACA forum post
« on: June 03, 2012, 09:18:47 pm »
That seems to have fixed it.

I edited the post today with links to images hosted externally. I can now see them when logged in or not.

Thank you.

General Discussion / Images are not appearing in ACA forum post
« on: June 02, 2012, 11:10:19 am »
I have attached images to a post on the ACA forum at

I noticed these images do not appear unless I am logged in. If I logout, I can see all the text entries in the post, but cannot see the images.

Is that by design? Is there something I need to do to enable the images to appear all the time?

GPS Discussion / Re: Open Street Map?
« on: June 02, 2012, 12:16:07 am »
I was not able to navigate to addresses in the United States and Canada using OSM.

OSM does not seem to recognize states. It shows data at the country level. I suppose this may work in other countries, where city names are indeed unique in the entire country. Alas, that is not the case in the US.

Below are two sets of images. The first set is when entering an address in City Navigator:

The second is in OSM:

  • Region: City Navigator shows list of states and provinces. OSM shows countries
  • City: City Navigator shows zip codes and city name associated with the state they are in. OSM, however, displays the city name associated with the country.

GPS Discussion / Re: Open Street Map?
« on: June 02, 2012, 12:06:54 am »
Note in the previous post how the distance of the route in the two maps is calculated slightly differently. I am not sure exactly why. I think it is because they are two different maps. Roads on them are charted differently causing the discrepancy.

There is another reason. I used Google Maps on to create route. The waypoints from that route do not match exactly those on the GPS unit. Take a look at the sticky topic Using Adventure Cycling GPS Data, under the title Variations among maps.

Especially in this case, the waypoints and track points were off in some cases when using OSM.

Note in the image below:
  • The first tile shows a prompt to go "Left off of Newfield Court", while there is no left.
  • The second and third tiles show an extra spur for the route, followed immediately by a U-turn.

I found this misalignment to occur about once on most routes. But it is very easy to recognize.

GPS Discussion / Re: Open Street Map?
« on: June 01, 2012, 11:44:18 pm »
Navigation worked exactly the same on both sets of maps: City Navigator North America & OSM.

Note the images below of navigation sequence for each map. They each contain:
  • Preview of the route
  • Preview of the cue sheet
  • First prompt with advanced notice to turn
  • Second prompt for immediate turn

The only difference between the two are the labels for roads, such as "Ridgewood Rd" versus "Ridgeweed Road", and "East St" versus "East Street (217)".

The first set of images below is for City Navigator North America:

The second set is for OSM:

GPS Discussion / Re: Open Street Map?
« on: June 01, 2012, 11:33:18 pm »
I have been testing the Open Source Map (OSM) on my Edge 705 for the past two months. I used it on the bicycle and in the car, in the United States and Canada.

For my most frequent use of the GPS, the map worked as expected:
  • Navigates roads that are previously mapped.
  • Shows detailed maps of all roads I was on, even minor ones in rural areas and inside state parks.
  • Shows some services and points of interest in nearby areas. These are dependent on the information entered in OSM
  • Shows turn by turn directions, prompts for each turn, distance to next, distance to destination, and other measurements.
  • Could not navigate to US & Canadian addresses. The maps do not seem to recognize states. They show data at the country level. Therefore, unless the city name is absolutely unique in the entire United States (or Canada), it was impossible to enter it as part of the address.
  • Because I was not able to enter my home address, I had to use its location so I can use the "Go Home" function
More details are in following posts to keep topics separate.

Meanwhile, I would at least try to use OSM in the following cases:
  • Do not own Garmin City Navigator maps. OSM is free. As far as I found, it is a snap to install.
  • Traveling to an area out of coverage. At the time of this writing, for example, I cannot find Garmin City Navigator maps for Japan. An OSM map for Japan is available though.
  • Traveling for a short trip to another country. Maps average at about $100. Buying a set for each trip will add up quickly.

Gear Talk / Re: Which Schwalbe
« on: April 24, 2012, 08:31:51 pm »
They seem bullet proof
Says who? ;)

With less than 1,000km on this pair, I got the nastiest of punctures. This old curved handmade nail penetrated the tire and shredded the tube.

General Discussion / Re: Bicycle Touring On Car Free Paths
« on: April 07, 2012, 04:39:39 pm »
Thank you for sharing it. These trails offer very pleasant experience. Here are a few more suggestions from ACA:

GPS Discussion / Re: A GPS question: Garmin eTrex Legend HCx
« on: April 02, 2012, 08:20:00 pm »
I can see the two pictures on the forum page with the response.

GPS Discussion / Re: Open Street Map?
« on: March 31, 2012, 09:27:22 pm »
I downloaded the US map last night on my Edge 705 and have been experimenting with it all of today. So far so good. It took three simple steps:

  • Download the map image in compressed format from The file ( that I downloaded on 30 March 2012 was 2.47GB.
  • Expand the file to gmapsupp.img. Size is 3.31GB.
  • Copy the image file to the Garmin micro SD card under the "garmin" folder. Note:
    • My Edge 705 only supports one map image file that must have the name gmapsupp.img. Other units may support multiple files that can have different names. If you are not sure, then keep this one name.
    • It takes about an hour to copy the file when the micro SD is inserted into the computer, using an adapter. It takes several hours when copying to the GPS unit using USB cable.

In general, to be safe, I use the GPX Track option from (\garmin\gpx folder), and save the TCX course file as backup (\garmin\courses folder). Both options contain breadcrumbs of the mapped route. This is safer for two reasons:

  • Follow the same exact route as it was mapped on the web site. There is less risk of the GPS unit calculating its own route that may be different from the intended one.
  • Maintains the directions and route even when the road happens to be missing from the map, or when the route is on a trail that is not on the map. In fact, with a TCX file from, even without a map, I still get the cue sheet prompts at turns.

The following web site allows for building custom images from selected map sections:

Plenty of instructions are at

I am still experimenting with maps and languages outside the US. I loaded Japan's map and tested a few routes:

  • The text does not display properly. Kanji characters are replaced with commas and periods. Road numbers and other Roman characters do appear.
  • Small roads outside major metropolitan areas seem missing from Open Street Map, even on the web site. Probably will be added in time.

I found an old discussion on this forum circa 2008 at

There is an active discussion on this topic at

I will post more results as I learn more. Pleas share your experience as well.

Without spending a lot of time reloading the versions of MapSource that were current at these times and studying the files, I cannot answer why the old file worked, but not the new.
I answered my own question.

The old file worked because it only had the <rtept> tags, without any <extensions> tag. The Edge realized that it has to figure out the route details on its own. It then calculated the route automatically and navigated on the road accordingly.

The new file has the <extensions> tag. Therefore, the Edge assumed that the route details are within the <extensions> tag and never bothered to calculate the route. But in the case of the new ACA files, the details within the <extensions> tags are not there. The <extensions> tags are empty. Therefore, it just connected the waypoints in straight lines. The Edge does not have the option to force a "Recalculate"  and overwrite the information within the <extensions> tag (even though in this case the detailed breadcrumb information does not exist).

To prove this point, I manually removed the empty <extensions> tags from the new file AC01v007.gpx and created a test file A01010.gpx. That worked. It fixed the problem and the Edge did calculate the route and followed the road.

So I concluded that, to get the ACA routes to work better with the Edge, one needs to either remove the empty extensions or fill them up with the route details.

Again, it looks like the Edge works with what it is given. Given only the waypoints, it navigates straight lines. Given the breadcrumbs of the routepoint extensions, it uses them to navigate roads.
Not quite:
  • Given only the waypoints: it will calculate the route on the map and navigate on roads
  • Given the breadcrumbs of the route point extensions: it uses them to navigate roads. This can be very handy as it includes navigation on off road trails and bicycle paths. There is no option to recalculate and overwrite the given route points
  • Given only the waypoints, with fake route point extensions that are empty: it navigates in straight lines. There is no option to recalculate and overwrite the assumed route points

I will post more on this later.

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