820: How to change Routable Cycle map of Europe to Australia?

garmin.openstreetmap.nl/ seems to be okay now. I downloaded the gmapsupp.zip for the UK today.

If the routing doesn't work, try disabling the "world basemap". This shouldn't be necessary but so e people have reported issues with having the basemap enabled. You can live with the basemap disabled but it's a bit better if it's not disabled.

When I use the openstreet maps, the default basemap seems to have no effect. through a lot of testing, i found the map detail level really only effects at what zoom level the 820 will show your detailed Open Cycle maps and when it will show the base map. With detail set to most, when you zoom out the open cycle maps show longer making the map somewhat cluttered. ....However, when I disable the opencycle maps and enable my downloaded openstreet maps when I zoom out to the specific zoom level where the basemap would show, the downloaded map will disappear but the basemap is not shown.

I haven't had issues with routing but as far as I can tell there is no point in enabling the basemap at all since it's never displayed when using the openstreet maps.

I considered re-naming my downloaded opencycle maps to replace the Garmin Open Cycle maps to see if that would resolve the issue (after backing up of course.)

Interesting that you use the free maps over the garmin 820 maps. That is pretty damning of garmin

I also choose the Openstreet maps over the default Garmin opencycle maps for a few reasons;

1) It is my understanding that (at least in the US) the Garmin OpenCycle maps that come with the Edge 820 are based on the Openstreetmap data but just use different formatting and display roads, trails, forests differently.

2) The default Garmin maps are outdated (I don't know if they are ever updated when Garmin pushes firmware update but I don't think so.) Openstreetmaps are being updated all of the time so you can simply download and install a new one when needed. I've actually updated many of the trails in one of my local areas directly in Openstreetmaps which can now be viewed and routed on my edge 820. These trails of course don't show on the default maps.

3) As far as I know, the Garmin maps don't offer any functionality or features over the free downloaded Openstreet maps. Except I believe there is a bug with zooming out to the basemap. (described in my post above.)

4) I only mountain bike and the way the Garmin maps display trails - especially if there is a designated forest background - are very difficult to read when out in the woods. (trails are thin black dotted lines over dark green background) Open Street maps provides several formatting options which are generally easier to read.

Actually - I recently started using OpenMTBmaps which provide a "wide" format which shows the off-road trails much better on the 820. I had to pay $10 or so for these maps in the US but I guess they are free if you are in Europe. There are some minor issues (for example - a large lake doesn't show on the OpenMTBmap. It seems this is acutally caused by how the lake is currently tagged in openstreetmaps. but the lake will show on the default maps and also the standard OpenstreetMaps.

I hope that helps.

2) The default Garmin maps are outdated (I don't know if they are ever updated when Garmin pushes firmware update but I don't think so.) Openstreetmaps are being updated all of the time so you can simply download and install a new one when needed. I've actually updated many of the trails in one of my local areas directly in Openstreetmaps which can now be viewed and routed on my edge 820. These trails of course don't show on the default maps.

The Garmin Cycle maps are updated (about 4 times a year).

The maps that are installed by Garmin are really big files. It also takes a long time to update them on the device.

People would complain if they were updated frequently (like every two weeks).

3) As far as I know, the Garmin maps don't offer any functionality or features over the free downloaded Openstreet maps. Except I believe there is a bug with zooming out to the basemap. (described in my post above.)

The Garmin maps basically don't offer any other functionality.

There are some minor issues (for example - a large lake doesn't show on the OpenMTBmap. It seems this is acutally caused by how the lake is currently tagged in openstreetmaps. but the lake will show on the default maps and also the standard OpenstreetMaps.

What's the lake? There's some choices that can be made in the process that converts the OSM data to the img file. There could be differences there between different sources of the OSM Garmin maps.

What's the lake? There's some choices that can be made in the process that converts the OSM data to the img file. There could be differences there between different sources of the OSM Garmin maps.

Okay I'm going a bit off topic but I could use assistance if you know about OSM.

The lake is actually a pond. It's called Olney Pond in Lincoln Woods in Lincoln RI (US).

You are correct that the difference in maps is caused by the source creating the file. The guy who creates the OpenMTBmaps is a bit more restrictive on what is displayed which I'm sure is to keep the MTB maps less cluttered. The off-road trails are more prominent and other items less so to make the maps more readable for MT biking.

I reached out the OpenMTBmaps and the issue with the pond is that it is tagged as a pond but is located inside another area which is tagged as a park. I believe the park is located on top of the pond. He indicated the park can be tagged as multipolygon with outer and inner area's defined so that it cuts the lake out of the park. I started researching proper tagging in Openstreetmaps but it indicates using multipolygon for this purpose in not good practice. ...so i'm trying to figure this out. If you happen to know how this should be tagged so that it shows in ALL OSM applications I would appreaciate any help. The problem is that it does show in standard OSM maps I download from http://garmin.openstreetmap.nl/ but not on the OpenMTBmaps.

If the park is on top of the pond and that is causing the issue (ie. the pond is being eclipsed by the park) then the obvious solution is to bring the pond layer to the top in OSM - back when I mapped my village & surrounds the most versatile editor was JOSM (look in the OSM Wiki under Editors)

I reached out the OpenMTBmaps and the issue with the pond is that it is tagged as a pond but is located inside another area which is tagged as a park. I believe the park is located on top of the pond. He indicated the park can be tagged as multipolygon with outer and inner area's defined so that it cuts the lake out of the park. I started researching proper tagging in Openstreetmaps but it indicates using multipolygon for this purpose in not good practice.

It's not good practice because it isn't what is meant. The pond/lake is inside the park. Can you image the huge amount of work it would take to apply this "fix"?

The pond shows up in Basecamp using either BBBike or the garmin.openstreetmap.nl map.

Another pond/lake in a park near me shows up in those maps in Basecamp but not on my Edge 800.

So, it seems the draw order of things are not correct on the Garmins.

I think that the bodies of water are actually more useful than park areas.

If the park is on top of the pond and that is causing the issue (ie. the pond is being eclipsed by the park) then the obvious solution is to bring the pond layer to the top in OSM - back when I mapped my village & surrounds the most versatile editor was JOSM (look in the OSM Wiki under Editors)

This suggestion isn't really ideal since parks or lakes aren't assigned to levels. Your suggestion would necessitate changing every lake or park.

And most map renderers draw the lakes properly on top of park areas.

The issue appears to be a problem with how the Edges render maps. It's an error to update OSM data to fix devices that don't do things properly.

okay I agree but it doesn't seem to be an issue with the Edge 820 as the default Open Cycle maps as well as the openstreetmaps from http://garmin.openstreetmap.nl/ both show this pond and the park on the edge 820.

Olney Pond shows up on my Edge 800 too. (Now, I have to figure out why "my" pond isn't showing up.)

That suggests that the OpenMTBmaps are being compiled differently.

There are only a few compilation programs. mkgmap is (probably) the most used. OpenMTBmaps and garmin.openstreetmap.nl are likely using mkgmap.

Road Stadio

When I use the openstreet maps, the default basemap seems to have no effect. through a lot of testing, i found the map detail level really only effects at what zoom level the 820 will show your detailed Open Cycle maps and when it will show the base map. With detail set to most, when you zoom out the open cycle maps show longer making the map somewhat cluttered. ....However, when I disable the opencycle maps and enable my downloaded openstreet maps when I zoom out to the specific zoom level where the basemap would show, the downloaded map will disappear but the basemap is not shown.

I also experienced the problem with disappearing maps. My initial suspicion was as well that something goes wrong with the basemap. But there is a problem with the pre installed "Edge DEM Map". Disabling this map on my Edge 820 solved the problem and the downloaded OSM map was displayed as expected on all zoom levels.