On Tuesday, November 12, 2019 at 2:07:47 AM UTC-8, Harry van der Wolf wrote:
>
> Do you use  "road_only" maps? They already are a lot cleaner (and smaller) 
> than the full maps. ...
>

This seems quite interesting. It should get rid of a great deal of clutter 
and substantially reduce the size of the map files I'd have on my cell 
phone. Googling around, I found a discussion on this approach here:  Find 
road only maps for download 
<https://help.openstreetmap.org/questions/53725/find-road-only-maps-for-download>

What I get from the discussion is that I can start with a standard 
downloaded map (e.g., from GEOFABRIK 
<https://www.geofabrik.de/data/download.html>), then filter it to keep only 
highways, as follows:

osmfilter my-data.osm --keep=highway=* -o=my-data-highway.osm


I can then (in theory) use OsmAndMapCreator to try out different color 
schemes, using UniRS and a dependent render file. At some point, I can move 
the data and render files to my cell phone. Problem is, I'm not at all 
clear on how to do all this. So, I still need a bit of help...

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