Just an FYI, there is a faster and more reliable way than this painfully slow downloading along track

• Grab a large area from something like geofabrik
• In JOSM get the "poly" plugin
• Create an empty data layer, draw a closed line around your track
• From the normal save menu, save it as ".poly" file
• Split the large .osm.pbf with osmosis like this: "osmosis --read-pbf dach-latest.osm.pbf --bp file=track.poly --write-pbf track.osm.pbf"
  

Hi

I have used JOSM to download a section of the OSM along a railway corridor doing 4 saves into the same layer, then updated the data and saved the lot as an .osm file. I did it this way because the area was too big for one download using JOSM.

But only a portion is made into a Garmin map for my eTrex, the last of the 4 sections saved.

The dropbox image shows the size as JOSM sees the osm file when reloaded and the gmapsupp.img is the red rectangle  https://www.dropbox.com/s/hfeo5zi48wxapl8/JOSM_save.png?dl=0  

Is this the expected result? I wanted all the .osm saved file to be made into the gmapsupp.img

I have tried this process several times with the same result.

Here is the command used from iMac El Capitan 10.11.6 with Java8 Update 101.

/Library/Internet\ 

Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java -jar 

/Applications/mkgmap-r3695/mkgmap.jar 

—gmapsupp 

--style=default 

—transparent 

--description="Mkgmap” 

--family-name="OpenStreetmap Mkgmap” 

--series-name="Josm “ 

--area-name="default “ 

—route 

--drive-on=left 

--output-dir=/Users/MyDirectory/Documents/JOSM/Save_OSM_file/ /Users/MyDirectory/Documents/JOSM/Save_OSM_file/Josm_save.osm

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