[mkgmap-dev] roundabouts

Sun Feb 12 11:39:45 GMT 2017

Hi all,

the default style contains these rules for roundabouts:
# Roundabouts
junction=roundabout & (highway=trunk | highway=trunk_link) [0x0c road_class=3 road_speed=2 resolution 18]
junction=roundabout & (highway=primary | highway=primary_link) [0x0c road_class=3 road_speed=2 resolution 19]
junction=roundabout & (highway=secondary | highway=secondary_link) [0x0c road_class=2 road_speed=2 resolution 20]
junction=roundabout & (highway=tertiary | highway=tertiary_link) [0x0c road_class=1 road_speed=1 resolution 21]
junction=roundabout & highway=unclassified [0x0c road_class=1 road_speed=1 resolution 21]
junction=roundabout & highway=* [0x0c road_class=0 road_speed=1 resolution 22]

The wanted effect is that the Garmin device/software produces hints like "enter roundabout" or "Take the 2nd right onto" ...
The disadvantage is that the roundabout is not rendered.

I replaced all the above rules by 
junction=roundabout & highway=* [0x0c road_class=0 road_speed=0 resolution 24 continue]

I tried this with car + bicycle routing and it seems to give the expected results (routing hints and rendered roads).
Also the --check-roundabouts option doesn't complain. 

Alternative might be to keep the distinction of road types for better time estimation, important point is that
"resoltion 24 continue "
is used.

Comments?

Gerd