It is clear when zooming in on my GPSMAP 62s that Garmin can make use of resolutions greater than 24 with regard to 'styling':

I have a map in which I go with the default 'styling' for 'Residential Roads (0x06)' by not specifying this in my TYP file.  I zoom-in to the point where I know that level=0 (resolution 24) is displayed and then when I zoom-in further, the thickness of the 0x06 road in the Garmin style definitely gets increases.  I can clearly see this if examine with or without a magnifying glass on the screen.  So Garmin have definitely got a way to extend their variation of line thickness's beyond the resolution 24 level that is available for us to configure with mkgmap.

This maybe something new implemented on the newer Garmin GPS devices that have higher resolution screens.  Can mkgmap be extended so that the user can specify styles to appear when zoomed-in over resolution 24 like Garmin do?.

Bill.