[mkgmap-dev] Question about Resolutions in Default Style.

I would like to understand a few statements in the default mkgmap style: The default 'option' file defines resolutions as: levels = 0:24, 1:22, 2:20, 3:18, 4:16. Yet in 'polygons' file the following line exists: natural=sea [0x32 resolution 10] and in 'lines' file the following line exists; natural=coastline [0x15 resolution 12] Do these lines have the same effect in this style as the following: natural=sea [0x32 resolution 16] natural=coastline [0x15 resolution 16] or is there a subtle difference?. Also, in the 'lines' file the following statement exists: highway=* & area!=yes [0x07 ] Is the effect of a match to draw [0x07] at ALL resolutions? Thanks, Bill.