contour=elevation & contour_ext=elevation_minor					{ name '${ele|conv:m=>ft}'; }	[0x20 resolution 24]
contour=elevation & contour_ext=elevation_medium				{ name '${ele|conv:m=>ft}'; }	[0x21 resolution 23]
contour=elevation & contour_ext=elevation_major					{ name '${ele|conv:m=>ft}'; }	[0x22 resolution 23 continue]
contour=elevation & contour_ext=elevation_major					{ name '${ele|conv:m=>ft}'; }	[0x21 resolution 22-22]