I am trying to use an extended line type for an overlay but I'm not successfull. The following information I found in style-manual.pdf on page 30: 2. If a type is >= 0x010000, it is an extended type, which can be used for points, lines, and polygons. This means, extended types for lines are supported, but I could not find any further description in this document. In the wiki http://wiki.openstreetmap.org/wiki/OSM_Map_On_Garmin/Polyline_Types I found this information: For use in mkgmap styles the type and subtype of a polyline are simply concatenated: type 0x12 and subtype 0x34 become 0x1234. As the marine types are marked in mkgmap notation by adding 0x10000 to them, so the type 0x12 and subtype 0x34 become 0x11234 as a marine type. I have tried with linetype 0x1901, but I could not address it neither as 0x1901 nor as 0x11901. Does anybody have an example, how extended line types above 0x00-0x3f can be used? Walter