Hi All Following from Jorics' response to Gerd have done some more research regarding lines on Basecamp: *Lines with non extended types* it seems that the highest line type is 0x3F Strangely Mapsource shows a repeat of lines 0 to 3F starting from 0x40 This looks like mkgmap allows such types but Garmin seems to set a 'flag' of some kind and regards 0x40 as 0x0 etc Not Visible : 0x17 , 0x 2c , 0x30 - 0x3F Not customisable Labels: 0x20 - 0x22 *Extended Lines* Not Visible : 0x10200 - 102FF , 1080e , 0812 - 1081f, 10b05-10b1f , 12e00 -anything higher No Labels : 0x10906 - 1091f , 10b02-10b04 <http://gis.19327.n8.nabble.com/file/t339487/lines.jpg> -- Sent from: http://gis.19327.n8.nabble.com/Mkgmap-Development-f5324443.html