Gerd, Thanks for the help on the pipeline rendering. Your rule had one error in it, the word "way" but mkgmap complained and provided the line number of the error so it was easy to fix. I checked to see if the sections of the TAP pipeline where I removed the tags were rendered properly, and they were, even the sections that are underground or overground show up fine. Of course, those ways already carry the location tag. My line styles have provisions for both. type=route & route=pipeline { apply { set man_made=pipeline; } } During the long conversation about tagging relation members that began by trying to come up with a method of tagging groups of lakes. Someone suggested creating a new relation type of "group" to handle such things. I didn't want to do that so stuck with using a multipolygon to group a set of lakes that have a single name. Then I encountered a situation that was ideal for an experiment, three rocks near Kodiak Island that have the name "Three Sisters Rocks". These are nodes, not ways, so the multipolygon approach really doesn't suit them well. I create a new relation, tagged it as type=group and added the nodes to it. Of course, the rocks do not render on the OSM slippy map but they did on mymkgmap file because I added the following rule to the relations style sheet: type=group & name=* { apply { set name='${name}'; } } -- Dave Swarthout Homer, Alaska Chiang Mai, Thailand Travel Blog at http://dswarthout.blogspot.com