Are you a heavy duty styler? If so, read on: I notice that quite a lot of postings on the list are from people who are having problems with complex style files. This little patch won't (directly) solve those problems but it does provide a useful capability that could be part of a solution for those people who have complex styling requirements and are willing to do some coding. What the patch does is allow elements (nodes, ways) to specify their garmin type (and a few other things) explicitly using these tags: mkgmap:gtype the element's type (integer constant) [snip] Do you think the problem is that the style rules are too hard to figure out, that there are bugs, or that they aren't expressive enough? I wonder about adding extension language support so that people could write a program that takes an element and figures out what to do with it. We sort of have this, but not a real language. I suppose that is one possible read/crunch/write external program and your patch enables such experimentation.