IIRC, Lambertus also filters out power lines from the data. Does anyone want to have them in the default style? If not, I think that the default style should omit boundaries and power lines. They are rarely useful in well-mapped areas. I completely disagree. Power lines very useful in non-urban well-mapped areas where they are signficant features. But I can see that some people would find them clutter in a dense city. I don't understand the objection to boundaries. Do people really expect those not to appear? I don't understand how we can be talking about "default style" and "multi-layer map" at the same time. It would seem that the default style should support a map that is broadly useful to all people in all circumstances (a tall order). It may be that we end up with a rural and and urban default style, and people have to choose. A multi-layer map with selectable elemnts is a reason to change the default style to simple when the out-of-the-box mkgmap can process the files multiple times, make transparent layers according to a (supplied!) config file, and then merge the results multiple layers into one .img (and make multiple .gmapi/windows). It doesn't seem we are there yet.