<div class="gmail_quote">On Fri, Sep 10, 2010 at 1:57 AM, M∡rtin Koppenhoefer <span dir="ltr"><<a href="mailto:dieterdreist@gmail.com">dieterdreist@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
the point was: draw an area where it is. If it has holes, put them. A<br>
building in the park doesn't cut a hole in the park, because it is<br>
usually considered to be a building in the park. A building on the<br>
lawn (landcover=grass, even if this tag is not ufficial, it's just an<br>
example) will need a hole cut, because the building is not grass. This<br>
is independent of the rendering.<br></blockquote><div><br>I think the average contributor will not understand what you say.<br> </div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
Imagine someone would want to calculate all grass area (and everything<br>
would be mapped).<br><br></blockquote><div><br>This can be preprocessed (remove building area on the same layer). <br></div></div><br>Pieren<br>