All this sounds really good :-) I followed discussions about the geometry template library, but I hadn't enough time to read them precisely. I hadn't realized it was that close to what I just described.
You said earlier that you were needing some help. Could you be more precise?
Bruno Yes, some help would be welcome.
Based on the valuable comments from the boost list I'm now implementing the changes leading to this new design with xy and latlong points, strategies and algorithms. This is exciting but takes some time of course. Besides this we also planned to Opensource/templatify/boostify our projection algorithms. So in the end it is more work than planned. And of course there might be more rework if more people from different environments will examine the preview. Therefore I was triggered to the Summer of Code request on this list. The preview will soon be published again and it would be nice to get in contact with interested people who like the design and want to help with the "completion" (if a geometry library is ever complete). Barend