Captain Eagle - the the old days of hovering over someone's landing site and taking lots of invasive photographs are long gone; these days we have a method which is technologically far superior. What we do is fly along on the way back from a task and say to each other, "Oh look there's a new helipad in that back garden, lucky chap". We then get back in the office and [this is the real breakthrough] we break open the box of felt-tip pens and mark the site on the wall map. It's cutting edge stuff I know and perhaps a bit controversial but I think it could be here to stay...