> of course, there's a big difference between "this is the NYC skyline" and "this is the NYC skyline as viewed from the northeast corner of my apartment buildin

> of course, there's a big difference between "this is the NYC skyline" and "this is the NYC skyline as viewed from the northeast corner of my apartment building". Depending on the picture, you might still be able to go from one to the other even without the benefit of exact location information – in fact that's what I've been doing for old pictures in my photo library. As my backlog is somewhat more than a decade, of course I don't remember where exactly each and every picture had been taken, but when geotagging them there's of course still the temptation to place the location marker as accurately as possible. Given a rough location from my memory, Google Earth, GeoSetter's field-of-view on a map/aerial photography display and occasionally a sun angle calculator I've been able to pinpoint the relatively exact location of quite a number of photos.