On Feb 19, 2009, at 15:38, andrzej zaborowski wrote: > 2009/2/19 Robert (Jamie) Munro <[email protected]>: >> The right solution here is to map 0-360 degrees to the unsigned >> integers >> 0-2^32. When you get an overflow, the right thing happens. It also >> makes >> the most efficient use of the resolution available.
Yes, that sounds good. > It doesn't really solve the main problem which is likely that a way > segment connecting two nodes on the opposite sides of 180 deg can be > interpreted as either crossing the meridian 180 or not. And there > doesn't seem to be a solution to that, other than "duplicating" part > of surface, i.e. allowing nodes so be stored as having longitude of > 181 deg or -179 deg. No, the interpretation of that segment not crossing the meridian is wrong. Viewing the earth as a sphere, the segment from node 1 to node 2 is the shorter part of the great circle going through node 1 and node 2. Cheers Robert _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
