User:Mvgulik

Summary:

Zone mapping:
The Lon/X direction of a zone-rectangle is used to indicate a map-boundry crossing face.
P2x-P1x = pos = normal face, P2x-P1x = neg = map-border crossing. (the diff-value plays no role)
(TFTD seems to have some wrongly placed zones in relation to this)

Overlapping zones:
First(or lower id value) takes precedents over later zones.

No zone: (Regional zones Only)
In the case there is no Zone, the first zone in the list is taken as default fallback.
(in ufo this is only a small region, in TFTD this is a lot of space that is targeted as 'North Atlantic')

Probably wrongly mapped zones:
TFTD: 'ICELANDIC UNION' for sure, 'USA' looks odd.

Personal oppinion: Ufo maps look clean, TFTD maps look rushed.

TYPE | UFO-CE | TFDT-CE
Border/River | 0x074AD4 - 074DF7 (804) | 0x08AE00 - 08B00F (528)
CountryName loc. | 0x074DF8 - 074E57 (96) | 0x08B010 - 08B06F (96)
RegionalZones | 0x074F38 - 07508B (340) | 0x08B1D0 - 08B34B (380)
CountryZones | 0x075090 - 075201 (370) | 0x08B350 - 08B4CB (380)

trivial: worldmap ufo has 2 double polygons.(aus-region)