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Compact text encoding of latitude/longitude coordinates (By Microsoft)

Compact text encoding of latitude/longitude coordinates
(By Microsoft)
US Patent 7302343
It is almost the same as Natural Area Coding System(NAC). According to NAC Geographic products, after NAC contact to Microsoft and rejected their offer, Microsoft applied this patent by their own, and NAC declare that it is infringed . Differences between NAC and Microsoft’s is,
1. NAC use capital alphabet, Microsoft use small alphabet
2. NAC does not use, ‘A’,’E’,’I’,’O’,’U’ and ‘Y’. Microsoft does not use ‘a’,’e’,’i',’o’,’u’, and ‘l’.
3. In NAC, latitude comes first. In Microsoft code, longitude comes first.
4. In Microsoft, there is no space between latitude part and longitude part.
Otherwise, all are the same as NAC including its concept.
Following a base 32 table used
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
0 1 2 3 4 5 6 7 8 9 b c d f g
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
h j k m n p q r s t v w x y z
Letter not to be used "a", "e", "i", "o", "u" and "l"

Sample Code
ry7cx4tp95