Belgium Topo50 Challenge Mystery Cache
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Difficulty:
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Terrain:
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Size: 
(micro)
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The coordinates above are those of the origin of the Lambert 2008 projection. The cache is not hidden at this location, but at N 50° 47.780 E 004° 21.455.
The map series at scale 1:50 000 of the National Geographic Institute comprises 57 maps covering Belgium.
To qualify to log this challenge cache as a find*, you must have found at least one Belgian** cache on each of these maps. All cache types are allowed, except lab caches.
* Cachers may sign a challenge cache's physical log at any time. However, the challenge cache may be logged as found online only after the log is signed and the challenge tasks have been met and documented.
** The posted listing coordinates have to be within the borders of Belgium as used by Project-GC.
Additional Hints
(Decrypt)
Bpgntba