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China GPS Offset Mystery Cache

Hidden : 2/16/2018
Difficulty:
2 out of 5
Terrain:
1.5 out of 5

Size: Size:   other (other)

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Geocache Description:


This geocache is NOT located at the posted coordinates.  You need to solve the puzzle and find out the final location.

 

Fact:

When geocachers all over the world come to Mainland China to find and hide geocaches, they often face so called 'GPS Offset' issue and get confused. The following example may explain this problem:

 

 

The posted coordinates of this cache should be positioned at the green point on the map imagery above. In reality, if you go geocaching with officially licensed maps in China (such as Google Street Map using in geocaching.com), that coordinates will somehow shift to the red point on the imagery. To reflect the actual position (the green point) on such maps, you will have to use coordinates N39° 54.626 E116° 23.848 instead. The cause to this strange issue and the related coordinates conversion would be up to you to figure out...

Puzzle:

Now just imagine: If I hide a cache at N40° 07.642 E082° 00.298 in Taklamakan Desert, what coordinates are you to use to show its accurate location on those China official maps? 

 

Additional Hints (Decrypt)

Chmmyr: +/- 3 zrgref; Pnpur: Zber vasb va purpxre.

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)