Dots in a circle 圈里的点

HerrSascha的cache,一个在上海开始geocaching 的德国人。

http://www.geocaching.com/seek/cache_details.aspx?guid=f6b86ee1-1eae-49a0-9adf-7035da820b30

A cache in a nice park in Shanghai. You can get there easily by metro (line 2). Get off the station "Shanghai Science & Technology Museum".

Ok... you got off the metro, so let's start at the square between the two exits! The coordinates for the startposition are:
N 31°13.309 / E 121°32.320

If you have a look around, you'll see it is the most
beautiful metrostation in Shanghai ;-)
For a long time this was the metrostation near my home before I moved to Lujiazui.

Make sure you have the "8 poles" in your back and face to the "broad footpath" in ESE-direction. Follow the way to the entrance of the park.

At the gate of the park -unfortunately- you have to pay the charge of 10 kuai to get in.

If you paid the fee and are still interested in finding the cache, go to the following coordinates, so you can start the hunt:

STAGE 1:

N 31°13.128 / E 121°32.692

There you'll see some pillars. The quantity of the poles is A. Now, you can calculate the next coordinates with the given formula:

B=A+4
C=B-1
D=C-1

The new coordinates are:

N 31°13.0BC / E 121°33.0DD

STAGE 2:

At the next position you'll find a small pavilion-like building, which has two cupolas underneath the roof. Have a closer look above your head while standing inside the building and you'll see a big circle with many small dots at the border. Count the the dots, the number of them is E.
(You can chose each of both cupolas, the result will be the same!)

The coordinates for the last intermediate point are:

N 31°13.0(C*E+C) / E 121°32.9(E-(B+C+2*D))

STAGE 3:

At this point you will see an information board. On the map there are some landmarks, each of them has a different number. Use the numbers to complete the coordinates for the cacheposition:

F: landmark no. Bright Lake
G: landmark no. Potted Landscape Garden
H: landmark no. Green World (Embrossment)

N 31°12.F(2*E-C) / E 121°32.FGH

CACHE PLACE:

At the cacheplace be careful with the sharp-edged stones!
The cache is a small box (chinese kind of tupperware, probably lower quality - I hope the cache won't get wet) wrapped in a plastic bag.

Make sure, that you put back the cache in the same position and it is not seen by bare eyes... thank you!

简翻：

点1：

N 31°13.128 / E 121°32.692 在这里看到A根柱子。

B=A+4
C=B-1
D=C-1

点2：N 31°13.0BC / E 121°33.0DD 小亭子，抬头看，有2个圈，圈里有点，数一个，点的个数E

点3：N 31°13.0(C*E+C) / E 121°32.9(E-(B+C+2*D)) 路标：

F: Bright Lake的号码
G: Potted Landscape Garden的号码
H: Green World (浮雕)的号码

Cache:N 31°12.F(2*E-C) / E 121°32.FGH

很显然，这个是在世纪公园里的，可以和另几个一起找，少点破费。

这个cache的点3算出来是负值，最近一个找到的geocacher也证实了这一点。不过影响不大，那个路标还是挺容易找到的。

今天找到，算点3是有点乱，搞不清楚他到底是怎么算的，反正各种可能试了试，再随便找个牌子也就解决了。

这个cache最终的地方和relaxing in Shanghai真的很像，到处都是石头，那个hint基本是没什么用了，看上去好像每块石头上都有可能。那里能动的石头我基本都翻遍了，就在我准备放弃的最后一次尝试时，终于给我找到了，还好那里没什么人，能让我一直晃下去。

经过一番重游，发现Stage2的那个亭子不知道为什么没有了。可能这使得不少去寻宝的朋友很疑惑，甚至提出了宝藏已经不在了的信息。但实际情况是，宝藏还在原地...现在Sascha对第二步E这个数字进行了保留，但把坐标移到了另一个地方，公式也会有相应的变动。希望接下来大家能有所斩获...