本帖最后由 kong12 于 2009-9-9 22:06 编辑
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太平洋战争二维坐标系详解 # l& ~% g. c8 E$ {
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例如: ) k: \3 V5 Z7 G! b* F+ t, @
坐标55,67 1 S' M% M' [9 t7 A
我们用x,y,分别代表这两个坐标。 x=55 y=67" }2 d. p* g2 }" _% J
那么,x就是指向正右的,y是指向正下。大地图最左上角是零点。 3 k W4 F' ]' r6 l) v
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值得注意的是,我们这里的坐标不是象大家所想的那样,它不同于常用的平面直角坐标系。
) O; y8 f; K5 O0 _+ l如图所示:
( \: o4 a* s) H2 j3 w' ~ ``````````````
+ h5 `5 ]+ l0 E. ]``````````````````` 5 ^6 ?4 Y$ w( ^6 J+ X: \. Q
```````````````````│ 3 U0 A1 v, o, q, v7 x- } o1 t) c8 ~* H
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) d$ k( c' L! p/ ~6 |, o```````````````````│ 2 i, w8 L" d3 o$ w+ R
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, O: n/ |3 [8 r9 M/ H% {& q0 C````````───────┼──────→右(x轴)
' Z6 ]# W0 F, p) k' r s/ q) ````````````````````│ X( ^. R- ]3 y( C
```````````````````│ 9 L6 x& u6 q* `% k$ [
```````````````````│ - \7 B# l) k+ F5 Q6 e
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/ a. G l9 P8 b8 \! E/ _ ↓
) D) f! T* u! x; w6 J v 下(y轴)
) s D+ ]& s8 N; @7 h7 `; K````````````````太平洋战争二维坐标系 |