本帖最后由 kong12 于 2009-9-9 22:06 编辑 ) c. ?; V/ @ ]( Q* y: T
$ R% o# Q: E& `9 [/ ]% \- j太平洋战争二维坐标系详解 % s: n3 ]6 d" s+ z* _
4 }2 I+ \9 F6 |% @/ ~3 K1 t例如:
; G) a( Y- V; c. Z8 G( w坐标55,67 0 C& d% \8 G! C+ z
我们用x,y,分别代表这两个坐标。 x=55 y=67
X; w; |/ p2 @ R" d1 X6 V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。
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7 c1 u8 m9 c& g, w1 J) a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。 9 G, k( I6 F5 H" h9 v1 Y; @
如图所示:
/ [5 \7 b4 `$ ], s4 \- m ``````````````
% s$ ~; N+ R" k2 ]``````````````````` * u! H" j1 Y; `6 A$ _1 O7 L) q" X" D& `
```````````````````│ / V( F3 g& M' |
```````````````````│ 4 t9 s0 s$ w- F8 q4 A( c, Y6 y" ]/ i
```````````````````│ 7 q: e5 z5 S0 J
```````````````````│
- A: d( O/ S8 w' _' R8 q/ Y; Q) g* r````````───────┼──────→右(x轴) 3 E& t" [5 E, o2 F) K5 @
```````````````````│ 1 H7 V2 ^7 K4 Y5 E
```````````````````│ + G5 T) P. J4 ~8 c% E" |
```````````````````│ 8 ]0 b3 {3 u r) e# a% F7 ?/ ~* P* r4 x
```````````````````│ ( P E) K# [6 q
↓; W( b7 Q+ S% Q$ k/ w
下(y轴)5 \4 J( |0 ]% f
````````````````太平洋战争二维坐标系 |